We study empirical patterns in investment behavior using a comprehensive data set of defined contribution plans. Using plan-level portfolio allocation data for the near universe of 401(k) plans over the period 2009-2019, we document substantial differences in investment behavior across plans....

Abstract We use a revealed-preference approach to estimate investor expectations of stock market returns. Using data on demand for index funds that follow the S&P 500, we develop and estimate a model of investor choice to flexibly recover the time-varying distribution of expected returns. Our...