ONCE AGAIN: TESTING FOR REGIONAL HOMOGENEITY*

ABSTRACT. Summarizing the foregoing discussions in this journal on testing for regional homogeneity the present note shows that in the model of Zellner's seemingly unrelated regressions one test statistic may be used not only to test for overall homogeneity but also to examine for individual coefficient homogeneity. This aim is achieved by varying the linear restrictions in the test statistic according to different problems. To illustrate these tests regional consumption functions for the 11 Bundesläder (States) of the Federal Republic of Germany are used.     

A NOTE ON INCOME TAXES AND DEGREE ONE PRODUCTION HOMOGENEITY*

ABSTRACT In a recent JRS article [Martinich and Hurter (1985)] we examined the production and spatial impact on a firm operating in an uncertain environment due to the imposition of a flat rate income tax. The impacts were shown to depend on the properties of the firm's production and preference functions. In this paper we develop further results for the case where the firm has a degree one homogeneous production function. It is shown that an income tax is technologically and spatially neutral for any risk-averse firm, without regard to any other properties of the preference function. Thus, we not only extend our earlier results for the degree one homogenous production function case but we also correct an error related to this case in the earlier paper.     

AN ECONOMIC INTERPRETATION OF KUHN'S DUAL FOR THE STEINER-WEBER PROBLEM A NOTE*

In this paper, we given an economic interpretation of Kuhn's dual of the Steiner-Weber problem. It depends essentially on the notion that different transportation systems arerelevant for the primal and the dual. Moreover, the Euclidean metric underlies the interpretation of the primal, the block one that of the dual.