The aim of this study is to formulate simple models for in-, out-, and net-migration flows among regions and to test such models by using time series data from two Finnish regions. The formulations begin with human capital theory, emphasizing economic factors such as incomes and employment possibilities as a means for explaining migration patterns. Human capital theory includes many more aspects than just those related to migration. For this study, however, only the factors relevant to migratory flows will be dealt with in depth. The developed basic models are made suitable for empirical time series analysis, which is then carried out using time series data between 1962 and 1977 for the Pohjois-Karjala and Uusimaa regions.