1 Introduction
2 Theoretical framework for measuring labor input
2.1 Measurement of total factor productivity and Divisia index
2.2 Measurement of the quality change in labor input
2.3 Decomposition of quality change in labor input
3 Data compilation
4 Empirical results
4.1 Sources of economic growth in Japan
4.2 Annual growth of sectoral labor input
4.3 Decomposition of quality change in labor input in manufacturing sector
4.4 Decomposition of quality change in labor input in service sector
4.5 Quality change in labor input and economic growth
4.6 Comparison of quality change in labor input betweent Japan and the U.S.