An individual demand function is said to satisfy the finite basis property when its set of Engel curves has a finite spanning subset. In the present letter we discuss why this property underlies the theory of exact aggregation

This letter explores the robustness (in an approximating sense) of a class of demand systems which have been discussed by Gorman. This class is of fundamental interest because it is known to be the only class of demand systems which permits exact aggregation. We discuss the reasons which...

This letter explores some global properties of the Gorman class of demand functions. We find that generalizing the homothetic preferences case to non-homotheticity gives rise to an unexpected global problem. In particular, interaction of the bounded budget share condition with either Slutsky...

We address two problems in this paper: i) What restrictions, if any, need to be imposed on the vector of aggregates in order that the aggregate demand functional form representation be nontrivial, economically interesting and have the generalized Gorman form as its only solution. ii) What...

In this paper we explore the following fundamental question: Are there reasonable conditions under which the parameters of estimated aggregate demand systems will uniquely identify underlying individual demand systems? In the process of examining this question we show that the conditions which...

For decades, statistical methods, many based upon the “general linear model,” have been used to do estimation and test hypotheses in the social and natural sciences, in medicine, and in the private sector. These tools have become increasingly sophisticated and are often paired with powerful...

In this paper we construct four rather broad classes of theoretical models of criminal behavior and analyze the properties of each class. Our focus is on the testable hypotheses which arise from each class

In this paper we estimate the demand structure for refined lead over the time 1948-65. Special attention is focused on modeling the technological and institutional lags which prevent price changes from quickly impacting demand

This paper contrasts some of the differences in criminal choice model building as done by sociologists and as done by economists. Discussed are methodological differences, statistical differences (how causality is accounted for) and conceptual differences (the meaning and testing of the...

In this paper we show that plausible preference restrictions are not sufficient for unambiguous household supply results in the criminal choke problem. Therefore policy prescriptions in this area do not follow from theory, but rather require empirical determination of relative magnitudes