University of Hawai`i at Mānoa Department of Economics Working Paper Series Saunders Hall 542, 2424 Maile Way, Honolulu, HI 96822 Phone: (808) 956 -8496 www.economics.hawaii.edu Working Paper No. 14-11 Does Versatility Matter in Match-Play Sports? Evidence from Sumo Wrestling By Sang-Hyop Lee Sumner La Croix March 2014 Does Versatility Matter in Match-Play Sports? Evidence from Sumo Wrestling Sang-Hyop Lee Department of Economics, University of Hawaii at Manoa E-mail:
[email protected] Tel: 808-956-8590 Sumner La Croix Department of Economics, University of Hawaii at Manoa E-mail:
[email protected] Tel: 808-956-7061 Version: 30 March 2014 Keywords: sumo, match play, tournament, belief learning Abstract: In match-play sports, the best players seem to be both versatile and unpredictable in their use of techniques during play. Our analysis extends empirical work on player versatility and unpredictability to the Japanese sport of sumo wrestling. While earlier studies of tennis serves and football penalty kicks were motivated by game-theoretic analysis of choices made by players to start a match, our study is motivated by labor market theories that tie the success of workers to their portfolio of skills and its application to particular situations. We analyze panel data on tournament records of top sumo wrestlers participating in Japan’s grand sumo tournaments over the 1995-2004 period to test whether players with better physical attributes and a balanced, unpredictable portfolio of winning techniques are more likely to win matches. Our econometric results show that better physical attributes, a diverse portfolio of techniques to finish a match, and unpredictable use of techniques are all associated with more wins per tournament.