Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
A measure of the relevancy of instruments used to estimate the coefficients of a linear multiple regression model is discussed. A method for computing the measure using only standard results from ordinary least squares and two-stage least squares estimation is described. The method is illustrated using an empirical example. © 1999 by the President and Fellows of Harvard College and the Massachusetts Institute of Technology