I. Marginal productivity ignores important forms of investment, 627; and is inaccurate even for "productive" investment, 628.— The "law" of diminishing productivity vague and subject to serious exceptions, 630.— Marshall's doctrine of marginal net product does not explain general wages, 631; but throws light on the process of equilibrium-seeking, 632.— The application of labor to land, 633.— II. "Demand for labor" a misleading expression, 634.— Factors which determine it, 635.— The "method of increments" not involved, 638.— In what sense wages are residual, 639.— III. Practical implications: for changes in working hours, 640; consumer borrowing, 641; raising of wages above equilibrium rate, 642; elasticity of demand for labor, 643.

Introduction: doubts concerning stabilization of prices, 251. — Purchasing power reducible to labor, 254; with certain qualifications, 256. — The nature of monetary instability, 259. — Bad effects of it, 260. — True stability eliminates these, 263. — Basic labor standard superior to others in this respect, 265. — The debtor-creditor problem, 266. — No allowance for subjective side of labor, 267; or for changes in efficiency, 268. — The problem of detection, 269; of measurement, 274. — Practical considerations: production data alone an inadequate guide, 275; mild inflation easier to attain than stability, 277; corrective measures not always advisable, 279.

I. Introduction, 567. — II. The consumption use of savings, 569. — The commercial use, 573. — The production use, 575. — III. The yield schedules: scarcity-reducing investments, 578; — efficiency-increasing investments, 583. — Currency difficulties, 586. — IV. The combined schedule, 590. — Sale of rent bearers, 592. — Equalization of rates, 593. — "Productivity" 594. — V. The influence of interest on saving, 596. — Saving and other factors, 601. — VI. Conclusion, 603.

I. Cost not to be identified with entrepreneur expenses, 531. — Classification of costs, 532. — The objective factor in cost, 534. — II. Cost of production does not govern value, 535. — The function of cost of production, 539. — III. Cost of acquisition underlies demand, 540. — IV. Two factors in decline of price-offers for additional units, 542. — Marshall's objection to the second, 544. — The derived demand schedule, 545. — V. Apparent circuity of the value system, 546. — Multiple valuation the escape, 547. — VI. The value of scarcity-products, 549. — Three cases, 550. — VII. The influence of variations in the objective factors, 554. — Marshall's cost curves, 555. — VIII. Efficiency cost in using labor, 556. — Land, 557. — Professor Bye's reasoning, 558. — Savings, 559. — IX. Special relation of the entrepreneur to market values, 561. — The r61e of profits, 562.