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PARTIAL EQUILIBRIUM THEORY OF INTERREGIONAL TRADE AND THE GRAVITY MODEL
Author(s) -
Bröcker Johannes
Publication year - 1989
Publication title -
papers in regional science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.937
H-Index - 64
eISSN - 1435-5957
pISSN - 1056-8190
DOI - 10.1111/j.1435-5597.1989.tb01167.x
Subject(s) - gravity model of trade , economics , conformity , mathematical economics , work (physics) , general equilibrium theory , type (biology) , econometrics , microeconomics , geology , physics , international trade , thermodynamics , paleontology , political science , law
Gravity models of the constrained, unconstrained and elastically constrained type are interpreted as reduced forms of spatial price equilibrium of interregional trade. The explicit forms of equilibrium models reducing to the different varieties of gravity models are presented. They are theoretically consistent in the sense that the underlying demand and supply functions are compatible with individual optimising behaviour. Forms other than the gravity type, however, are consistent as well. No choice can be made by mere theoretical arguments. But additional criteria like computational facility and factual conformity provide good reasons for preferring gravity forms in applied work.