This volume contains some important contributions to regional and urban economics made by Noboru Sakashita, one of the leading scholars in this field. The book deals with many interesting aspects of the field, among them topics on "industry location", "regional income inequality", "economics of multi-habitation", "agglomeration economies", "pricing of public transport service", and "urban growth". These practical topics are theoretically analyzed in rigorous fashion, but the theoretical analysis is complemented by empirical or numerical analysis so that the meaning of theoretical models can be fully understood.