Bookmaker and Pari-Mutuel Betting: Is a (Reverse) Favourite-Longshot Bias Built-In?
Authors: Koch, Alexander K.; Shing, Hui-Fai
Source: The Journal of Prediction Markets, Volume 2, Number 2, September 2008 , pp. 29-50(22)
Publisher: University of Buckingham Press
Abstract:
A widely documented empirical regularity in gambling markets is that bets on high probability events (a race won by a “favourite”) have higher expected returns than bets on low probability events (a “longshot” wins). Such favourite-longshot (FL) biases however appear to be more severe and persistent in bookmaker markets than in pari-mutuel markets; the latter sometimes exhibit no bias or a reverse FL bias. Our results help understand these differences: the odds grid in bookmaker markets leads to a built-in FL bias, whereas that used in pari-mutuel betting pushes these markets toward a reverse FL bias.Keywords: GAMBLING; FAVOURITE-LONGSHOT BIAS; BOOKMAKER BETTING; PARIMUTUEL BETTING; BREAKAGE; TICK SIZE
Document Type: Research article
Publication date: 2008-09-01
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