present a multicountry model of technological innovation and diffusion which has the implication that, for a wide range of …

opportunities. The paper also provides new evidence on induced pharmaceutical innovation. In both cases we use the change in the … demographic structure of the market (measured by age structure and obesity prevalence) to test the induced innovation hypothesis … pharmaceutical innovation responds to aging- and obesity-induced changes in potential market size …

U.S. agriculture was transformed during the 20th century by waves of innovation with mechanical, biological, chemical … innovation will be required to preserve past productivity gains in the face of climate change, coevolving pests and diseases, and … changing technological regulations—let alone increase productivity. Great potential exists for innovation in crop and livestock …