||"Functional Forms for Tractable Economic Model and the Cost Structure of International Trade"|
|| Fabinger, Michal and E. Glen Weyl|
Revised version of CIRJE-F-1028 (2016).
We present functional forms allowing a broader range of analytic solutions to common
economic equilibrium problems. These can increase the realism of pen-and-paper solutions or speed large-scale numerical solutions as computational subroutines. We use the latter approach to build a tractable heterogeneous firm model of international trade accommodating economies of scale in export and diseconomies of scale in production, providing a natural,unified solution to several puzzles concerning trade costs. We briefly highlight applications in a range of other fields. Our method of generating analytic solutions is a discrete approximation to a logarithmically modified Laplace transform of equilibrium conditions.