This research sheds light on the role of product scope on the innovation activity of multinational multi-product firms. We use patent citation data to break down innovation into two types by measuring the degree to which innovation performed by firms is fundamental and the extent to which the...

This study investigates the relationship between technological diversification and the productivity of firms' R&D. Using a panel dataset of U.S. manufacturing firms during the period of 1983-2002, we find the following: First, the firm-specific pool of knowledge spillovers has a non-linear...

The paper analyzes the impact of FDI on home and host countries, when firms compete both in the choice of international strategy and in R&D. A two-country, two-firm model is used. The problem is structured as a three-stage game in which firms must decide: the mode of foreign expansion; how much...