Michael Thompson is director of the Musgrave Institute in London and honourary research fellow at the Department of Geography at University College London. Richard Ellis is assistant professor of political science at Willamette University. The late Aaron Wildavsky was professor of political science and public policy and a member of the Survey Research centre at the University of California at Berkeley. Michael Thompson is director of the Musgrave Institute in London and honourary research fellow at the Department of Geography at University College London. Richard Ellis is assistant professor of political science at Willamette University. The late Aaron Wildavsky was professor of political science and public policy and a member of the Survey Research centre at the University of California at Berkeley. Michael Thompson is director of the Musgrave Institute in London and honourary research fellow at the Department of Geography at University College London. Richard Ellis is assistant professor of political science at Willamette University. The late Aaron Wildavsky was professor of political science and public policy and a member of the Survey Research centre at the University of California at Berkeley. Michael Thompson is director of the Musgrave Institute in London and honourary research fellow at the Department of Geography at University College London. Richard Ellis is assistant professor of political science at Willamette University. The late Aaron Wildavsky was professor of political science and public policy and a member of the Survey Research centre at the University of California at Berkeley.