Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
We provide theory for calculating bounds on both the value of an individual[modifier letter apostrophe]s human capital and the return on an individual[modifier letter apostrophe]s human capital, given knowledge of the process governing earnings and financial asset returns. We calculate bounds using U.S. data on male earnings and financial asset returns. The large idiosyncratic component of earnings risk implies that bounds on values and returns are quite loose. However, when aggregate shocks are the only source of earnings risk, both bounds are tight.