Continued from page 1

“Can strong competition actually undermine a reward structure? A new study by Jennifer Brown of Berkeley provides an answer to this question by looking at the world of professional golf, with Tiger Woods playing the role of the strong competitor. …

“Analyzing data from round-by-round scores from all PGA tournaments between 2002 and 2006 (over 20,000 player-rounds of golf), Brown finds that competitors fare less well — about an extra stroke per tournament — when Tiger is playing. How can we be sure this is because of Tiger? … When Tiger is on, his competitors’ scores were elevated by nearly two strokes when he entered a tournament”

Joel Waldfogel, writing on “The Tiger Woods Effect,” Wednesday at