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The approach taken here by Steward (Clemson U.), Hedge (U. of Florida), and Lester (late of Colorado State U.) to public policy studies is "evolutionary" in the sense that it goes beyond examining just the process and substance of public policy in the United States to explanation of how theoretical and empirical understandings of public policy have changed over the past several decades. The text is organized into four sections that discuss overall trends in the field of policy studies; shifting models for explaining agenda setting, policymaking, implementation, policy change, and other aspects of the policy cycle; the evolution and impact of education, welfare, and environmental policy in the United States; and applications of policy analysis inside and outside of government. Annotation c2007 Book News, Inc., Portland, OR (booknews.com)