On existence and stability of spatial equilibria and steady-states

This note discusses the existence and stability of two equilibrium concepts for a spatial economy in which the utility of an agent depends on the overall distribution of agents over space.     

Direct regression,reverse regression,and covariance structure analysis

This paper discusses the issues in estimating the effects of marketing variables with linear models. When the variables are not directly observable, it is well known that direct regression yields biased estimates. Several researchers have recently suggested reverse regression as an alternative procedure. However, it is shown that the reverse regression approach also fails to provide unbiased estimates in general, except for some special cases. It is proposed that covariance structure analysis with an appropriate measurement model can ensure the unbiasedness of estimated effects. These issues are examined in the context of assessing market pioneer advantages. The authors thank the editor and the two anonymous reviewers for their helpful comments on the previous version of this paper.