Exports, Product Differentiation and Knowledge Spillovers

Outsourcing and Knowledge Spillovers

Inspired by the theory of variety-expanding product innovation we derive a testable relationship of outsourcing on the growth rate of knowledge. We estimate this relationship with a firm-level dataset, which is a unique match of PATSTAT patent data and the Amadeus dataset. We find evidence that forward spillovers are stronger than backward spillovers, where forward spillovers are defined as spi...

Knowledge Spillovers from Research

We estimate the local spillovers from research university activity in a sample of urban counties. We use the fact that universities tend to follow a rigid endowment spending policy based on the market value of their endowments to identify the causal effect of university activity on labor income in the non-education sector. Our instrument for university expenditures is based on the interaction b...

Identifying technology spillovers and product market rivalry∗

The impact of R&D on growth through spillovers has been a major topic of economic research over the last thirty years. A central problem in the literature is that firm performance is affected by two countervailing “spillovers”: a positive effect from technological knowledge spillovers and negative business stealing effects from product market rivals. We develop a general framework incorporating...

The Influence of Spillovers, Product Differentiation and Entry on Technological Change

Knowledge spillovers in interdependent economies

In this paper, we improve upon Coe and Helpman’s model of international R&D spillovers, using seemingly unrelated regression (SUR) to include interdependence among national economies and allow for variations in coefficients across countries. We find that the impact of knowledge spillovers on national productivity is context dependent: positive in some cases while negative in others. From our in...