First, there is evidence that the favored team in a college basketball (and other sports) game likely to win but by less than the gambling point spread. This is consistent with point shaving. However, Dan Bernhardt (Illinois) and Steven Heston (Maryland) find similar patterns in favored team performance in games in which there is no incentive to point shave. They argue that "the data are better explained by strategic efforts to maximize the probability of winning." Read the paper.
Second, Michael Davis (Missouri Sci & Tech) and Christian End (Xavier) present evidence that NFL team success has "a significant positive effect on real per capita personal income" in the city in which the team is based. Read the paper.
Finally, David Forest, O. David Gulley, and Robert Simmons use data from one of Britain's largest bookmakers and data on public lotteries to show that lottery play is a substitute for "horse race, soccer and numbers betting." Read the paper.