This is a discussion of entry and the dynamics of market structure and performance that are associated with it. Much of the work is empirical and econometric results and case studies are used to evaluate theories of entry and explore possibilities of future research.

Each of these topics is explored using both case studies and econometric models drawn from a wide variety of countries and industries, and, in all three cases, a number of broad presumptions about the effects of entry emerge fairly clearly from the data.Although entry and exit are part of a process of net expansion or contraction in industry supply, the data make it plain that an interesting feature of the entry process is one of the selection between firms and the major or minor innovations that they bring to the market. The book concludes with a number of broader observations on market selection processes.

1. Introduction.
2. Entry Rates and Market Penetration.
3. Models of Entry.
4. Entry and the Short Run Dynamics of Prices and Margins.
5. The Empirical Analysis of Barriers to Entry.
6. Entry, Efficiency and Productivity.
7. Entry and Industry Evolution.