Frank R. Baumgartner, Richard J. Richardson Distinguished Professor of Political Science, University of North Carolina at Chapel Hill, USAJoost Berkhout, Assistant Professor of Political Science, University of Amsterdam, The NetherlandsJan Beyers, Professor of Political Science, University of Antwerp, and Director of the Antwerp Centre for Institutions and Multilevel Politics (ACIM), BelgiumCaelesta Braun, Assistant Professor, Free University of Amsterdam, The NetherlandsTraci Burch, Associate Professor of Political Science, Northwestern University, and Research Professor at the American Bar Foundation, USAVirginia Gray, Robert Watson Winston Distinguished Professor of Political Science, University of North Carolina at Chapel Hill, USADarren Halpin, Associate Professor and Reader in Policy Studies, and the Head of School of Sociology, at the Research School of Social Sciences, the Australian National University. Marcel Hanegraaff, Post-Doctoral Researcher of Political Science, University of Antwerp, Belgium Thomas T. Holyoke, Associate Professor of Political Science, California State University, Fresno, USA Philip Edward Jones, Assistant Professor of Political Science and International Relations, University of Delaware, USABeth Leech, Professor of Political Science, Rutgers University, USABurdett Loomis, Professor of Politics, University of Kansas, USADavid Lowery, Bruce R. Miller and Dean D. LaVigne Professor of Political Science, Pennsylvania State University, USAWilliam A. Maloney, Professor of Politics and Head of the School of Geography, Politics and Sociology, Newcastle University, UKAnthony J. Nownes, Professor of Political Science, University of Tennessee, Knoxville, USAChristopher Witko, Associate Professor of Political Science, University of South Carolina, USAHye Young You, Assistant professor of Political Science, Vanderbilt University, USAKay Lehman Schlozman, J. Joseph Moakley Endowed Professor of Political Science, Boston College, USAKelsey Shoub, University of North Carolina at Chapel Hill, USASidney Verba, Carl H. Pforzheimer University Professor Emeritus and Research Professor of Government, Harvard University, USA

• List of Tables List of Figures Notes on Contributors 1.An Introduction to the Population Ecology Approach; David Lowery and Virginia Gray 2.Organizational Demography Research in the United States; Anthony J. Nownes 3.Interest Organization Demography Research in Europe; Joost Berkhout 4.Towards a Population Ecology Approach to Trans-National Advocacy? An Emerging Research Field; Jan Beyers and Marcel Hanegraaff 5.Challenges of Integrating Levels of Analysis in Interest Group Research; Thomas T. Holyoke 6.Organizational Populations: Professionalization, Maintenance and Democratic Delivery; William A. Maloney 7.Case Study Approaches to Studying Organization Survival and Adaptation; Christopher Witko 8.Lobbying as a Leveraged Act: On Resource Dependencies and Lobby Presence; Caelesta Braun 9.Louder Chorus - Same Accent: The Representation of Interests in Pressure Politics, 1981-2011; Kay Lehman Schlozman, Philip Edward Jones, Hye Young You, Traci Burch, Sidney Verba, Henry E. Brady 10.Interest Community Influence: A Neopluralist Perspective; Beth L. Leech 11.Population Dynamics and Representation; Frank R. Baumgartner and Kelsey Shoub 12.The Influence of Organization Ecology Research on Population Ecology of Interest Representation: Present Practices and Future Prospects; Darren R. Halpin 13.Beyond Metaphor: Populations and Groups, Interests, and Lobbyists; Burdett Loomis 14.The Future of Organization Ecology in Interest Representation; David Lowery, Virginia Gray and Darren R. Halpin Index

'The Organization Ecology of Interest Communities is one of the most important books on interest group systems ever written. The papers in this excellent volume represent that work's ever-expanding impact and chart new directions for population ecology research. Every student of interest groups will need to read this volume carefully.' Richard L. Hall, Professor of Political Science and Public Policy, University of Michigan, USA

Frank R. Baumgartner, Richard J. Richardson Distinguished Professor of Political Science, University of North Carolina at Chapel Hill, USAJoost Berkhout, Assistant Professor of Political Science, University of Amsterdam, The NetherlandsJan Beyers, Professor of Political Science, University of Antwerp, and Director of the Antwerp Centre for Institutions and Multilevel Politics (ACIM), BelgiumCaelesta Braun, Assistant Professor, Free University of Amsterdam, The NetherlandsTraci Burch, Associate Professor of Political Science, Northwestern University, and Research Professor at the American Bar Foundation, USAVirginia Gray, Robert Watson Winston Distinguished Professor of Political Science, University of North Carolina at Chapel Hill, USADarren Halpin, Associate Professor and Reader in Policy Studies, and the Head of School of Sociology, at the Research School of Social Sciences, the Australian National University. Marcel Hanegraaff, Post-Doctoral Researcher of Political Science, University of Antwerp, Belgium Thomas T. Holyoke, Associate Professor of Political Science, California State University, Fresno, USA Philip Edward Jones, Assistant Professor of Political Science and International Relations, University of Delaware, USABeth Leech, Professor of Political Science, Rutgers University, USABurdett Loomis, Professor of Politics, University of Kansas, USADavid Lowery, Bruce R. Miller and Dean D. LaVigne Professor of Political Science, Pennsylvania State University, USAWilliam A. Maloney, Professor of Politics and Head of the School of Geography, Politics and Sociology, Newcastle University, UKAnthony J. Nownes, Professor of Political Science, University of Tennessee, Knoxville, USAChristopher Witko, Associate Professor of Political Science, University of South Carolina, USAHye Young You, Assistant professor of Political Science, Vanderbilt University, USAKay Lehman Schlozman, J. Joseph Moakley Endowed Professor of Political Science, Boston College, USAKelsey Shoub, University of North Carolina at Chapel Hill, USASidney Verba, Carl H. Pforzheimer University Professor Emeritus and Research Professor of Government, Harvard University, USA

• List of Tables List of Figures Notes on Contributors 1.An Introduction to the Population Ecology Approach; David Lowery and Virginia Gray 2.Organizational Demography Research in the United States; Anthony J. Nownes 3.Interest Organization Demography Research in Europe; Joost Berkhout 4.Towards a Population Ecology Approach to Trans-National Advocacy? An Emerging Research Field; Jan Beyers and Marcel Hanegraaff 5.Challenges of Integrating Levels of Analysis in Interest Group Research; Thomas T. Holyoke 6.Organizational Populations: Professionalization, Maintenance and Democratic Delivery; William A. Maloney 7.Case Study Approaches to Studying Organization Survival and Adaptation; Christopher Witko 8.Lobbying as a Leveraged Act: On Resource Dependencies and Lobby Presence; Caelesta Braun 9.Louder Chorus - Same Accent: The Representation of Interests in Pressure Politics, 1981-2011; Kay Lehman Schlozman, Philip Edward Jones, Hye Young You, Traci Burch, Sidney Verba, Henry E. Brady 10.Interest Community Influence: A Neopluralist Perspective; Beth L. Leech 11.Population Dynamics and Representation; Frank R. Baumgartner and Kelsey Shoub 12.The Influence of Organization Ecology Research on Population Ecology of Interest Representation: Present Practices and Future Prospects; Darren R. Halpin 13.Beyond Metaphor: Populations and Groups, Interests, and Lobbyists; Burdett Loomis 14.The Future of Organization Ecology in Interest Representation; David Lowery, Virginia Gray and Darren R. Halpin Index

'The Organization Ecology of Interest Communities is one of the most important books on interest group systems ever written. The papers in this excellent volume represent that work's ever-expanding impact and chart new directions for population ecology research. Every student of interest groups will need to read this volume carefully.' Richard L. Hall, Professor of Political Science and Public Policy, University of Michigan, USA

Frank R. Baumgartner, Richard J. Richardson Distinguished Professor of Political Science, University of North Carolina at Chapel Hill, USAJoost Berkhout, Assistant Professor of Political Science, University of Amsterdam, The NetherlandsJan Beyers, Professor of Political Science, University of Antwerp, and Director of the Antwerp Centre for Institutions and Multilevel Politics (ACIM), BelgiumCaelesta Braun, Assistant Professor, Free University of Amsterdam, The NetherlandsTraci Burch, Associate Professor of Political Science, Northwestern University, and Research Professor at the American Bar Foundation, USAVirginia Gray, Robert Watson Winston Distinguished Professor of Political Science, University of North Carolina at Chapel Hill, USADarren Halpin, Associate Professor and Reader in Policy Studies, and the Head of School of Sociology, at the Research School of Social Sciences, the Australian National University. Marcel Hanegraaff, Post-Doctoral Researcher of Political Science, University of Antwerp, Belgium Thomas T. Holyoke, Associate Professor of Political Science, California State University, Fresno, USA Philip Edward Jones, Assistant Professor of Political Science and International Relations, University of Delaware, USABeth Leech, Professor of Political Science, Rutgers University, USABurdett Loomis, Professor of Politics, University of Kansas, USADavid Lowery, Bruce R. Miller and Dean D. LaVigne Professor of Political Science, Pennsylvania State University, USAWilliam A. Maloney, Professor of Politics and Head of the School of Geography, Politics and Sociology, Newcastle University, UKAnthony J. Nownes, Professor of Political Science, University of Tennessee, Knoxville, USAChristopher Witko, Associate Professor of Political Science, University of South Carolina, USAHye Young You, Assistant professor of Political Science, Vanderbilt University, USAKay Lehman Schlozman, J. Joseph Moakley Endowed Professor of Political Science, Boston College, USAKelsey Shoub, University of North Carolina at Chapel Hill, USASidney Verba, Carl H. Pforzheimer University Professor Emeritus and Research Professor of Government, Harvard University, USA

• List of Tables List of Figures Notes on Contributors 1.An Introduction to the Population Ecology Approach; David Lowery and Virginia Gray 2.Organizational Demography Research in the United States; Anthony J. Nownes 3.Interest Organization Demography Research in Europe; Joost Berkhout 4.Towards a Population Ecology Approach to Trans-National Advocacy? An Emerging Research Field; Jan Beyers and Marcel Hanegraaff 5.Challenges of Integrating Levels of Analysis in Interest Group Research; Thomas T. Holyoke 6.Organizational Populations: Professionalization, Maintenance and Democratic Delivery; William A. Maloney 7.Case Study Approaches to Studying Organization Survival and Adaptation; Christopher Witko 8.Lobbying as a Leveraged Act: On Resource Dependencies and Lobby Presence; Caelesta Braun 9.Louder Chorus - Same Accent: The Representation of Interests in Pressure Politics, 1981-2011; Kay Lehman Schlozman, Philip Edward Jones, Hye Young You, Traci Burch, Sidney Verba, Henry E. Brady 10.Interest Community Influence: A Neopluralist Perspective; Beth L. Leech 11.Population Dynamics and Representation; Frank R. Baumgartner and Kelsey Shoub 12.The Influence of Organization Ecology Research on Population Ecology of Interest Representation: Present Practices and Future Prospects; Darren R. Halpin 13.Beyond Metaphor: Populations and Groups, Interests, and Lobbyists; Burdett Loomis 14.The Future of Organization Ecology in Interest Representation; David Lowery, Virginia Gray and Darren R. Halpin Index

'The Organization Ecology of Interest Communities is one of the most important books on interest group systems ever written. The papers in this excellent volume represent that work's ever-expanding impact and chart new directions for population ecology research. Every student of interest groups will need to read this volume carefully.' Richard L. Hall, Professor of Political Science and Public Policy, University of Michigan, USA