This paper reviews recent studies on the links between competition, innovation and productivity growth in the long run. From a long-run perspective, one can see that gains from competition-enhancing regulatory reform are likely to exceed static gains observed in the short run since firms will...

Digital advertising, which uses consumer data to target ads to users, now accounts for most of global ad expenditures. Privacy concerns have prompted regulations that restrict the use of personal data. To inform these policy debates, we develop an equilibrium model of advertising and market...

This paper examines the extent of banking competition in African subregional markets. A dynamic version of the Panzar–Rosse model is adopted beside the static model to assess the overall extent of banking competition in each subregional banking market over the period 2002 to 2009. Consistent...

This paper reviews recent studies on the links between competition, innovation and productivity growth in the long run. From a long-run perspective, one can see that gains from competition-enhancing regulatory reform are likely to exceed static gains observed in the short run since firms will...

In this chapter we present the main characteristics and problems involved in the study of the arms trade: product definition and data, strategic aspects of the arms trade and regulation. We illustrate these aspects using the latest theoretical and empirical literature on arms trade. The papers...

This chapter surveys empirical models of market structure. We pay particular attention to equilibrium models that interpret cross-sectional variation in the number of firms or firm turnover rates. We begin by discussing what economists can in principle learn from models with homogeneous...