Stability of Spatial Equilibrium*
研究了迁移动力学中空间均衡的稳定性条件，发现强拥堵不经济时均衡稳定，强集聚经济时不稳定，并证明了可忽略区域间外部性时稳定均衡的存在性，对俱乐部物品、地方公共物品和新经济地理学有参考价值。
Abstract. Asymptotic stability of equilibrium is often difficult to know when the number of variables exceeds four, since all eigenvalues of the Jacobian matrix are not analytically solvable. However, we obtain stability conditions for a general class of migration dynamics without computing eigenvalues. We show that a spatial equilibrium is stable in the presence of strong congestion diseconomies, but unstable in the presence of strong agglomeration economies. We also show existence of a stable equilibrium in the case of negligible interregional externalities, which is applicable to club goods, local public goods, and new economic geography.