The SAGE Handbook of Research Methods in Political Science and International Relations offers a comprehensive overview of research processes in social science - from the ideation and design of research projects, through the construction of theoretical arguments, to conceptualization, measurement, and data collection, and quantitative and qualitative empirical analysis - exposited through 65 major new contributions from leading international methodologists. Each chapter surveys, builds upon, and extends the modern state of the art in its area. Following through its six-part organization, undergraduate and graduate students, researchers and practicing academics will be guided through the design, methods, and analysis of issues in Political Science and International Relations: Part One: Formulating Good Research Questions and Designing Good Research Projects; Part Two: Methods of Theoretical Argumentation; Part Three: Conceptualization and Measurement; Part Four: Large-Scale Data Collection and Representation Methods; Part Five: Quantitative-Empirical Methods; Part Six: Qualitative and Mixed Methods.

Bayesian Ideal Point Estimation

Bayesian Ideal Point Estimation

Shawn Treier


Ideology is a fundamental concept of politics, and this is especially true of legislatures. The popular understanding is that a politician makes policy decisions based on their discernible ideology, with relative comparisons of these politicians easily placed in common conversation. This is consistent with an academic conceptualization of ideology as a set of constrained belief systems, represented geometrically by low-dimensional ‘basic spaces’ where legislators’ ideal positions in this space determine their observed stances on the concrete policy proposals they regularly face in legislative session. This characterization, best enunciated by Poole (2005), implies that the secret to understanding how a legislature operates is through the configuration of these ideal points in the basic ideological space, demanding empirical measurement. This invitation ...

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