ABSTRACT
The structure of industries is a key concept in both the fields of industrial organization and regional economics. Numerous theories present the relationship between structure and performance (see Caves, 1998; Mueller, 2003). Concentration measures, combined with measures of entry and exit, are the main structural characteristics used. A great deal of research has been done to show how industry structure changes over time through entry, exit and growth trajectories of firms and establishments. The concept of entrepreneurship is associated with these changes. Most of this research concerns the manufacturing sector in countries other than Sweden.
