Competition policy aims to prevent anticompetitive agreements and mergers, limiting the abusive exercise of market power. The formulation and application of this policy presents significant challenges, which include showing that proposed mergers are anticompetitive, proving that firms are...

We examine market structure and optimal commodity taxation in a world in which firms produce differentiated products and can exert some degree of market power. Building on Kay and Keen (1983), we model two forms of product technologies, two forms of market entry structures, and two forms of...

The rise of managed healthcare organizations (MCOs) and the associated increased integration among providers has transformed US healthcare and at the same time raised antitrust concern. This paper examines how competition among MCOs affects the efficiency gains of improved price coordination...

Builders merchants are an integral part of the construction industry, yet rarely are they consulted when discussions take place on the future of the construction industry. Throughout history, builders merchants have played a dominant role in the construction industry, initially as an...

This paper analyses mergers by Cournot firms producing differentiated products in a spatial market with product licensing by the merged firms. Product licensing allows the merged firms to co-ordinate their locations. If the degree of differentiation is not 'too low', a two-firm merger is more...

This paper presents an empirical assessment of movie-theatre attendance in two major metropolitan markets and provides strong support for the importance of spatial characteristics in determining attendance. We consider the hypothesis that attendance at a particular movie theatre reflects a...