In2010700millionpeoplehuddledtogetherinfrontoftheirtelevisionsetstowatchtheWorldCupfinalbetweentheNetherlandsandSpain.Evenmoreareexpectedtotuneintothisyear'scontestwhichkicksoffonJune12thwithamatchbetweenBrazilandCroatiainSaoPaulo.Brazilaretherunawayfavouritestowinthetournamentwithbookmakersofferingoddsoflessthanthreetooneonthehometeamwinningthechampionship.ManyexpertsagreethatthecountrywillbenefitfromastronghomeadvantageaslocalcrowdsroarontheSeleqao.Howmuchdoesplayingonhometurffealtyaffectateam'sperformance?
Sportsscientistshavecomeupwithallsortsoftheoriestoexplainwhyplayingathomehelps.In2007astudyinvestigatedtheinfluenceofcrowdnoiseonrefereesintheEnglishfootballPremierLeague.Itshowedthatsomeweremorelikelytoflashyellowcardsandawardpenaltiesagainsttouringplayersthanthehostsbecausetheyreliedonthesplit-secondriseinthehomecrowd'sroarasaremindertodetermineifatackledeservedpunishment.InthemostrecentseasonoftheSpanishfootballRigatwo-thirdsofallpenaltykickswereawardedtothehometeam.
InthelatestEnglishfootballseasonthetop20clubsenjoyedahomesuccessrateof50%whiletheirvictoryrateontheroadwas32%.In12ofthepast19WorldCupsthehostnationhasmadeittothesemi-finalsandsixtimesithasgoneontowin.Theeffectcanbeseeninothersportstoo.ABeforethestartoftheLondonOlympicsin2012UKSportagovernmentagencystudiedtheresultsofmorethan100bigtournamentsacross14Olympicsports.BAsitturnedoutBritainbetteredits2008performancebywinning18moremedals(10ofthemgold)animprovementof38%.CAttheBeijinggamesChinawon59%moremedalsthanithaddoneatthe2004Athensgames.DRussiatoppedthemedaltableinSochi:inthepreviouswinterOlympicsithadcomesixth.
Giventhesenumbersitisnotsurprisingthatteamshavepouredmoneyintomaximizingtheirhomeadvantage.ForexampleBrazilhasspentaconsiderablefortuneonifsomewhatleisurelyaprogrammeofstadiumconstructionandrenovation.Inallitshomeadvantageisworththeequivalentofa0.6-goalheadstartineverymatchaccordingtoGoldmanSachsaninvestmentbank.LikemostothersGoldmanpredictsthatBrazilwilltrium