Many US states have a single cutoff date for school entry, meaning that some children are older than others when they begin kindergarten. We show that this variation in birth months is associated with differences in adult labor market outcomes in the mutual fund industry. Relatively older managers (i.e., those born just after the cutoff) make better stock selections, and their funds outperform their younger peers’ funds by 0.48% per annum. This difference is linked to increased confidence. Survey respondents judge relatively older managers as appearing more confident in photographs, and these managers display more confident behavior: making larger bets, window dressing their holdings less, and securing more fund flows conditional on performance.

Abstract We examine the role of peer (e.g., Lipper manager indices) versus pure (e.g., S&P 500) benchmarks in fund manager compensation. We model their impact on manager incentives and then test those predictions using novel data. We find that 71% of managers are compensated based on peer benchmarks. Consistent with the model, peer-benchmarked fund managers exhibit higher effort generating higher gross performance and collect higher fee income. Analyzing advisors’ choice between benchmark types, we show that peer-benchmarking advisors cater to more sophisticated and performance-sensitive investors, and are more likely to sell through direct channels, consistent with investor heterogeneity and market segmentation.