Factor Shares in the Long Term: Some Theoretical and Statistical Aspects

Stanley Lebergott, The Behavior of Income Shares: Selected Theoretical and Empirical Issues (Princeton University Press, 1964), chap. 2, https://www.nber.org/books-and-chapters/behavior-income-shares-selected-theoretical-and-empirical-issues/factor-shares-long-term-some-theoretical-and-statistical-aspects.