Volume One of the Classics of Comparative Policy Analysis, "Theory and Methods in Comparative Policy Analysis Studies" includes chapters that apply or further theory and methodology in the comparative study of public policy, in general, and policy analysis, in particular. Throughout the volume the chapters engage in theory building by assessing the relevance of theoretical approaches drawn from the social sciences, as well as some which are distinctive to policy analysis. Other chapters focus on various comparative approaches based on developments and challenges in the methodology of policy analysis. Together, this collection provides a comprehensive scholastic foundation to comparative policy analysis and comparative policy studies. "Theory and Methods in Comparative Policy Analysis Studies" will be of great interest to scholars and learners of public policy and social sciences, as well as to practitioners considering what can be learned or facilitated through methodologically and theoretically sound approaches. The chapters were originally published as articles in the Journal of Comparative Policy Analysis which in the last two decades has pioneered the development of comparative public policy. The volume is part of a four-volume series, the Classics of Comparative Policy Analysis including Theories and Methods, Institutions and Governance, Regional Comparisons, and Policy Sectors. Each volume showcases a different new chapter comparing domains of study interrelated with comparative public policy: political science, public administration, governance and policy design, authored by the JCPA co-editors Giliberto Capano, Iris Geva-May, Michael Howlett, Leslie A. Pal and B. Guy Peters.