Promedica Health System, Inc. v. Federal Trade Commission , 749 F.3d 559 ( 2014 )


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  •                         RECOMMENDED FOR FULL-TEXT PUBLICATION
    Pursuant to Sixth Circuit I.O.P. 32.1(b)
    File Name: 14a0083p.06
    UNITED STATES COURT OF APPEALS
    FOR THE SIXTH CIRCUIT
    _________________
    PROMEDICA HEALTH SYSTEM, INC.,                     ┐
    Petitioner, │
    │
    │         No. 12-3583
    v.                                           │
    >
    │
    FEDERAL TRADE COMMISSION.                            │
    Respondent.     │
    ┘
    On Petition for Review of a Final Order of the
    Federal Trade Commission
    No. 9346.
    Argued: March 7, 2013
    Decided and Filed: April 22, 2014
    Before: KETHLEDGE, WHITE, and STRANCH, Circuit Judges.
    _________________
    COUNSEL
    ARGUED: Douglas R. Cole, ORGAN COLE + STOCK LLP, Columbus, Ohio, for Petitioner.
    Michele Arington, FEDERAL TRADE COMMISSION, Washington, D.C., for Respondent. ON
    BRIEF: Douglas R. Cole, Erik J. Clark, ORGAN COLE + STOCK LLP, Columbus, Ohio,
    David Marx, Jr., Stephen Y. Wu, MCDERMOTT WILL & EMERY LLP, Chicago, Illinois, for
    Petitioner. Michele Arington, John F. Daly, FEDERAL TRADE COMMISSION, Washington,
    D.C., for Respondent. Beth Heifetz, Tara Stuckey Morrissey, JONES DAY, Washington, D.C.,
    Mark J. Botti, Hyland Hunt, AKIN GUMP STRAUSS HAUER & FELD LLP, Washington,
    D.C., for Amici Curiae.
    1
    No. 12- 3583      ProMedica Health Sys., Inc. v. Fed. Trade Comm’n            Page 2
    _________________
    OPINION
    _________________
    KETHLEDGE, Circuit Judge. This is an antitrust case involving a proposed merger
    between two of the four hospital systems in Lucas County, Ohio. The parties to the merger were
    ProMedica, by far the county’s dominant hospital provider, and St. Luke’s, an independent
    community hospital. The two merged in August 2010, leaving ProMedica with a market share
    above 50% in one relevant product market (for so-called primary and secondary services) and
    above 80% in another (for obstetrical services).        Five months later, the Federal Trade
    Commission challenged the merger under § 7 of the Clayton Act, 15 U.S.C. § 18.             After
    extensive hearings, an Administrative Law Judge and later the Commission found that the
    merger would adversely affect competition in violation of § 7. The Commission therefore
    ordered ProMedica to divest St. Luke’s.         ProMedica now petitions for review of the
    Commission’s order, arguing that the Commission was wrong on both the law and the facts in its
    analysis of the merger’s competitive effects. We think the Commission was right on both
    counts, and deny the petition.
    I.
    A.
    Lucas County is located in the northwestern corner of Ohio, with approximately 440,000
    residents. Toledo lies near the county’s center; more affluent suburbs lie to the southwest. Two-
    thirds of the county’s patients have government-provided health insurance, such as Medicare or
    Medicaid. Twenty-nine percent of the county’s patients have private health insurance, which
    pays significantly higher rates to hospitals than government-provided insurance does. (Medicare
    and Medicaid reimbursements generally do not cover the providers’ actual cost of services.) A
    relatively large proportion of the county’s privately insured patients reside in the county’s
    southwestern corner.
    This case concerns the market—or markets, depending on how one defines them—for
    “general acute-care” (GAC) inpatient services in Lucas County. GAC comprises four basic
    categories of services.    The most basic are “primary services,” such as hernia surgeries,
    No. 12- 3583      ProMedica Health Sys., Inc. v. Fed. Trade Comm’n             Page 3
    radiology services, and most kinds of inpatient obstetrical (OB) services. “Secondary services,”
    such as hip replacements and bariatric surgery, require the hospital to have more specialized
    resources. “Tertiary services,” such as brain surgery and treatments for severe burns, require
    even more specialized resources. And “quaternary services,” such as major organ transplants,
    require the most specialized resources of all.
    Different hospitals offer different levels of these services.    There are four hospital
    providers in Lucas County. The most dominant is ProMedica, with 46.8% of the GAC market in
    Lucas County in 2009. ProMedica operates three hospitals in the county, which together provide
    primary (including OB), secondary, and tertiary services. The county’s second-largest provider
    is Mercy Health Partners, with 28.7% of the GAC market in 2009. Mercy likewise operates
    three hospitals in the county, which together provide primary (including OB), secondary, and
    tertiary services. The University of Toledo Medical Center (UTMC) is the county’s third-largest
    provider, with 13% of the GAC market. UTMC operates a single teaching and research hospital,
    just south of downtown Toledo, and focuses on tertiary and quaternary services. It does not offer
    OB services. The remaining provider is St. Luke’s Hospital, which before the merger was an
    independent, not-for-profit hospital with 11.5% of the GAC market. St. Luke’s offers primary
    (including OB) and secondary services, and is located in southwest Lucas County.
    B.
    With respect to privately insured patients, hospital providers do not all receive the same
    rates for the same services. Far from it: each hospital negotiates its rates with private insurers
    (known as Managed Care Organizations, or MCOs); and the rates themselves are determined by
    each party’s bargaining power.
    The parties’ bargaining power depends on a variety of factors. An MCO’s bargaining
    power depends primarily on the number of patients it can offer a hospital provider. Hospitals
    need patients like stores need customers; and hence the greater the number of patients that an
    MCO can offer a provider, the greater the MCO’s leverage in negotiating the hospital’s rates.
    But MCOs compete with each other just as hospitals do. And to attract patients, an MCO’s
    health-care plan must offer a comprehensive range of services—primary, secondary, tertiary, and
    quaternary—within a geographic range that patients are willing to travel for each of those
    No. 12- 3583       ProMedica Health Sys., Inc. v. Fed. Trade Comm’n               Page 4
    services. (The range is greater for some services than others.) These criteria in turn create
    leverage for hospitals to raise rates: to the extent patients view a hospital’s services as desirable
    or even essential—say, because of the hospital’s location or its reputation for quality—the
    hospital’s bargaining power increases.
    But another important criterion for a plan’s competitiveness is its cost. Thus, if a hospital
    demands rates above a certain level—the so-called “walk-away” point—the MCO will try to
    assemble a network without that provider. For example, rather than include all four hospital
    providers in its network, the MCO might include only three. If a provider becomes so dominant
    in a particular market that no MCO can walk away from it and remain competitive, however,
    then that provider can demand—and more to the point receive—monopoly rates (i.e., prices
    significantly higher than what the MCOs would pay in a competitive market).
    Here, before the merger, MCOs in Lucas County had sometimes offered networks that
    included all four hospital providers, but sometimes offered networks that included only three.
    From 2001 until 2008, for example, Lucas County’s largest MCO, Medical Mutual of Ohio,
    successfully marketed a network of Mercy, UTMC, and St. Luke’s. Since 2000, however, no
    MCO has offered a network that did not include either ProMedica or St. Luke’s—the parties to
    the merger here.
    C.
    The likely reason MCOs have historically found it necessary to include either ProMedica
    or St. Luke’s in their networks is that those providers are dominant in southwest Lucas County,
    where St. Luke’s is located. In that part of the county—relatively affluent, and with a high
    proportion of privately insured patients—ProMedica and St. Luke’s were direct competitors
    before the merger at issue here. Indeed, St. Luke’s viewed ProMedica as its “most significant
    competitor,” while ProMedica viewed St. Luke’s as a “[s]trong competitor”—strong enough, in
    fact, that ProMedica offered to discount its rates by 2.5% for MCOs who excluded St. Luke’s
    from their networks. But in this competition ProMedica had the upper hand. It is harder for an
    MCO to exclude the county’s most dominant hospital system than it is for the MCO to exclude a
    single hospital that services just one corner of the county—a corner, moreover, that the dominant
    system also services. And that means the MCOs’ walk-away point for the dominant system is
    No. 12- 3583      ProMedica Health Sys., Inc. v. Fed. Trade Comm’n                Page 5
    higher—perhaps much higher—than it is for the single hospital. Here, the record bears out that
    conclusion: ProMedica’s rates before the merger were among the highest in the State, while St.
    Luke’s rates did not even cover its cost of patient care. That was true even though St. Luke’s
    quality ratings on the whole were better than ProMedica’s.
    As a result, St. Luke’s struggled in the years before the merger, losing more than $25
    million between 2007 and 2009. To improve matters, St. Luke’s hired Daniel Wakeman, a
    hospital-turnaround specialist, as its CEO. Wakeman implemented a three-year plan to reduce
    costs, increase revenues, and regain patient volume from ProMedica. Eventually St. Luke’s
    fortunes began to improve: by August 2010, St. Luke’s was out of the red (albeit barely), and
    Wakeman reported that “this positive margin confirms that we can run in the black if activity
    stays high.”
    By then, however, St. Luke’s was contemplating other options.              In August 2009,
    Wakeman presented three options to St. Luke’s Board. The first was for St. Luke’s to “[r]emain
    independent” by “cut[ting] major services” until an “accepted margin is realized.” The second
    was for St. Luke’s to “[p]ush the [MCOs] . . . to raise St. Luke’s reimbursement rates to an
    acceptable margin.” Under this option, Wakeman noted, “the message [to MCOs] would be [to]
    pay us now (a little bit more) or pay us later (at the other hospital system contractual rates).” The
    third option was for St. Luke’s to join one of the three other providers in Lucas County—
    ProMedica, Mercy, or UTMC.
    Of all these options, Wakeman believed that a merger with ProMedica “ha[d] the greatest
    potential for higher hospital rates. A ProMedica-[St. Luke’s] partnership would have a lot of
    negotiating clout.” Wakeman also recognized, however, that an affiliation with ProMedica could
    “[h]arm the community by forcing higher hospital rates on them.”
    Three months later, Wakeman recommended to St. Luke’s Board that it pursue a merger
    with ProMedica. The Board accepted the recommendation the same day. Six months later, on
    May 25, 2010, ProMedica and St. Luke’s signed a merger agreement.
    D.
    In July 2010—less than two months after the agreement was signed—the FTC opened an
    investigation into the merger’s competitive effects. A month later, the FTC and ProMedica
    No. 12- 3583      ProMedica Health Sys., Inc. v. Fed. Trade Comm’n              Page 6
    entered into a “Hold Separate Agreement” that allowed ProMedica to close the deal, but that,
    during the pendency of the FTC investigation, barred ProMedica from terminating St. Luke’s
    contracts with MCOs, eliminating or transferring St. Luke’s clinical services, or terminating St.
    Luke’s employees without cause. With these restrictions in place, ProMedica and St. Luke’s
    closed the merger deal on August 31, 2010.
    In January 2011, the FTC filed an administrative complaint against ProMedica. Later
    that month, the FTC and the state of Ohio filed a separate complaint in federal district court in
    Toledo, seeking a preliminary injunction that would extend the Hold Separate Agreement
    pending the outcome of the FTC’s administrative complaint. The district court granted the
    injunction.
    Meanwhile, in the administrative proceeding, an ALJ held a hearing that lasted over 30
    days and produced more than 8,000 pages of trial testimony and over 2,600 exhibits.             In
    December 2011, the ALJ issued a lengthy written decision. The ALJ found that the merger
    would “result[] in a tremendous increase in concentration in a market that already was highly
    concentrated”; that the merger would eliminate competition between ProMedica and St. Luke’s,
    thereby increasing ProMedica’s bargaining power with MCOs; and that ProMedica would be
    particularly dominant in southwest Lucas County—an area with a relatively high proportion of
    privately insured patients.   Thus, the ALJ found that the merger would allow ProMedica
    unilaterally to increase its prices above a competitive level. The ALJ also found that the merger
    did not create any efficiencies sufficient to offset its anticompetitive effects. Consequently, the
    ALJ concluded that the merger likely would substantially lessen competition in violation of § 7
    of the Clayton Act. As a remedy, the ALJ ordered ProMedica to divest St. Luke’s.
    ProMedica appealed the ALJ’s decision to the Commission, which found that the merger
    increased ProMedica’s market share far above the threshold required to create a presumption that
    the merger would lessen competition. The Commission also found that a large body of other
    evidence—including documents and testimony from the merging parties themselves, testimony
    from the MCOs, and expert testimony—confirmed that the merger would have a substantial
    anticompetitive effect. The Commission therefore affirmed the ALJ’s decision and ordered
    ProMedica to divest St. Luke’s.
    No. 12- 3583      ProMedica Health Sys., Inc. v. Fed. Trade Comm’n               Page 7
    This petition followed.
    II.
    We review the Commission’s legal conclusions de novo, and its factual findings under
    the substantial-evidence standard. 15 U.S.C. § 21(c); Realcomp II, Ltd. v. FTC, 
    635 F.3d 815
    ,
    823 (6th Cir. 2011). Substantial evidence is evidence that “a reasonable mind might accept as
    adequate to support a conclusion.” Realcomp 
    II, 635 F.3d at 824
    (quoting Universal Camera
    Corp. v. NLRB, 
    340 U.S. 474
    , 477 (1951)).
    Section 7 of the Clayton Act prohibits mergers “where in any line of commerce . . . the
    effect of such acquisition may be substantially to lessen competition, or to tend to create a
    monopoly.” 15 U.S.C. § 18. As its language suggests, Section 7 deals in “probabilities, not
    certainties.” Brown Shoe Co. v. United States, 
    370 U.S. 294
    , 323 (1962).
    A.
    “Merger enforcement, like other areas of antitrust, is directed at market power.” FTC v.
    H.J. Heinz Co., 
    246 F.3d 708
    , 713 (D.C. Cir. 2001) (quoting Lawrence A. Sullivan & Warren S.
    Grimes, The Law of Antitrust § 9.1 at 511 (2000)). Market power is itself a term of art that the
    Department of Justice’s Horizontal Merger Guidelines (which we consider useful but not binding
    upon us here) define as the power of “one or more firms to raise price, reduce output, diminish
    innovation, or otherwise harm consumers as a result of diminished competitive constraints or
    incentives.” Horizontal Merger Guidelines (2010) (“Merger Guidelines”) § 1 at 2.
    Often, the first steps in analyzing a merger’s competitive effects are to define the
    geographic and product markets affected by it. See United States v. Gen. Dynamics Corp.,
    
    415 U.S. 486
    , 510 (1974). Here, the parties agree that the relevant geographic market is Lucas
    County. The relevant product market or markets, however, are more difficult. The first principle
    of market definition is substitutability: a relevant product market must “identify a set of products
    that are reasonably interchangeable[.]” Horizontal Merger Guidelines § 4.1. Chevrolets and
    Fords might be interchangeable in this sense, but Chevrolets and Lamborghinis are probably not.
    See 2B Phillip E. Areeda, Herbert Hovenkamp & John L. Solow, Antitrust Law ¶ 533e at 259
    (3d ed. 2007). “The general question is whether two products can be used for the same purpose,
    No. 12- 3583         ProMedica Health Sys., Inc. v. Fed. Trade Comm’n            Page 8
    and if so, whether and to what extent purchasers are willing to substitute one for the other.”
    F.T.C. v. Arch Coal, Inc., 
    329 F. Supp. 2d 109
    , 119 (D.D.C. 2004) (quotations omitted).
    By this measure, each individual medical procedure could give rise to a separate market:
    “[i]f you need your hip replaced, you can’t decide to have chemotherapy instead.” United States
    v. Rockford Mem’l Corp., 
    898 F.2d 1278
    , 1284 (7th Cir. 1990). But nobody advocates that we
    analyze the effects of this merger upon hundreds if not thousands of markets for individual
    procedures; instead, the parties agree that we should “cluster” these markets somehow. The
    parties disagree, however, on the principles that should govern which services are clustered and
    which are not.
    Two theories of clustering are pertinent here. The first—which the FTC advocates and
    the Commission adopted—is the “administrative-convenience” theory. (A better name might be
    the “similar-conditions” theory.) This theory holds, in essence, that there is no need to perform
    separate antitrust analyses for separate product markets when competitive conditions are similar
    for each. See Emigra Group v. Fragomen, 
    612 F. Supp. 2d 330
    , 353 (S.D.N.Y. 2009). In Brown
    Shoe, for example, the Supreme Court analyzed together the markets for men’s, women’s, and
    children’s shoes, because the competitive conditions for each of them were 
    similar. 370 U.S. at 327-28
    .
    The competitive conditions for hospital services include the barriers to entry for a
    particular service—e.g., how difficult it might be for a new competitor to buy the equipment and
    sign up the professionals necessary to offer the service—as well as the hospitals’ respective
    market shares for the service and the geographic market for the service. See Jonathan B. Baker,
    The Antitrust Analysis of Hospital Mergers and the Transformation of the Hospital Industry,
    Law & Contemp. Probs., Spring 1988, at 93, 138; United States v. Long Island Jewish Med. Ctr.,
    
    983 F. Supp. 121
    , 142-43 (E.D.N.Y. 1997). If these conditions are similar for a range of
    services, then the antitrust analysis should be similar for each of them. Long 
    Island, 983 F. Supp. at 142-43
    . Thus, if the competitive conditions for, say, secondary inpatient procedures are all
    reasonably similar, then we can cluster those services when analyzing a merger’s competitive
    effects.
    No. 12- 3583      ProMedica Health Sys., Inc. v. Fed. Trade Comm’n              Page 9
    Here, the Commission applied this theory to cluster both primary services (but excluding
    OB, for reasons discussed below) and secondary services for purposes of analyzing the merger’s
    competitive effects. Substantial evidence supports that demarcation. The respective market
    shares for each of Lucas County’s four hospital systems (ProMedica, Mercy, UTMC, St. Luke’s)
    are similar across the range of primary and secondary services. A hospital’s market share for
    shoulder surgery, for example, is similar to its market share for knee replacements. Barriers to
    entry are likewise similar across primary and secondary services. So are the services’ respective
    geographic markets.    Thus, the competitive conditions across the markets for primary and
    secondary services are similar enough to justify clustering those markets when analyzing the
    merger’s competitive effects. See Emigra 
    Group, 612 F. Supp. 2d at 353
    .
    But the same is not true for OB services, whose competitive conditions differ in at least
    two respects from those for other services. First, before the merger, ProMedica’s market share
    for OB services (71.2%) was more than half-again greater than its market share for primary and
    secondary services (46.8%). And the merger would drive ProMedica’s share for OB services
    even higher, to 80.5%—no small number in this area of the law. Second, and relatedly, before
    the merger there were only three hospital systems that provided OB services in Lucas County
    (ProMedica, Mercy, St. Luke’s) rather than four; after the merger, there would be only two.
    (One might also suspect that the geographic market for OB services is smaller than it is for other
    primary services—one can drive only so far when the baby is on the way—but the record is not
    clear on that point.) The Commission therefore flagged OB as a separate relevant market for
    purposes of analyzing the merger’s competitive effects. For the reasons just stated, substantial
    evidence supports that decision.
    Finally, the Commission excluded tertiary services from its analysis of the merger’s
    competitive effects.   The competitive conditions for tertiary services differ from those for
    primary and secondary services, in part because patients are willing to travel farther for tertiary
    services (e.g., a liver transplant) than they are for primary or secondary services (e.g., hernia
    surgery). Indeed, UTMC’s representative testified that, “[f]or the tertiary . . . services, we
    compete with . . . institutions such as the University of Michigan, the Cleveland Clinic,
    University Hospital in Cleveland, and the Ohio State University.” The geographic market for
    tertiary services is therefore larger than the geographic market for primary and secondary
    No. 12- 3583       ProMedica Health Sys., Inc. v. Fed. Trade Comm’n             Page 10
    services. Moreover, the hospitals’ respective market shares for these services are different than
    their respective shares for primary or secondary services; St. Luke’s market share for tertiary
    services, for example, is nearly zero. Thus, the competitive conditions for tertiary services differ
    from those for primary and secondary services. (The same is undisputedly true for quaternary
    services, which the Commission likewise excluded from its analysis.)
    To all this ProMedica offers two responses. The first concerns the 2010 Horizontal
    Merger Guidelines. Section 4 of the Guidelines provides that “[m]arket definition focuses solely
    on demand substitution factors”—that is, the extent to which consumers regard one product as a
    substitute for another.      And ProMedica points out that the Commission’s use of the
    administrative-convenience theory (to cluster the markets for primary and secondary services)
    focuses on market shares and entry conditions—both of which, ProMedica correctly observes,
    are “supply-side” considerations. (Entry conditions, for example, concern the ease with which
    new competitors can enter the relevant market and thus augment the supply for a particular
    product.) Thus, ProMedica concludes, the Commission’s clustering methodology contradicts the
    Horizontal Merger Guidelines.
    But ProMedica’s conclusion does not follow.              The reference to demand-side
    considerations in § 4 of the Guidelines concerns the manner in which one defines a relevant
    market, not the conditions under which one can cluster admittedly different markets when
    analyzing a merger’s competitive effects.        The administrative-convenience theory asks a
    different question (whether the competitive conditions for two markets are similar enough to
    analyze them together) than the one answered by § 4 of the Guidelines (how one defines an
    individual market in the first place). To analogize to a different area of law: ProMedica’s
    argument is like saying that a district court should not certify a particular class because it
    includes different plaintiffs.
    ProMedica’s second response is to offer an altogether different approach to clustering,
    which in some quarters is known as the “transactional-complements” theory. (Per Orwell’s
    admonition to use concrete terms instead of vague ones, see Orwell, Politics and the English
    Language (1946), we call this the “package-deal” theory instead.) The package-deal theory
    holds that, if “most customers would be willing to pay monopoly prices for the convenience” of
    No. 12- 3583      ProMedica Health Sys., Inc. v. Fed. Trade Comm’n             Page 11
    receiving certain products as a package, then the relevant market for those products is the market
    for the package as a whole. 2B Areeda, Antitrust Law, ¶ 565c at 408. That is true even though
    the individual products in the package are not substitutes for each other. 
    Id. For example,
    in
    United States v. Grinell Corp., 
    384 U.S. 563
    , 572 (1966), the Supreme Court found that the
    relevant market for a package of centrally monitored alarm services (burglar and fire) was the
    market for the package as a whole.
    ProMedica argues that the package-deal theory applies here because MCOs typically
    bargain for all of a hospital’s services in a single negotiation. That is true enough; but the
    specific “package” that ProMedica advocates is one comprising not only primary (excluding OB)
    and secondary services—which everyone agrees should be clustered when analyzing the
    merger’s competitive effects—but also tertiary and OB services. And that makes the question
    presented by ProMedica’s argument much narrower. To wit: whether the MCOs are willing to
    pay a premium to have a package of services that includes tertiary and OB delivered by a single
    provider. If so, the relevant market is the market for the package as a whole. See 2B Areeda
    ¶ 565c at 408.
    But the record makes plain that the MCOs do not demand from each hospital a package
    of services that includes tertiary and OB. For example, St. Luke’s offers virtually no tertiary
    services, and yet the MCOs still contract for the services that St. Luke’s does offer. Likewise,
    UTMC does not offer OB services, and yet the MCOs still contract with UTMC. And as for the
    hospital systems that do provide all those services—i.e., ProMedica and Mercy—there is no
    evidence that MCOs are willing to pay a premium to have all of those services delivered by
    either of those providers in a single package. It is true that MCOs must offer their members (i.e.,
    patients) a network that provides a complete package of hospital services. But the record shows
    that the MCOs do not need to obtain all of those services from a single provider. There are no
    market forces that bind primary, secondary, tertiary, and OB services together like a single
    plywood sheet.
    In summary, even ProMedica conceded in its answer to the FTC’s complaint that the
    “more sophisticated and specialized tertiary and quaternary services, such as major surgeries and
    organ transplants, also are properly excluded from the relevant market[.]”          Answer ¶ 13.
    No. 12- 3583      ProMedica Health Sys., Inc. v. Fed. Trade Comm’n           Page 12
    ProMedica was correct to make that concession then, and incorrect to seek to retract it now. The
    relevant markets, for purposes of analyzing the merger’s competitive effects, are what the
    Commission says they are: (1) a cluster market of primary (but not OB) and secondary inpatient
    services (hereafter, the “GAC market”), and (2) a separate market for OB services.
    B.
    ProMedica’s next argument is that the Commission relied too heavily on market-
    concentration data to establish a presumption of anticompetitive harm. Agencies typically use
    the Herfindahl-Hirschman Index (HHI) to measure market concentration.                “The HHI is
    calculated by summing the squares of the individual firms’ market shares, and thus gives
    proportionately greater weight to the larger market shares.” Merger Guidelines § 5.3 at 18.
    Agencies use HHI data to classify markets into three types: “unconcentrated markets,” which
    have an HHI below 1500; “moderately concentrated markets,” which have an HHI between 1500
    and 2500; and “highly concentrated markets,” which have an HHI above 2500. 
    Id. at 19.
    The
    Guidelines further provide that “[m]ergers resulting in highly concentrated markets that involve
    an increase in the HHI of more than 200 points will be presumed to be likely to enhance market
    power.” Thus, as a general matter, a merger that increases HHI by more than 200 points, to a
    total number exceeding 2500, is presumptively anticompetitive. 
    Id. § 5.3
    at 19; see also, e.g.,
    
    Heinz, 246 F.3d at 716
    (merger that would have increased HHI by 510 points to 5,285 created
    presumption of anticompetitive effects by a “wide margin”); United States v. H & R Block, Inc.,
    
    833 F. Supp. 2d 36
    , 72 (D.D.C. 2011) (merger that would have increased HHI by approximately
    400 points to 4,691 created presumption of anticompetitive effects).
    The merger here blew through those barriers in spectacular fashion. In the GAC market,
    the merger would increase the HHI by 1,078 (more than five times the increase necessary to
    trigger the presumption of illegality) to a total number of 4,391 (almost double the 2,500
    threshold for a highly concentrated market). The OB numbers are even worse: the merger
    would increase HHI by 1,323 points (almost seven times the increase necessary for the
    presumption of illegality) to a total number of 6,854 (almost triple the threshold for a highly
    concentrated market). The Commission therefore found the merger to be presumptively illegal.
    No. 12- 3583       ProMedica Health Sys., Inc. v. Fed. Trade Comm’n             Page 13
    ProMedica responds that this sort of analysis—measuring HHI to apply a presumption of
    illegality—applies only in “coordinated-effects” cases, rather than in “unilateral-effects” ones.
    And the FTC admittedly challenges the merger only on unilateral-effects grounds here. The two
    theories are different: the idea behind coordinated effects is that, “where rivals are few, firms
    will be able to coordinate their behavior, either by overt collusion or implicit understanding in
    order to restrict output and achieve profits above competitive levels.” H&R Block, 833 F.
    Supp.2d at 77. A simple example might be parallel pricing by two gas stations located across the
    street from each other in a remote small town. Unilateral-effects theory, on the other hand, holds
    that “[t]he elimination of competition between two firms that results from their merger may
    alone constitute a substantial lessening of competition.” Merger Guidelines § 6 at 20. The most
    obvious example of this phenomenon is a “merger to monopoly”—e.g., where a market has only
    two firms, which then merge into one—but unilateral effects “are by no means limited to that
    case.”    
    Id. The Guidelines
    also distinguish between unilateral effects for “homogeneous
    products” and for “differentiated products.” Homogeneous products are indistinguishable from
    each other—oil, corn, coal—whereas differentiated products are similar enough to compete in a
    relevant market, but different enough that some customers prefer one product over another. The
    market for cola products is an example.       Here, the relevant markets involve differentiated
    products: hospitals have different doctors, facilities, and (perhaps above all) locations, which
    means that some patients prefer certain hospitals over others.
    “The extent of direct competition between the products sold by the merging parties is
    central to the evaluation of unilateral effects.” 
    Id. § 6.1.
    “Direct competition,” in this sense,
    does not mean merely that products are within a relevant market; instead, it refers to the extent to
    which consumers regard the products as close substitutes. Thus, unilateral-effects analysis
    examines whether differentiated products are not merely substitutes for one another, but close
    substitutes for some fraction of consumers. In the market for upscale sedans, for example, Audi
    and Jaguar might be closer substitutes for some consumers than Audi and Lincoln are. (For
    other consumers in the same market–say, consumers who prefer domestic brands—Lincoln and
    Cadillac might be closer substitutes.) These hierarchies of consumer preference, which are
    themselves iridescent from consumer to consumer, are critical to unilateral-effects analysis. For
    No. 12- 3583      ProMedica Health Sys., Inc. v. Fed. Trade Comm’n               Page 14
    “[u]nilateral price effects are greater, the more the buyers of products sold by one merging firm
    consider products sold by the other merging firm to be their next choice.” 
    Id. For a
    merger to raise concerns about unilateral effects, however, not every consumer in
    the relevant market must regard the products of the merging firms as her top two choices.
    Instead, “[s]ubstantial unilateral price elevation post-merger for a product sold by one of the
    merging firms normally requires that a significant fraction of the customers purchasing that
    product view products formerly sold by the other merging firm as their next-best choice.” 
    Id. at 20-21.
    That “significant fraction,” moreover, “need not approach a majority.” 
    Id. at 21.
    But none of this, in ProMedica’s view, has much to do with market concentration per se.
    Thus, what the Commission should have focused on, ProMedica says, is the extent to which
    consumers regard ProMedica as their next-best choice after St. Luke’s, or vice-versa. And
    ProMedica therefore argues that the Commission was wrong to presume the merger illegal based
    upon HHI data alone.
    The argument is one to be taken seriously.         The Guidelines themselves state that
    “[a]gencies rely much more on the value of diverted sales [i.e., in rough terms, the extent to
    which the products of the merging firms are close substitutes] than on the level of HHI for
    diagnosing unilateral price effects in markets with differentiated products.” 
    Id. But this
    case is
    exceptional in two respects. First, even without conducting a substitutability analysis, the record
    already shows a strong correlation between ProMedica’s prices—i.e., its ability to impose
    unilateral price increases—and its market share. Before the merger, ProMedica’s share of the
    GAC market was 46.8%, followed by Mercy with 28.7%, UTMC with 13%, and St. Luke’s with
    11.5%. And ProMedica’s prices were on average 32% higher than Mercy’s, 51% higher than
    UTMC’s, and 74% higher than St. Luke’s. Thus, in this market, the higher a provider’s market
    share, the higher its prices. In ProMedica’s case, that fact is not explained by the quality of
    ProMedica’s services or by its underlying costs. Instead, ProMedica’s prices—already among
    the highest in the State—are explained by bargaining power. As the Commission explained:
    “the hospital provider’s bargaining leverage will depend upon how the MCO would fare if its
    network did not include the hospital provider (and therefore became less attractive to potential
    members who prefer that provider’s services).” Op. 36. Here, the record makes clear that a
    No. 12- 3583      ProMedica Health Sys., Inc. v. Fed. Trade Comm’n            Page 15
    network which does not include a hospital provider that services almost half the county’s patients
    in one relevant market, and more than 70% of the county’s patients in another relevant market,
    would be unattractive to a huge swath of potential members. Thus, the Commission had every
    reason to conclude that, as ProMedica’s dominance in the relevant markets increases, so does the
    need for MCOs to include ProMedica in their networks—and thus so too does ProMedica’s
    leverage in demanding higher rates.
    The second respect in which this case is exceptional is simply the HHI numbers
    themselves. Even in unilateral-effects cases, at some point the Commission is entitled to take
    seriously the alarm sounded by a merger’s HHI data. And here the numbers are in every respect
    multiples of the numbers necessary for the presumption of illegality.        Before the merger,
    ProMedica already held dominant market shares in the relevant markets, which were themselves
    already highly concentrated. The merger would drive those numbers even higher—ProMedica’s
    share of the OB market would top 80%—which makes it extremely likely, as matter of simple
    mathematics, that a “significant fraction” of St. Luke’s patients viewed ProMedica as a close
    substitute for services in the relevant markets. On this record, the Commission was entitled to
    put significant weight upon the market-concentration data standing alone.
    These two aspects of this case—the strong correlation between market share and price,
    and the degree to which this merger would further concentrate markets that are already highly
    concentrated—converge in a manner that fully supports the Commission’s application of a
    presumption of illegality. What ProMedica overlooks is that the “ultimate inquiry in merger
    analysis” is not substitutability, but “‘whether the merger is likely to create or enhance market
    power or facilitate its exercise.’” Carl Shapiro, The 2010 Horizontal Merger Guidelines: From
    Hedgehog to Fox in Forty Years, 77 Antitrust L.J. 49, 57 (2010) (emphasis added) (quoting U.S.
    Dep’t of Justice & Fed. Trade Comm’n, Commentary on the Horizontal Merger Guidelines
    (2006)). Here, as shown above, the correlation between market share and price reflects a
    correlation between market share and market power; and the HHI data strongly suggest that this
    merger would enhance ProMedica’s market power even more, to levels rarely tolerated in
    antitrust law. In the context of this record, therefore, the HHI data speak to our “ultimate
    inquiry” as directly as an analysis of substitutability would. The Commission was correct to
    presume the merger substantially anticompetitive.
    No. 12- 3583      ProMedica Health Sys., Inc. v. Fed. Trade Comm’n            Page 16
    C.
    The remaining question is whether ProMedica has rebutted that presumption. ProMedica
    argues on several grounds that it has; but more remarkable is what ProMedica does not argue.
    By way of background, the goal of antitrust law is to enhance consumer welfare. See, e.g.,
    Brooke Group Ltd. v. Brown & Williamson Tobacco Corp., 
    509 U.S. 209
    , 221 (1993);
    2B Areeda ¶ 100 at 4 (“the principal objective of antitrust policy is to maximize consumer
    welfare by encouraging firms to behave competitively”) (cited in Kirtsaeng v. John Wiley &
    Sons, Inc, 
    133 S. Ct. 1351
    , 1363 (2013)); cf. Reiter v. Sonotone Corp., 
    442 U.S. 330
    , 343 (1979)
    (“Congress designed the Sherman Act as a ‘consumer welfare prescription’”) (quoting Bork, The
    Antitrust Paradox 66 (1978)). And the Merger Guidelines themselves recognize that “a primary
    benefit of mergers to the economy is their potential to generate significant efficiencies and thus
    enhance the merged firm’s ability and incentive to compete, which may result in lower prices,
    improved quality, enhanced service, or new products.” Merger Guidelines § 10 at 29; see also
    Shapiro, supra at 80 (“Efficiencies generate downward pricing pressure that may outweigh the
    upward pricing pressure”). Thus, the parties to a merger often seek to overcome a presumption
    of illegality by arguing that the merger would create efficiencies that enhance consumer welfare.
    See, e.g., FTC v. Univ. Health, Inc., 
    938 F.2d 1206
    , 1222 (11th Cir. 1991). But ProMedica did
    not even attempt to argue before the Commission, and does not attempt to argue here, that this
    merger would benefit consumers (as opposed to only the merging parties themselves) in any
    way. To the contrary, St. Luke’s CEO admitted that a merger with ProMedica might “[h]arm the
    community by forcing higher rates on them.” The record with respect to the merger’s effect on
    consumer welfare, therefore, only diminishes ProMedica’s prospects here.
    That the Commission did not merely rest upon the presumption, but instead discussed a
    wide range of evidence that buttresses it, makes ProMedica’s task more difficult still. On that
    score the Commission’s best witnesses were the merging parties themselves. Those witnesses
    established that ProMedica and St. Luke’s are direct competitors: St. Luke’s CEO testified that
    ProMedica was St. Luke’s “most significant competitor,” while a ProMedica witness testified
    that ProMedica viewed St. Luke’s as a “[s]trong competitor”—strong enough that ProMedica
    offered at least one MCO a 2.5% discount off its rates if the MCO excluded St. Luke’s from its
    network. St. Luke’s management was also candid about the merger’s potential impacts on its
    No. 12- 3583      ProMedica Health Sys., Inc. v. Fed. Trade Comm’n             Page 17
    prices: its CEO stated that a merger with ProMedica “has the greatest potential for higher
    hospital rates” and would bring “a lot of negotiating clout.” The parties’ own statements,
    therefore, tend to confirm the presumption rather than rebut it.
    The same is true of testimony from the MCO witnesses. Those witnesses testified that a
    network comprising only Mercy and UTMC—the only other providers who would remain after
    the merger—would not be commercially viable because it would leave them with a “hole” in the
    suburbs of southwest Lucas County. (That no MCO has offered such a network during the past
    decade corroborates the point.) Consequently, the MCO witnesses explained, they would have
    no walk-away option in post-merger negotiations with ProMedica—and thus little ability to resist
    ProMedica’s demands for even higher rates. ProMedica responds that this testimony is self-
    serving, which might well be true (though one might construe ProMedica’s response as an
    implicit admission of the MCOs’ point). But ProMedica otherwise offers no reason to think the
    MCOs’ predictions are wrong—and the record offers plenty of reason to think they are right.
    ProMedica’s task, then, is to overcome not merely the presumption of anticompetitive
    effects, but also the statements of the merging parties themselves, and the MCOs’ testimony, and
    ProMedica’s failure to cite any efficiencies that would result from this merger. To that end,
    ProMedica argues that Mercy, rather than St. Luke’s, is ProMedica’s closest substitute—because
    Mercy, like ProMedica, offers tertiary services, whereas St. Luke’s does not. But any argument
    about substitutes must begin with a definition of the relevant market; and ProMedica’s argument
    is based upon a market definition that we have already rejected. That Mercy offers tertiary
    services, and St. Luke’s for the most part does not, matters only if the relevant market is one for
    a primary, secondary, and tertiary services wrapped together in a single package. That is not the
    relevant market here. See supra at 12-14. Instead, the relevant markets are those for GAC
    services and OB services, respectively—markets in which the merging parties’ own statements
    show that ProMedica and St. Luke’s are direct competitors. ProMedica’s argument is meritless.
    ProMedica also argues that MCOs, rather than patients, are the relevant consumers here,
    and that the Commission therefore erred by “assess[ing] substitutability from the patients’
    perspective.”   But this is an argument about semantics.           MCOs assemble networks based
    primarily upon patients’ preferences, not their own; and thus the extent to which an MCO
    No. 12- 3583      ProMedica Health Sys., Inc. v. Fed. Trade Comm’n            Page 18
    regards ProMedica and St. Luke’s as close substitutes depends upon the extent to which the
    MCO’s members do.
    Finally, ProMedica argues that St. Luke’s was in such dire financial straits before the
    merger that it “was not a meaningful competitive constraint on ProMedica.” This argument is
    known as a “weakened competitor” one, and is itself “probably the weakest ground of all for
    justifying a merger.” Kaiser Aluminum & Chem. Corp. v. FTC, 
    652 F.2d 1324
    , 1339 (7th Cir.
    1981). Courts “credit such a defense only in rare cases, when the [acquiring firm] makes a
    substantial showing that the acquired firm’s weakness, which cannot be resolved by any
    competitive means, would cause that firm’s market share to reduce to a level that would
    undermine the government’s prima facie case.” Univ. 
    Health, 938 F.2d at 1221
    . In other words,
    this argument is the Hail-Mary pass of presumptively doomed mergers—in this case thrown
    from ProMedica’s own end zone. The record demonstrates that St. Luke’s market share was
    increasing prior to the merger; that St. Luke’s had sufficient cash reserves to pay all of its
    obligations and meet its capital needs without any additional borrowing; and that, according to
    St. Luke’s CEO, “we can run in the black if activity stays high.” St. Luke’s difficulties before
    the merger provide no basis to reject the Commission’s findings about the merger’s
    anticompetitive effects.
    ProMedica has failed to rebut the presumption that its merger with St. Luke’s would
    reduce competition in violation of the Clayton Act. We therefore need not address ProMedica’s
    remaining criticisms of various other evidence that merely buttressed that presumption.
    D.
    ProMedica argues that the Commission erred in ordering divestiture as a remedy. We
    review the Commission’s choice of remedy for abuse of discretion. Jacob Siegel Co. v. FTC,
    
    327 U.S. 608
    , 611-12 (1946). In doing so, we resolve “all doubts” in the Commission’s favor.
    United States v. E.I. du Pont de Nemours & Co., 
    366 U.S. 316
    , 334 (1961).
    Once a merger is found illegal, “an undoing of the acquisition is a natural remedy.” 
    Id. at 329.
      Here, the Commission found that divestiture would be the best means to preserve
    competition in the relevant markets. The Commission also found that ProMedica’s suggested
    “conduct remedy”—which would establish, among other things, separate negotiation teams for
    No. 12- 3583      ProMedica Health Sys., Inc. v. Fed. Trade Comm’n         Page 19
    ProMedica and St. Luke’s—was disfavored because “there are usually greater long term costs
    associated with monitoring the efficacy of a conduct remedy than with imposing a structural
    solution.” And the Commission found no circumstances warranting such a remedy here. We
    have no basis to dispute any of those findings. The Commission did not abuse its discretion in
    choosing divestiture as a remedy.
    *     *     *
    The Commission’s analysis of this merger was comprehensive, carefully reasoned, and
    supported by substantial evidence in the record. The petition is denied.