Diagnostics for nonlinear L p

Abstract In this paper we propose diagnostics for nonlinear Lp-norm estimation. The basic idea is to replace the notion of likelihood displacement (Cook and Weisberg, 1982; Cook, 1986) by that of Lp-norm displacement. The general methods and diagnostics developed by Cook (1986) and Schall and Dunne (1988a, b, 1989) for the case of maximum likelihood estimation can then be extended to Lp-norm estimation.