Organizational Ecology is an exceptional book. It is at several points all exemplar of integrating formal theory with sophisticated empirical research... The future will look back to...the period when theory emerged to formalize the temporal component in the relationship between competition and formal organization. The key book in that long look will be Hannan and Freeman's Organizational Ecology. This is a book in which we can all take pride as sociologists.
   --Ronald S. Burt, American Journal of Sociology

Michael Hannan and John Freeman began one of organization theory's more acrimonious debates. Borrowing heavily from the biological literature on population ecology, Harman and Freeman argue that macrosocial processes play a major role in determining organizational success or failure, more so than managerial action... If you are interested in the debate, and you wish to be able to argue intelligently about the underlying issues, this is a good book to read.
   --Raymond F. Zammuto, Journal of Management

In the business of academic research, one often hears exhortations for the value of programmatic, long-term, longitudinal research, yet such instantiations are rare. Hannan and Freeman's volume stands as one of these uncommon examples...For any serious scholar of organizations and strategy it would make sense to study this book.
   --Jitendra V. Singh, Administrative Science Quarterly

Michael T. Hannan is Professor of Sociology, Stanford University.

John Freeman is Professor, Graduate School of Management, Cornell University.