We analyse how the presence of a (private, small-scale) file-sharing community affects the profitability of producers of digital goods within a spatial duopoly model à la Hotelling (1929). Consumers can download pirated content by joining this file-sharing network. To gain access to the...

We analyze a location-choice model with two vertically differentiated firms and two regions with different consumer income. We find that the high-quality producer settles in the poor region and the low-quality one in the rich region when income disparities are sufficiently high and goods are...

A common assumption in the Schumpeterian growth literature is that the innovation size is constant and identical across industries. This is in contrast with the empirical evidence which shows that: (1) innovation size is not identical across industries and (2) the size distribution of profit...

Recent empirical evidence provided by Bernard et al. (2010) and Broda and Weinstein (2010) shows that a significant share of product creation and destruction in U.S. industries occurs within existing firms and accounts for an important share of aggregate output. In the present paper, and...

This research sheds light on the role of multinational production on the type of innovation performed by firms. We construct matched firm-patent data to measure the scope of innovation, that is the extent to which the output of R&D can be spread across different product lines. We focus on two...

We analyze a model of a vertically differentiated duopoly with two regions. These two locations differ for the market size or for the distribution of the willingness to pay for quality of their consumers. Firms sequentially choose to settle in one region and then simultaneously compete in...

Multi-product firms dominate production activity in the global economy. There is widespread evidence showing that large corporations improve their efficiency by increasing the scale of their operations; this objective can be realized either by consistently investing in R&D or by expanding the...

This note analyses the adoption and diffusion of innovations in a horizontally differentiated Cournot duopoly in which firms have to choose the dates for adopting a cost-reducing new technology like in Reinganum (1981a). We prove that product differentiation crucially matters in the diffusion...