Sources of Change in Rates of Return on Capital: 1952-82
重新审视资本回报率下降问题，重点在于识别和量化回报率变化的来源，而非提供更精确的数值估计。
A reconsideration of the problem of a declining rate of return on capital. The emphasis is not on providing better numerical estimates of rates of return, but rather on identifying and quantifying the sources of change in the rates.