the properties of the logistic regression of the N ×M array of "i-buys-j" purchase decisions, [Yij ] 1≤i≤N,1≤j≤M, onto … term is asymptotically negligible. Asymptotic normality of the logistic regression coefficients is shown using a martingale …, it specializes to recently derived results on the behavior of logistic regression with rare events and iid data. Sparse …