4MAHONEY E D.Return migration:A study of college graduates returningto rural U.S.homes[D].The University of Maine,2009:231.
5BUCHANAN R J.University student perceptions regarding agriculture andnames of agricultural faculties and departments of agribusiness[M].Uni-versity of Manitoba(Canada),2006.
6WINTERS J V.Wages and prices:Are workers fully compensated for costof living differences?[J].Regional Science and Urban Economics,2009,39(5):632-643.
7RAVALLION M,VAN DE WALLE D.Urban-rural cost-of-living differen-tials in a developing economy[J].Journal of Urban Economics,1991,29(1):113-127.
