I. The industry, 406. — II. The process of innovation, 409. — III. A theory of innovation, 415

Introduction: the “Schumpeterian” hypothesis, 167. — I. Oxygen steelmaking: the history of its invention and innovation, 169. — II. Some cost and profit implications of innovative lethargy, 184. — III. Conclusion, 188

I. The invention, 475. — II. The innovation: domestic lag, 475. — III. The innovation: international lag, 476. — IV. Explanation of the lag, 478. — V. Conclusion, 481

The theoretical literature on innovation has been concerned with a single innovation produced by a number of identical agents. By contrast, we consider a market in which one firm is the current incumbent, while the remaining firms are challengers. Moreover, we consider a sequence of innovations, so that success does not imply that the successful firm reaps monopoly profits forever after, but only until the next, better innovation is developed. We begin with a fully optimizing behavioral model and derive the equivalent of the Schumpeterian “process of creative destruction.” That is, a firm enjoys temporary monopoly power but is soon overthrown by a more inventive challenger. The essential point to grasp is that in dealing with capitalism we are dealing with an evolutionary process…The fundamental impulse that sets and keeps the capitalist engine in motion comes from the new consumers' goods, the new methods of production or transportation, the new markets, the new forms of industrial organization that capitalist enterprise creates [Schumpeter, 1942, pp. 82–83

I. Introduction, 221.—II. The sample of innovations, 222.—III. Estimation of social benefits: product innovations used by firms, 222.—IV. Parallel innovative efforts, time horizon, and rates of return, 226.—V. Product innovations used by households, 229.—VI. Process innovations, 231.—VII. Social and private rates of return, 233.—VIII. Factors associated with the gap between social and private rates of return, 235.—IX. Unemployment, repercussions on other markets, and future changes in technology, 238.—X. Conclusion, 239

Introduction, 596. — Innovation and technological change, 597. — Invention and innovation, 599. — Summary and conclusions, 605

I. Introduction, 417. — II. Industrial research and development: invention and innovation, 418. — III. Schumpeter's theory of innovation, 421. — IV. Conclusion: innovation a normal business procedure, 427

I. The inducement of innovations, 412. — II. Decision processes in the inducement of innovations, 415. — III. The adoption of new technologies, 422. — IV. The adjustment path of actual to latent demand, 424. — V. Induced innovations and Argentine agricultural development, 428

The paper analyzes the organization of the R&D activity in an incomplete contract framework. It provides theoretical foundations: (a) to understand how the allocation of property rights on innovations may affect both the frequency and the magnitude of these innovations; (b) to rationalize commonly observed features in research employment contracts, such as shop rights, trailer clauses, and the "hired for" doctrine; (c) to discuss the robustness of the so-called Schumpeterian hypotheses to endogenizing the organization of R&D; and (d) to provide a rationale for cofinancing arrangements in research activities

Introduction, 97. — I. The propensity to develop pure science, 98. — II. The propensity to invent, 102. — III. The propensity to innovate, 105. — IV. The propensity to finance innovation, 108. — V. The propensity to accept innovations, 110