Informed voters and electoral outcomes: a natural experiment stemming from a fundamental information-technological shift

Do informed electorates choose better candidates? While that question is straightforward, its answer often is elusive. Typically, candidate-quality information is neither salient nor subject to exogenous change. We identify a natural experiment within a non-political election setting that is transparent and features exogenous change in the candidate-quality information frontier. The setting is Major League Baseball’s (MLB) annual selection of two most valuable players, a challenging environment with an innately heterogeneous candidate set, and the exogenous change is the development of the pathbreaking, comprehensive player-value measure Wins Above Replacement (WAR) in 2004 and its subsequent calculation for all retrospective MLB player-seasons. WAR's development and rapid popularization informed voting from 2004 onward. Retrospective calculation allows us to draw back the curtain and evaluate how pre-2004 voters behaved with respect to revealed candidate quality. From negative binomial, fixed-effect regression models, we find robust evidence of significant, substantial, pivotal behavioral change on the part of voters since 2004.