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    WhatYouNeedtoKnowAboutTwombly:TheUseandMisuseofEconomicandStatisticalEvidenceinPleadings

    DavidS.EvansUniversityofChicagoandUniversityCollegeLondon

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    What

    You

    Need

    to

    Know

    About

    Twombly:

    TheUseandMisuseofEconomicandStatisticalEvidenceinPleadingsDavidS.Evans1

    I.INTRODUCTIONnBellAtlanticv.Twombly2theSupremeCourtclarifiedwhatplaintiffsmustpleadfor theircomplaints topassmuster. Itretired theConley3 rule thatacourtshouldnot dismiss a complaint unless it appears beyond doubt that the plaintiff can

    provenosetoffactsinsupportofhisclaimwhichwouldentitlehimtorelief.Thenewrule isbasedonwhether thecomplaint statesasetof facts that,assuming their truth,

    makes it plausible that the plaintiff has a claimwhichwould entitle her to relief.Although Twombly involved an antitrust conspiracy claim,most commentators agree

    thatitmodifiedgeneralpleadingstandardsforallcasesandthathasbeenconfirmedin

    the Supreme Courts May 2009 ruling in Ashcroft v. Iqbal.4 Lower courts have citedTwomblymore than12,000 times inawide rangeofcases since itcamedown inMay

    2007.5These cases involveawideareaof claims including the fullgamutofantitrustcases.Defendantsnowroutinelyseektodismisscomplaintsonthegroundsthattheydonotstateaplausibleclaim.Thisarticleexploreswhatsortsofeconomicand statisticalevidencehelpestablishthataclaimisplausibleandwhatdonot.

    II.THETWOMBLYDECISIONTwombly concerned economic evidence of a conspiracy to restrain trade in

    violationofSection1oftheShermanAct.Theplaintiffs,ledbyWilliamTwombly,weresubscribersoflocaltelephoneandhighspeedInternetservices.Thedefendantswerethemajorregionaltelephonecompanies,includingBellAtlantic,whichlaterbecamepartof

    Verizon. The BabyBells, as they are sometimes called,were required to allow othertelephonecompaniestousetheirnetworksforvariouspurposes.Theplaintiffsclaimed

    1TheauthorwastheleadauthoroftheBriefbyAmiciCuriaeEconomistsinBellAtlanticv.WilliamTwomblywhich25leadingacademiceconomistssigned,seeinfranote8. HeisLecturer,UniversityofChicagoandExecutiveDirector,Jevons

    Institute

    for

    Competition

    Law

    and

    Economics,

    Visiting

    Professor,

    University

    College

    London.

    He

    would

    like

    to

    thankHowardChang,LubomiraIvanova,andDanielGarciaSwartzforveryhelpfulcommentsandMarinaDanilevsky

    forexcellentresearchassistance.2BellAtlanticCorp.v.Twombly,127S.Ct.1955(2007).3Conleyv.Gibson,355U.S.41(1957).4 OurdecisioninTwomblyexpoundedthepleadingstandardforallcivilactions,.,anditappliestoantitrust

    anddiscriminationsuitsalike.See,Ashcroftv.Iqbal,No.071015(U.S.S.Ct.May18,2009),at20,availableat

    http://www.supremecourtus.gov/opinions/08pdf/071015.pdf(lastaccessedJuly23,2009).ForfurtherdiscussionofIqbal,

    seeCarolineMitchell&DavidWallach,Ashcroftv.Iqbal: TakingTwomblyaStepFurther,7(2)GCPMAGAZINE(Jul09),availableathttp://www.globalcompetitionpolicy.org/index.php?&id=1780&action=907.

    5AsearchrunonLexisNexisonJuly23,2009turnedupmorethan12,000decisionswhichcitedTwombly.

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    thattheBabyBellsconspiredtokeepotherstelephonenetworksoutoftheirregionsand

    notentereachothersregions.Themainevidenceofthisconspiracywastheexistenceofparallelconduct:thatcompetitionwaslimitedinalltheregionsoftheBabyBellsand

    noneoftheBabyBellsofferedserviceintheterritoriesofanyoftheotherBabyBells.TheDistrictCourtdismissedthecomplaintonthegroundsthatparallelconduct

    wasnotenough.Theplaintiffsneeded evidence thattended toexclude independent

    selfinterestconductasanexplanation fordefendantsparallelbehavior.6TheSecond

    CircuitCourtofAppealssaid,inreversing,thatthecourtwouldhavetoconcludethat

    there is no set of facts that would permit a plaintiff to demonstrate the particular

    parallelismassertedwastheproductofcollusionratherthancoincidence.7Theproblemwith that conclusion,which follows from Conley, is that itwould permit conspiracy

    complaints against numerous firms in a wide range of settings. As a group of 25

    academic

    economists

    noted

    in

    their

    amicus

    brief,Virtuallyallfirmsintheeconomywillbeatriskunder[theparallelbehavioris

    enoughstandard]. Incumbentswillhavechangedprice inparallel inresponse

    todemandandcostchanges.Firmsmayhaveallloweredpricewhensignificant

    entryoccurred.Theywillhavereliedonthesameinformationandanalysisofthe

    same business conditions, to entermarkets, choose business locations, design

    products, invest in innovation, and make other decisions that affect market

    outcomesincludingnot availing themselvesofamyriadofpossiblebusiness

    opportunitiesandthereforetakingnoactionatall.8

    The Supreme Court agreed with this reasoning as well as with the concern

    expressedby thoseeconomists that theparallelbehavior isenough standardwould

    imposesignificantcostsontheeconomythroughunnecessarydiscovery,thesettlement

    of frivolous lawsuits, and the chilling of legitimate competitive behavior to avoid

    litigation.ItthereforeagreedwiththeDistrictCourtthataconspiracyclaimneedsmorethan just parallel behavior; it needs something to exclude routine competition as an

    explanation.

    Twombly would be mainly of interest to antitrust lawyers who specialize inconspiracycasesiftheSupremeCourthadendeditsanalysisthere.Infact,severalotherCircuit Courts of Appeal required plaintiffs to have more than parallel behavior to

    surviveamotiontodismissforaShermanSection1case.ButtheSupremeCourtusedtheopportunitytoreverseits1957decisioninConleywhichmanycourtshadreliedonto

    6BellAtlanticCorpvTwombly,supranote2,at5.7Id.at6.8Baumol,WilliamJ.,Boskin,MichaelJ.,Crandall,RobertW.,Elzinga,KennethG.,Evans,DavidS.,Faulhaber,

    GeraldR.,Fisher,FranklinM.,Froeb,LukeM.,Gilbert,RichardJ.,Joskow,PaulL.,Katz,MichaelL.,Milgrom,PaulR.,

    Moore,ThomasG.,Ordover,JanuszA.,Porter,RobertH.,Scherer,FredericM.,Schmalensee,Richard,Schwartz,Marius,

    Sibley,DavidS.,Smith,VernonL.,Snyder,EdwardA.,Spence,A.Michael,Spiller,PabloT.,Sykes,AlanO.,Teece,David

    J.&Whinston,MichaelD.,BriefofAmiciCuriaeEconomistsinSupportofPetitioners,BellAtlanticV.Twombly(April6,

    2006),at11, availableathttp://ssrn.com/abstract=1330591.

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    allowcomplaintstomoveforwardwithlittleifanyplausibleevidenceinthecomplaint

    that the plaintiff was entitled to relief. It thus changed the pleading standards foreffectively all Rule 8 federal cases, and hence the thousands of citations that have

    followedinthetwoyearssincethedecisioncamedown.9III.TWOMBLYMEETSREVERENDBAYES

    Professor Robert Bone has provided a way of looking at Twombly that helps

    identifywhatthecourtswilllookforinaplaintiffscomplaint.HearguesthatTwomblyrequires that theallegationsdescribeastateofaffairsthatdifferssignificantly froma

    baseline of normality and supports a probability of wrongdoing greater than the

    backgroundprobability forsituationsof thesamegeneral type.10Thisstandardhelpsexplain two Supreme Court decisions that some commentators have argued reflect

    ambiguityinwheretheCourthascomeoutonpleading.

    InSwierkiewiczv.SoremaN.A11theCourt,in2002,reversedalowercourtrulingthatdismissedacomplaintinanemploymentdiscriminationmatter.SwierkiewiczwasaHungarianemployeeofaFrenchcompanyintheUnitedStates.Thecompanyreplacedhim with a native French employee. The plaintiff provided details on the dates ofvariousactionsandthenationalitiesofcompanyemployeesthatmadevariousdecisions

    related tohim. Putting thesedetails aside, a French company replacing an employeewithaFrenchnativespeakerintheUnitedStateswouldappearfarenoughawayfrom

    thenormthatitwouldappearplausiblethatemployeecouldhaveavalidclaim.

    Fifteen days after issuing Twombly the Supreme Court, in William Erickson v.BarryJ.Pardusetal.12,reversedalowercourtdismissalofacomplaintbyaprisonerthathisconstitutionalrightshadbeenviolatedasaresultofthedenialofmedication.Totheconfusionof some readersofTwombly thecourtemphasized the importanceof liberalpleadingstandardsandnoted,citingTwombly,thataplaintiffisonlyrequiredtopresent

    a short and plain statement that he is entitled to relief. But in this case the plaintiff

    claimedthehehadstartedayearlongprogramforthetreatmentofHepatitisCandthat

    theprisondecidedtowithdrawitstreatmentfromhimeventhoughhewasinneedofit.(Duringtreatmentsforsomeoftheprisonersasyringehadbeenfoundinthetrashand

    9Rule8(a)(2)oftheFederalRulesofCivilProcedure,whichprovidesthegeneralrulesofpleading,requiresa

    complaint

    to

    provide

    a

    short

    and

    plain

    statement

    of

    the

    claim

    showing

    that

    the

    pleader

    is

    entitled

    to

    relief.

    See

    FED.

    R.

    CIV.P.8(A)(2). CasessubjecttomorestringentpleadingrequirementsthanRule8arelikelyunaffectedbyTwombly. Rule

    9(b),whichcoverspleadingrequirementsforcasesinvolvingfraudormistakes,statesaparticularityrequirementfor

    thepleadingsnotgenerallyapplicableunderRule8. Inaddition,therearecasesbroughtunderstatuteswithspecificand

    morestringentstatutorypleadingrequirements,suchasthePrivateSecuritiesLitigationReformAct(PSLRA)of1995. In

    addition,casesthatarebroughtprosealsogenerallyallowmorelatitudefortheplaintiffandmaynothavebeenaffectedbyTwombly.

    10RobertBone,Twombly,PleadingRules,andtheRegulationofCourtAccess67(BostonUniversitySchoolofLawWorkingPaperNo.0834,2008),availableathttp://www.bu.edu/law/faculty/scholarship/workingpapers/2008.html.

    11Swierkiewiczv.SoremaN.A.,534U.S.506(2002).12Ericksonv.Pardus,127S.Ct.2197(2007).

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    the prison officials concluded that it was used for dispensing illegal drugs. TheysuspectedErickson.)Itisunusualfordoctorstowithdrawtreatmentfrompatientswithseriousdiseases.ThusitwasplausiblethatEricksonhadavalidclaimforrelief.

    Common experience tellsus that the claims in Swierkiewicz andEricksonwereplausible.TheydescribedsituationsthatdifferedfromtheroutineenoughtomaketheSupremeCourtbelieve that therecouldbesomething there.A layobservermightsaythesamethingaboutTwombly.TheSupremeCourt,however,haslongexperiencewithantitrust conspiracy cases and hasmastered some economics through its analysis of

    antitrust matters. The Court was well aware that firms routinely act in parallel forpurely competitive reasons such as responding to changes in demand; and it has

    decidedfirmsdonotviolateSection1oftheShermanActevenwhentheyconsciously

    act inparallel tomaintainpricesandprofits.Theacademiceconomistswhosubmittedan

    amicus

    brief

    in

    support

    of

    reversing

    the

    Second

    Circuit

    emphasized

    these

    points

    as

    well.Section1requiresaconspiracywhich, inturn,entailscommunicationamongthefirms.Theplaintiffsthereforeneedfactsthat,takenastrue,would indicatethatsuchaconspiracywasplausible.Parallelbehaviordidnot,becauseitisnormalconductamongbusinessesinthesamemarket.

    Statistical theory provides a helpful way to think about the role of facts in

    meeting the Twombly plausibility standard. Reverend Thomas Bayes, an early 18thcenturymathematician, is the intellectual fatherofabranchofstatistics thatexamines

    howinformationchangesonesestimatesofwhethersomethingislikely.IfithadneversnowedinLosAngelesinJunemostpeoplewouldexpectthatitwouldnotsnowinLos

    Angelesthis

    coming

    June. If last June ithad snowed for the first timepeoplewould

    update theirpriorbeliefsandconclude that itwasat leastpossible that itcouldsnow

    thiscomingJune.

    The Supreme Courts plausibility test starts with the prior belief that before

    examiningthecomplainttheplaintiffdoesnothaveacauseofaction.Thepurposeofthecomplaintistoprovidefactsthat,takenastrue,wouldchangethatexpectationtosome

    degree.ThatisconsistentwiththeliberalpleadingstandardsreaffirmedinEricksontwoweeksafterTwombly.Thecourthastotakethefactsinthecomplaintastrue.Itthenhasto determine whether those facts move the needle from neutral (the plaintiff is no

    differentfromother individualsorbusinessesthatarenotentitledtorelief)topositive

    (theplaintiffhaspresentedsomefactsthatmakeitplausiblethatsheistitledtorelief).InTwomblytheparallelbehaviorevidencelefttheneedleonneutralwhilethefactspledinEricksonandSwierkiewiczmovedtheneedle intheplaintiffsdirection intheCourtsmind.IV.HOWFARMUSTPLAINTIFFSMOVETHENEEDLE?

    Ofcourseonemansplausibleisanothermansgivemeabreak.Thatleaves

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    thequestionofhowfarplaintiffsmustmovetheneedletofendoffamotiontodismiss.InTwomblytheplaintiffshadabitmorethanthebaldclaimofparallelbehavior,suchasa letter from aCongressman to theU.S.Department of Justice complaining about a

    conspiracyandanewspaperarticlethatquotedaBabyBellexecutiveinawaythatthe

    plaintiffsclaimedpointedtoaconspiracy.InSwierkiewiczonecouldarguethataFrenchcompany viewing a native French employee as better than an American (or an

    HungarianAmerican) is not so surprising. But in any event Twombly did not haveenoughforsevenoftheSupremeCourtJustices.

    Aninterestingquestioniswhetherhowfartheneedlemustmovedependson

    thecase.TheSupremeCourtexpressedaconcerninTwomblythatatoolenientpleadingstandard would unleash massive and expensive discovery and could result in a

    settlement just to avoid the costof anuisance case.TheBabyBellswouldhavebeensubject

    to

    discovery

    of

    information

    on

    their

    dealings

    with

    each

    other

    and

    with

    potential

    entrantsoveradecade.TheplaintiffssoughttocertifyaclassthatwouldincludealargeportionoftheAmericanpopulation.IfthecasesurvivedcertificationahardlyunusualeventforSection1casestheBabyBellswouldhavebeensubjecttomassivefinancial

    exposureandwouldhavelikelysettledeveniftheywerelikelytoprevailattrialoron

    appeal.(Theflipsideofthis isthatiftheplaintiffsdidhaveavalidclaimforreliefthedefendantsactionsprobablycausesubstantialongoingharm.)

    Whetherthecourtssaysoornot,onecanimaginethecourtsrequiringtheneedle

    tomovefarther inallowingacasetoproceedthatwill imposesubstantialcostsonthe

    defendant and the court system, thus resulting in settlement that isnotbasedon the

    merits,and

    demanding

    the

    needle

    to

    move

    less

    far

    in

    allowing

    acase

    to

    proceed

    that

    will not impose significant costs, or has other extenuating circumstances. BothSwierkiewicz and Erickson were singleplaintiff cases. William Erickson filed withoutcounseland theSupremeCourt insistedongreater latitudeforpleadings foramotion

    filedprose.V.MEETINGTHEPLAUSIBILITYTEST

    TwomblyandIqbalservenoticetoplaintiffsthatwhileashortplainstatementoftheircaseisallthatisneeded,thatstatementbettersaysomethingthatpersuadesacourt

    thattheplaintiffshaveaplausiblecase.Italsoprovidesaroadmaptodefendantswho

    wantashotatgettingacasetossedbeforerunningupsignificant legalbills.Economicand statistical evidence will often play a role in these considerations especially inantitrustandemploymentdiscriminationcases.

    VI.ANTITRUSTThe courts rely extensivelyon economic reasoning as reflected in the spate of

    SupremeCourtdecisions in the last fiveyears,especially thosecases involvingsingle

    firmconduct.Moderneconomicshasidentifiedcircumstancesinwhichitispossiblethat

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    business practices reduce consumer welfare, which is the touchstone of modern

    antitrust.But ithasalsodemonstrated thatmuchbehaviorthatwasviewedassuspectcanbeexplainedonthegroundsofeconomicefficiency.Courtsmaybemorereluctant,following Twombly, to allow antitrust complaints that do not plead something that

    wouldallowthecourttodistinguishanticompetitivefromprocompetitivebehavior.

    The plaintiff in Port Dock, for example, claimed that the defendants verticalintegration and subsequent refusal to dealwas anticompetitive.13 The SecondCircuitthought itwas possible that vertical integration could lead to a claim that deserved

    relief.Itnotedtheremaybe specialcircumstances inwhichamonopolistsverticalexpansion

    could be anticompetitive, such as where the monopolist uses the vertical

    integration to facilitatepricediscrimination, toavoidgovernmentregulationof

    priceat

    one

    level,

    or

    to

    preserve

    its

    production

    monopoly

    by

    putting

    up

    entry

    barrierstonewcompetitorsseekingtoenterattheproductionlevel.

    Buttheplaintiffhadnotpledanyfactstomaketheclaimplausible.InupholdingthelowercourtsdismissalofthisShermanSection2case,theSecondCircuitnotedthat

    theplaintifffailedtoallegeanysuchcircumstancethatwouldmake[thedefendants]

    vertical integrationand refusal todealwith itanticompetitive.To succeedwith theircomplaints,antitrustplaintiffsmuststartwithaviableanticompetitivetheoryandplead

    factsthatsupportit.Twombly andPortDock point to a general lesson.An antitrustplaintiff has to

    show that thedefendant engaged inpractices that firmsdonotordinarily engage in.Importantly, for Section 2 cases,modern economicshas shown thatmanypreviouslysuspectactsarecommonlyundertakenbycompetitivefirms.Itisnowwellknownthatfirmswithoutsignificantmarketpowerengageinpricediscrimination,tieandbundle,

    offerpricediscounts,andenter intoexclusivearrangements.Theydosobecause these

    practicesbenefittheircustomers,lowercosts,orsolveothereconomicproblemssuchas

    therecoveryoffixedcosts.Sincefirmswithoutmarketpowerengageinthesepractices,thefactthatafirmhasmarketpowerandengagesinthesepracticesshouldnotbyitself

    move the needle. As it was with the Baby Bell parallel behavior, conduct that isconsistentwithcompetitiveconductshouldnotbethebasisforrelief.

    A question is how far the courtswill go in allowing evidence of competitive

    conduct. The Supreme Court has recognized in Independent Ink14 that tying iscommonplace.Onecouldargue thataplaintiffpursuinga tyingclaimshouldhave toshownotonlythatthedefendanthasmarketpowerandengagedintyingbutalsothat

    there issignificantdemandtoofferthetyingproductseparatelyfromthetiedproduct

    and that its behavior does notmake economic sense.Theremay be other situations,13PortDock&StoneCorp.v.OldcastleNortheast,Inc.,507F.3d117(2dCir.2007).14IllinoisToolWorks,Inc.v.IndependentInk,Inc.,125S.Ct.2937(2005).

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    however,inwhichthecourtshavenotrecognizedthatcertainbehavioriscommonplace.It remains to be seen how far the courts will go in allowing defendants to submit

    evidenceatthemotiontodismissstageforexampleanaffidavitfromaneconomist

    thatthebehaviorisroutine.

    Antitrustplaintiffscanovercomethesehurdlesbypresentingplusfactorsthat

    movetheneedlesufficientlyfar.Economicscanhelphereaswell.Footnote4ofTwomblyevenprovided somepointers.Quoting thedefendantsbrief, theCourtnoted that theparties agreed thata conspiracywasplausiblewhen therewas evidenceof complex

    andhistoricallyunprecedentedchangesinpricingstructuremadeattheverysametime

    bymultiplecompetitors,andmadefornootherdiscerniblereason.15TheplaintiffsinInreGraphicsProcessingUnitsAntitrustLitigation16recoveredfromthegrantingofamotiontodismissby filing an amended complaint thatpointed to this sortof evidence.Thedistrict

    court

    let

    them

    through

    the

    gate

    the

    second

    time.VII.EMPLOYMENTDISCRIMINATION

    Statistical evidence is commonly used in employment discrimination cases,

    especiallythose thataredestined forclasscertification.Aswithantitrustcases thekeyquestion is whether plaintiffs have pled enough facts to make the claim for relief

    plausible.Twoexamples,onemadeupandtheotherreal,illustratehowTwomblyaffectstheuseofstatisticalevidenceforplaintiffsanddefendants.

    Consider a company thathas 50 regionaldistricts.A smallgroupofplaintiffs

    belonging toaprotectedminoritygroupargues that there isapatternandpracticeof

    discrimination against the minority group because, in the last 5 years, no minority

    promotions from thedistrictmanagerposition to thedivisionmanagerpositionhave

    takenplacein5districts.IsthisenoughinlightofTwombly?Alaypersonmightthinksoand thecourtshavepointed to theinexorablezero17asevidenceofnefariousgoings

    on.Toastatistician,however,thosefactsbythemselvesdonotmovetheneedleatall.Thefactthatthereare5districtswithnominoritypromotionscouldbeduetoa

    numberof factorsamong them, it isat leastpossible thatnopromotionswhatsoever

    weremade in somedistrictsand, furthermore,even if someweremade, it ispossible

    thatnominoritycandidatesforpromotionwereavailableatthetime.Plaintiffsshouldpresentenoughfactualevidencetodemonstrate,evenqualitatively,thatthattherewere

    enoughpromotions

    and

    enough

    minority

    candidates

    to

    make

    it

    likely

    that

    there

    would

    bestatisticallysignificantdisparities.Whenplaintiffsdonotpresentenoughevidence,thereisanopeningfordefendantstotheextentthestatisticalevidenceiscentraltothe

    complaint.

    15BellAtlanticCorpvTwombly,supranote2,footnote4at9.16InreGraphicsProcessingUnitsAntitrustLitig.,483F.Supp.2d1356(Jud.Pan.Mult.Lit.2007).17Teamstersv.UnitedStates,431U.S.324(1977).

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    Plaintiffsoftenpresentevidenceofgrossstatisticaldisparities intheworkforce

    compositionorwagedisparitiesaspartoftheircomplaint.Forexample,intheWalMartemployment litigation in theNinthCircuittheplaintiffspresentedevidenceofthe fact

    that twothirds ofWalMart employeeswere female but only onethird ofWalMart

    managerswere female. They interpreted this fact as evidence of discrimination. Thedistrictcourtcertifiedaverylargeclassofplaintiffs.TheNinthCircuitupheldtheclass

    onappeal.Amemberoftheappealspanel,JudgeKleinfeld,wroteadissentingopinionwhich echoed considerations that are importantpost Twombly.18Hepointed out thatplaintiffs statistics did not compare allwomenwhowanted to becomemanagers at

    WalMart with all men who wanted to become managers at WalMart. The one

    third/twothirds comparison just focused on allmale and female employees,whether

    theydesiredmanagement jobsornot.These sortsofgross statisticalcomparisonsdidnothaveanyimplicationforwhethertherewasorwasnotgenderdiscrimination.Inour

    language,theydidnotmovetheneedleintermsofplausibility.As a general matter, one could argue under Twombly that plaintiffs have to

    presentevidenceontheworkforcethatshowsthatdiscriminationinparticularpractices

    isplausible.Basedongenerallabormarketdataandexperience,thefactthatmanagerswerelesslikelytobewomenthanwereemployeesoverallshouldnotsurpriseus.Asof2000,womencomprised46.8percentofthecivilianlaborforcebutonly26.3percentof

    general and operational managers.19 Whether the particular breakdown at WalMart

    shouldsurpriseuswoulddependonthepreciseoccupationalmixandotherfactorssuch

    asthequalificationsforbeingastoreclerkversusbeingamanager.Evidencethatothersimilarretailershaveahigherproportionofwomeninmanagerialpositionswould,on

    the other hand, surprise us and make the claim of classwide discrimination more

    plausible.VIII.CONCLUSION

    Plaintiffshavetopresentfactsintheircomplaintthatmakeitplausiblethatthey

    are entitled to relief.Thatmeans stating facts that aredifferent enough from routinebehavior and that support the claim for relief. Lawyers should consider the use ofeconomicandstatisticalevidencecarefullyinfashioningtheircomplaintsandinseeking

    the dismissal of complaints. Disciplines such as economics and statistics provideframeworksforestablishingwhetherfactsarefarenoughawayfromneutraltomake

    itplausiblethattheplaintiffhasavalidclaim.

    18Dukesetal.v.WalMart,Inc.Nos.0416688,041672020079thCir.WL329022(Feb.6,2007).19U.S.BureauoftheCensus,2000.CalculatedusingtheEEODataTool.