THE GEOGRAPHICAL, OCCUPATIONAL, AND INTERFIRM MOBILITY, AND THE FACTORS AFFECTING THESE MOVEMENTS FOR WORKERS IN FRANCE, ITALY, GERMANY, AND SWEDEN IN THE PERIOD SINCE THE SECOND WORLD WAR ARE STUDIED. DATA OBTAINED FROM INDUSTRIAL SURVEYS AND GENERAL CENSUSES WERE USED TO COMPARE THE FOUR COUNTRIES WITH EACH OTHER AND WITH THE UNITED STATES. INDUSTRIALIZED WESTERN EUROPE NOW EXPORTS LITTLE MANPOWER TO OTHER CONTINENTS AND, IN FACT, IMPORTS FOREIGN WORKERS FROM AFRICA OR MEDITERRANEAN EUROPE. THE INTERNAL MIGRATIONS IN THE UNITED STATES AND THE FEDERAL REPUBLIC OF GERMANY HAVE BEEN SIMILAR WITH SOMEWHAT LESS MIGRATION IN FRANCE AND ITALY. ALLOWING FOR THE DIFFICULTIES INHERENT IN INTERNATIONAL COMPARISONS, IT APPEARS THAT OCCUPATIONAL MOBILITY IS NO HIGHER IN THE UNITED STATES THAN IN THE EUROPEAN COUNTRIES. THE MOBILITY RATES BETWEEN FIRMS ARE SIMILAR IN GERMANY AND THE UNITED STATES, BUT SWEDEN HAS HIGHER AND ITALY AND FRANCE LOWER RATES THAN THE UNITED STATES AND GERMANY. FACTORS AFFECTING GEOGRAPHICAL MOBILITY WERE REGIONAL WAGE DIFFERENTIALS, REGIONAL DIFFERENCES IN UNEMPLOYMENT, AVAILABILITY OF HOUSING, AND CHANGE IN TRADE UNION ATTITUDES. THE APPENDIX PRESENTS 12 STUDIES OF SPECIFIC CASES OF LABOR MOBILITY IN FIRMS IN FRANCE, WEST GERMANY, AND ITALY. (HC)