Productivity growth in Japan, as in most advanced economies, has moderated. This paper finds supportive evidence for the important role of small and medium-sized enterprises (SMEs) in explaining Japan’s modest productivity growth. Results show a substantial dispersion in firm-level productivity growth across sectors and even across firms within the same sector. SMEs, on average, exhibit lower productivity growth than non-SMEs in Japan, with smaller and older SMEs showing particularly low productivity growth. Estimates suggest that boosting productivity growth in all of the worst-performing SMEs could improve overall productivity growth by up to 1.8 percentage points. The SME credit guarantee system, SME financing constraints, demographic factors, and lack of intangible capital investment are discussed as contributors to the slow productivity growth of Japan’s small and old SMEs.

Emerging from the ruins of the Second World War, the Japanese economy has grown at double-digit rate throughout much of the 1950s and 1960s, and, when the oil crisis of the 1970s slowed growth throughout the industrialized world, Japanese growth throughout the industrialized world, Japanese growth rates remained relatively strong. There have been many attempts by scholars from a wide range of disciplines to explain this remarkable history, but for economists interested in the quantitative analysis of economic growth and the principal question addressed is how Japan was able to grow so rapidly. The contributors focus their efforts on the accurate measurement and comparison of Japanese and U.S. economic growth. Assuming that any sustained increase in real GNP must be due either to an increase in the quantity of capital and labor used in production or to the more efficient use of these inputs, the authors analyze the individual contributions of various factors and their importance in the process of output growth. These essays extend the methodology of growth analysis and offer many insights into the factors leading to the superior performance of the Japanese economy. They demonstrate that growth is a complex process and no single factor can explain the Japanese 'miracle.'