It's Fourth Down and What Does the Bellman Equation Say? A Dynamic Programming Analysis of Football Strategy
(2723 K)
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NBER Working Paper No. 9024
Issued in June 2002
NBER Program(s): IO
This paper uses play-by-play accounts of virtually all regular season National Football League games for 1998-2000 to analyze teams' choices on fourth down between trying for a first down and kicking. Dynamic programming is used to estimate the values of possessing the ball at different points on the field. These estimates are combined with data on the results of kicks and conventional plays to estimate the average payoffs to kicking and going for it under different circumstances. Examination of teams' actual decisions shows systematic, overwhelmingly statistically significant, and quantitatively large departures from the decisions the dynamic-programming analysis implies are preferable.
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