Between 1961 and 1985, the annual domestic patent application count in the U.S. varied within a narrow range of 59,000 and 72,000. Patent applications have risen dramatically in the last decade by 70 percent, reaching 124,000 in 1995. Patents granted have risen commensurately. In this paper, we...

This paper proposes an endogenous growth model where human capital is the engine of growth and can be transferred across countries via costly foreign education. Importing advanced knowledge by students abroad can improve a developing country¡¯s chance of catching up with a developed host...

It has long been recognized that worker wages and possibly productivity are higher in large firms. Moreover, at least since Schumpeter (1942) economists have been interested in the relative efficiency of large firms in the research and development enterprise. This paper uses longitudinal...

Using an endogenous-growth, overlapping-generations framework where human capital is the engine of growth, we derive propositions concerning the evolution of income and fertility distributions and their interdependencies over three phases of economic development. In our model, heterogeneous...

We describe the construction of a panel data set from the U.S. patent data that contains measures of inventors?life-cycle R&D productivity--patents and patent citations. We match the data set to information on the U.S. pharmaceutical and semiconductor firms for whom they work. In this paper we...

Workers who are educated abroad acquire human capital specific to the country of foreign study (for example, language capital and country-specific knowledge on firm organization and on social system) which makes them more productive than domestically educated workers when both types of workers...

We develop and test a model of the patenting and R&D decisions of an innovating firm whose scientist-employees sometime quit to join or start a rival. In our model, the innovating firm patents to protect itself from its employees. We show theoretically that the risk of a scientist's departure...

Scholars may become journal editors because editors may generate more citations of their own works. This paper empirically establishes that a scholar's publications are more likely to be cited by papers in a journal that is edited by the scholar. We then test if editors exercise influence on...

Surveys often sample adults across a broad range of ages, measuring the same outcomes in several interviews spaced during a period of years and comparing the changes observed across segments of the adult life course. Put in sequence, those change vectors provide a composite image of the...