Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
This paper replicates Medoff and Abraham's [Medoff, J. and Abraham, K., 1980. Experience, performance, and earnings. Quarterly Journal of Economics 95, 703-736.] results where the introduction of performance ratings into an earnings equation doesn't reduce the coefficient on tenure. M&A interpret this as being worrying for Human Capital Theory. We offer an interpretation where it isn't.