Diskussionsbeiträge aus dem Institut für Wirtschaft und Verkehr 3/98
The paper shows that in a spatial price equilibrium under monopolisitc competition welfare can be increased by subsidising transport. Therefore transport can be said to exert a positive (pecuniary) externality. This is demonstrated by introducing a subsidy into a partial spatial price equilibrium of the Hotelling-Smithies type in one-dimensional space. Two varieties of demand are analysed, linear and negative exponential. The welfare effect of a transport subsidy is shown to be decomposable into three effects, the expansion effect, the competition effect and the market size effect. Numerical results and decompositions are presented.
transport externality spatial price equilibrium welfare.