Unmeasured Variables in Linear Models for Panel Analysis

This chapter is a report from a project, Causal Models in Social Research, supported by NSF Grant GS-2707. J. Michael Coble was in charge of computer programing and Eugene Won assisted with the statistical work. Several of the models discu,ssed in the chapter were; suggested by remarks of Donald T. Campbell and David A. Kenny in informal communications, although they are not responsible for the use made of their suggestions.