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Article

The Economics of Innovation, Knowledge Diffusion, and Globalization  

Nelson Lind and Natalia Ramondo

A recent body of literature on quantitative general equilibrium models links the creation and diffusion of knowledge and technology to openness to international trade and to the activity of multinational firms. The unifying theme of this literature is methodological: productivities are Fréchet random variables and arise from Poisson innovation and diffusion processes for ideas. The main advantage of this modeling strategy is that it delivers closed-form solutions for key endogenous variables that have a direct counterpart in the data (e.g., prices, trade flows). This tractability makes the connection between theory and data transparent, helps clarify the determinants of the gains from openness, and facilitates the calculation of counterfactual equilibria.

Article

Knowledge Spillovers, Trade, and Foreign Direct Investment  

Wolfgang Keller

This article explores knowledge spillovers, positive externalities that augment the information set of an economic agent, and reviews the evidence on such spillovers in the context of international economic transactions. The entry discusses trade channels of knowledge transfer associated with purchases from abroad (imports) and sales to abroad (exports). Another focus is on the foreign direct investment (FDI) channel through purchases from abroad (inward FDI) and sales to abroad (outward FDI). The entry also distinguishes knowledge flows from foreign to domestic agents and from domestic to foreign agents. The entry underlines the importance of empirical methodology and data characteristics that determine the quality of econometric identification. Even though spillovers are by their very nature—as externalities—difficult to identify, over recent decades a number of advances have produced robust evidence that both trade and foreign direct investment lead to sizable knowledge spillovers. These advances have been both conceptual as well as in the areas of empirical methodology and new data.