I. The production function, 108. — II. What the variables represent, 112. — III. The years and industries selected for study, 113. — IV. Statistical argument, 116. — V. Results for the four years, 117. — VI. Discussion of the model, 118. — VII. Comparison with the results of earlier work, 120. — VIII. (1) Comparison of observed and computed product, 121. — (2) Comparison of k and W/P, 125. — (3) Elasticity of demand for labor, 127. — IX. Conclusion, 128.

I. Earlier studies, 399. — Criticisms of these studies, 401. — Methods of meeting them, 402. — II. Assumptions underlying cross-section studies, 403. — The materials studied, 403. — III. The classical method, 406. — Frisch's method, 408. — Koopmans' method, 411. — IV. Values obtained for k and j, 414. — V. Analysis of averages per plant, 416. — VI. Probable flexibility and elasticity of the marginal productivity functions, 418. — VII. Analysis of labor's share, 419.