the contribution of black players to the team's winning record. The results provide some evidence that the presence of black pitchers lowers the team's winning record. Playing time of hitters had no effect on wins. The results of an attendance regression reveal that there was customer discrimination in baseball. Although the result for hitter participation was statistically significant, the implications are inconsequential. Moreover, the level of customer discrimination is declining over time. Therefore, the hypothesis that a team owner faces a trade-off between wins and customer discrimination is not supported by the regression results. Finally, the results of the wage regression reveals an absence of negative wage differentials for black players relative to white players. The lack of salary discrimination in the relative absence of customer discrimination seems reasonable and confirms the outcomes predicted by Becker ( 1971).