Qualitative methodology and comparative politics

Leading methods for pursuing qualitative research in the field of comparative politics are discussed. On one hand, qualitative researchers in this field use a variety of methods of theory development: procedures for generating new hypotheses, tools for pursuing conceptual innovation, and techniques for identifying populations of homogeneous cases. On the other hand, they employ both within-case and cross-case methods of theory testing. Within-case methods include techniques for identifying intervening mechanisms and testing multiple observable implications of theories. Cross-case methods include a host of approaches for assessing hypotheses about necessary and sufficient causes. The article discusses the distinctive leverage offered by qualitative research for addressing questions in comparative politics.