Rodney J. Paul

This study extends the research on atmospheric conditions and scoring in sporting events by examining components of air density as it relates to National Football League (NFL) games. Statistically significant results were found in relation to the role of humidity in explaining the difference between actual scoring and the betting market total for NFL games. Simple wagering strategies based on humidity, wind speed, and a combination of these factors were shown to reject market efficiency. From game statistics, it appears that humidity may unexpectedly influence the rushing game, leading to...Read more

Bill M. Woodland and Linda M. Woodland

Sports betting markets continue to receive considerable attention from researchers regarding questions of market efficiency. The vast majority of papers have tested these markets with respect to the outcome of a single game. This article is the first to examine the National Basketball Association (NBA) season wins total over/under betting market. Woodland and Woodland (2013) investigated the analogous market for the National Football League (NFL), and found it to be sufficiently inefficient to provide bettors with profitable wagering opportunities. Betting rules are motivated by bettor...Read more

Rodney J. Paul
Andrew P. Weinbach
Chris Weinbach

A study of the physics of baseball has shown that air density plays a significant role in the distance a batted baseball will travel. Air density is a function of altitude, temperature, humidity, and barometric pressure. This paper tests if air density impacts the totals market in Major League Baseball by influencing the number of runs in a game above and beyond the betting market total. Through regression analysis and betting simulations of the 2012 season, it is shown that air density has an inverse relationship with total runs scored and simple betting strategies are constructed that...Read more

Brad R. Humphreys
Rodney J. Paul
Andrew P. Weinbach

Betting strategies based on the presence of home-underdog bias in the NFL have been shown to produce returns in excess of those predicted by market efficiency in some situations. Dare and Dennis (2011) attribute this bias to bettors underestimating the scoring ability of home underdogs. Using a more recent sample of data, we find contradictory results. We challenge the assumptions of the Dare and Dennis (2011) model and use detailed betting data to offer an alternative rationale for the homeunderdog bias. We illustrate that bettors have clear and predictable tendencies for betting on the...Read more

Richard John Ryall
Anthony Bedford

This paper examines the efficiency of the “in-play” Australian Rules football fixed odds betting market at quarter time, half time, and three quarter time. Tests of semi-strong efficiency are performed on the 2009 AFL season using logistic regression analysis. The results demonstrate that as the match progresses, there is a significant bias against the team that is currently leading—a bias that increases when the team that is leading is also the away-favorite. This bias is shown to yield significant profits utilizing simple betting strategies.Read more

Rodney J. Paul
Andrew P. Weinbach
Richard Borghesi
Mark Wilson

Betting market odds for Major League Baseball are used to examine the level of uncertainty of outcome, an ex-ante form of competitive balance. The efficient markets hypothesis cannot be rejected for the years 1990-2006 in Major League Baseball. Therefore, the odds provide an ex-ante measure of the uncertainty of outcome of baseball games in the minds of fans and bettors. The odds for both the American and National Leagues were shown to increase during the 1990s, implying more certainty in the expected outcome of the game. Bettors and fans believed favorites in Major League Baseball were...Read more

John Goddard
Stuart Thomas

An assessment is made of the efficiency of four UK high street bookmakers?betting odds for the 2004 European football (soccer) championships, based on an analysis of match results data from 15 previous international tournaments. Pre-tournament probabilities for the outright winners of Euro 2004 are generated using Monte Carlo simulations. There is no evidence that the bookmakers underestimated the win probability of the pre-tournament outsiders and ultimate winners, Greece. However, the odds quoted for bets on the host nation team, Portugal, appear to understate the importance of home...Read more