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84:"We discount the chances of any party at 100/1 or bigger. The reverse of tweak 1 applies here. Almost all of these probably have effectively zero chance. Why don’t we just make them a bigger price? We don’t think we’ll take much extra money, certainly not enough to compensate us for the day we get it wrong." Matthew Shadwick, Ladbrokes, 2010-02-25. See
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of 2-to-1, and another 100-to-1, the true odds might for example be 1.5-to-1 and 300-to-1 respectively. Betting on the "longshot" is therefore a much worse proposition than betting on the favourite. In the long run, losing 5% by betting on the favourite, but losing 40% on longshots is not uncommon.
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Russell S. Sobel & S. Travis Raines, 2003. "An examination of the empirical derivatives of the favourite-longshot bias in racetrack betting," Applied
Economics, Taylor and Francis Journals, vol. 35(4), pages 371-385,
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is an observed phenomenon where on average, betters tend to overvalue "longshots" and relatively undervalue favourites. That is, in a horse race where one horse is given
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The phenomenon was first discovered by
Griffith. Various theories exist to explain why people willingly bet on such losing propositions, such as
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Methods such as the goto_conversion, Power and Shin can be used to measure the bias by converting betting odds to true probabilities.
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Convert
Betting Odds to Probabilities More Accurately and Efficiently than Shin and Power Methods
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behavior, risk-averse behavior or simply inaccurate estimation as presented by Sobel and Raines.
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