抄録
The major objective of this paper is to demonstrate that interregional income differential is exogenous to interregional net migration, but not conversely. By use of the Japanese prefectural based data for 1954-82, we conduct two kinds of analyses to confirm this statement. Firstly, a simple comparison of the crests of interregional time-series plots was made to see which occurred first. Secondly, Sims' test of causality was done to investigate causation between rural/urban per capita income differential and rural/urban net migration.
