Innovation is often predicated on discovering useful new combinations of existing knowledge in highly complex knowledge …, and particle physics. We develop a combinatorial-based knowledge production function and embed it in the classic Jones …. This production function is a generalization (and reinterpretation) of the Romer/Jones knowledge production function …

The pace of innovation is related both to the level of investment in innovation and the pool of knowledge from which … innovators can draw. Both of these are endogenous: Investments in innovations are affected by the pool of knowledge and the … and design of IPR affects the extent to which any innovation adds to or subtracts from the pool of ideas that are …

information. We also find that the relative importance of knowledge sources varies systematically with the type of innovation … organization that one of the main drivers of differences in productivity is differences in knowledge. We examine a new data set of … detailed measures of knowledge outputs, knowledge investments, and sources of existing knowledge. We find that globally engaged …

knowledge accumulates as technology progresses, then successive generations of innovators may face an increasing educational … negative implications for growth. I develop a formal model of this "knowledge burden mechanism" and derive six testable … sufficiently rapid increase in the burden of knowledge. In cross-section, the model predicts that specialization and teamwork will …