I. The general framework, 220. — II. Productivity changes and nonlabor income, 225. — III. Overtime, 227. — IV. The effect of training, 228. — V. Minimum wage and wage ceiling, 230. — VI. Some aspects of market demand and supply, 233. — VII. Concluding remarks, 234. — Appendix, 234.

Because commodities as transacted are complex, tax statutes could not cover all margins subject to optimization. A tax will induce, then, substitution within the commodity away from the taxed attributes and into the others. The results of a test on cigarettes are consistent with our prediction that the effects of unit and ad valorem taxes will differ both from each other and from those predicted by the conventional model. It is shown that, although the market will adjust in numerous changeable characteristics, the adjustment is constrained by the condition that the sum of the dollar value of the inefficiencies and of tax paid is minimized.

There are many economic activities where the cost function can be approximated by a fixed initial cost and a constant (sometimes zero) marginal cost as with book publishing, public utilities, and innovations. In the absence of technical advance, an economy that grows in scale could nevertheless exhibit growth in per capita income by taking advantage of the economies of scale afforded. To the extent, however, that these production processes are in the public domain, overinvestment, manifested either in premature entry or in duplication of resources, will occur, and the growth potential, to a large extent, will be lost.