This book presents a simple geometric model of voting as a tool to analyze parliamentary roll call data. Each legislator is represented by one point and each roll call is represented by two points that correspond to the policy consequences of voting Yea or Nay. On every roll call each legislator votes for the closer outcome point, at least probabilistically. These points form a spatial map that summarizes the roll calls. In this sense a spatial map is much like a road map because it visually depicts the political world of a legislature. The closeness of two legislators on the map shows how similar their voting records are, and the distribution of legislators shows what the dimensions are. These maps can be used to study a wide variety of topics including how political parties evolve over time, the existence of sophisticated voting and how an executive influences legislative outcomes.

With recent advances in computing power and the widespread availability of preference, perception and choice data, such as public opinion surveys and legislative voting, the empirical estimation of spatial models using scaling and ideal point estimation methods has never been more accessible.The second edition of Analyzing Spatial Models of Choice and Judgment demonstrates how to estimate and interpret spatial models with a variety of methods using the open-source programming language R. Requiring only basic knowledge of R, the book enables social science researchers to apply the methods to their own data. Also suitable for experienced methodologists, it presents the latest methods for modeling the distances between points. The authors explain the basic theory behind empirical spatial models, then illustrate the estimation technique behind implementing each method, exploring the advantages and limitations while providing visualizations to understand the results. This second edition updates and expands the methods and software discussed in the first edition, including new coverage of methods for ordinal data and anchoring vignettes in surveys, as well as an entire chapter dedicated to Bayesian methods. The second edition is made easier to use by the inclusion of an R package, which provides all data and functions used in the book. David A. Armstrong II is Canada Research Chair in Political Methodology and Associate Professor of Political Science at Western University. His research interests include measurement, Democracy and state repressive action. Ryan Bakker is Reader in Comparative Politics at the University of Essex. His research interests include applied Bayesian modeling, measurement, Western European politics, and EU politics. Royce Carroll is Professor in Comparative Politics at the University of Essex. His research focuses on measurement of ideology and the comparative politics of legislatures and political parties. Christopher Hare is Assistant Professor in Political Science at the University of California, Davis. His research focuses on ideology and voting behavior in US politics, political polarization, and measurement. Keith T. Poole is Philip H. Alston Jr. Distinguished Professor of Political Science at the University of Georgia. His research interests include methodology, US political-economic history, economic growth and entrepreneurship. Howard Rosenthal is Professor of Politics at NYU and Roger Williams Straus Professor of Social Sciences, Emeritus, at Princeton. Rosenthal’s research focuses on political economy, American politics and methodology.

The Oxford Handbook of Public Choice provides a comprehensive overview of the research in economics, political science, law, and sociology that has generated considerable insight into the politics of democratic and authoritarian systems as well as the influence of different institutional frameworks on incentives and outcomes. The result is an improved understanding of public policy, public finance, industrial organization, and macroeconomics as the combination of political and economic analysis shed light on how various interests compete both within a given rules of the games and, at times, to change the rules. These volumes include analytical surveys, syntheses, and general overviews of the many subfields of public choice focusing on interesting, important, and at times contentious issues. Throughout the focus is on enhancing understanding how political and economic systems act and interact, and how they might be improved. Both volumes combine methodological analysis with substantive overviews of key topics. This second volume examines constitutional political economy and also various applications, including public policy, international relations, and the study of history, as well as methodological and measurement issues. Throughout both volumes important analytical concepts and tools are discussed, including their application to substantive topics. Readers will gain increased understanding of rational choice and its implications for collective action; various explanations of voting, including economic and expressive; the role of taxation and finance in government dynamics; how trust and persuasion influence political outcomes; and how revolution, coups, and authoritarianism can be explained by the same set of analytical tools as enhance understanding of the various forms of democracy.

In Ideology and Congress, authors Poole and Rosenthal have analyzed over 13 million individual roll call votes spanning the two centuries since Congress began recording votes in 1789. By tracing the voting patterns of Congress throughout the country's history, the authors find that, despite a wide array of issues facing legislators, over 81 percent of their voting decisions can be attributed to a consistent ideological position ranging from ultraconservatism to ultraliberalism. In their classic 1997 volume, Congress: A Political Economic History of Roll Call Voting, roll call voting became the framework for a novel interpretation of important episodes in American political and economic history. Congress demonstrated that roll call voting has a very simple structure and that, for most of American history, roll call voting patterns have maintained a core stability based on two great issues: the extent of government regulation of, and intervention in, the economy; and race. In this new, paperback volume, the authors include nineteen years of additional data, bringing in the period from 1986 through 2004.

Debating how Canada compares, both regionally and in relation to other countries, is a national pastime. This book examines how political scientists apply diverse comparative strategies to better understand Canadian political life. Using a variety of methods, the contributors use comparison to examine topics as diverse as Indigenous rights, Canadian voting behaviour, activist movements, climate policy, and immigrant retention. While the theoretical perspectives and kinds of questions asked vary greatly, as a whole they demonstrate how the “art of comparing” is an important strategy for understanding Canadian identity politics, political mobilization, political institutions, and public policy. Ultimately, this book establishes how adopting a more systematic comparative outlook is essential – not only to revitalize the study of Canadian politics but also to achieve a more nuanced understanding of Canada as a whole.

Modern Methods for Evaluating Your Social Science Data With recent advances in computing power and the widespread availability of political choice data, such as legislative roll call and public opinion survey data, the empirical estimation of spatial models has never been easier or more popular. Analyzing Spatial Models of Choice and Judgment with R demonstrates how to estimate and interpret spatial models using a variety of methods with the popular, open-source programming language R. Requiring basic knowledge of R, the book enables researchers to apply the methods to their own data. Also suitable for expert methodologists, it presents the latest methods for modeling the distances between points—not the locations of the points themselves. This distinction has important implications for understanding scaling results, particularly how uncertainty spreads throughout the entire point configuration and how results are identified. In each chapter, the authors explain the basic theory behind the spatial model, then illustrate the estimation techniques and explore their historical development, and finally discuss the advantages and limitations of the methods. They also demonstrate step by step how to implement each method using R with actual datasets. The R code and datasets are available on the book’s website.

No legislature in the world has a greater influence over its nation's public affairs than the US Congress. The Congress's centrality in the US system of government has placed research on Congress at the heart of scholarship on American politics. Generations of American government scholars working in a wide range of methodological traditions have focused their analysis on understanding Congress, both as a lawmaking and a representative institution. The purpose of this volume is to take stock of this impressive and diverse literature, identifying areas of accomplishment and promising directions for future work. The editors have commissioned 37 chapters by leading scholars in the field, each chapter critically engages the scholarship focusing on a particular aspect of congressional politics, including the institution's responsiveness to the American public, its procedures and capacities for policymaking, its internal procedures and development, relationships between the branches of government, and the scholarly methodologies for approaching these topics. The Handbook also includes chapters addressing timely questions, including partisan polarization, congressional war powers, and the supermajoritarian procedures of the contemporary Senate. Beyond simply bringing readers up to speed on the current state of research, the volume offers critical assessments of how each literature has progressed - or failed to progress - in recent decades. The chapters identify the major questions posed by each line of research and assess the degree to which the answers developed in the literature are persuasive. The goal is not simply to tell us where we have been as a field, but to set an agenda for research on Congress for the next decade. The Oxford Handbooks of American Politics are a set of reference books offering authoritative and engaging critical overviews of the state of scholarship on American politics. Each volume focuses on a particular aspect of the field. The project is under the General Editorship of George C. Edwards III, and distinguished specialists in their respective fields edit each volume. The Handbooks aim not just to report on the discipline, but also to shape it as scholars critically assess the scholarship on a topic and propose directions in which it needs to move. The series is an indispensable reference for anyone working in American politics. General Editor for The Oxford Handbooks of American Politics: George C. Edwards III

A must-have resource for researchers, practitioners, and advanced students interested or involved in psychometric testing Over the past hundred years, psychometric testing has proved to be a valuable tool for measuring personality, mental ability, attitudes, and much more. The word ‘psychometrics’ can be translated as ‘mental measurement’; however, the implication that psychometrics as a field is confined to psychology is highly misleading. Scientists and practitioners from virtually every conceivable discipline now use and analyze data collected from questionnaires, scales, and tests developed from psychometric principles, and the field is vibrant with new and useful methods and approaches. This handbook brings together contributions from leading psychometricians in a diverse array of fields around the globe. Each provides accessible and practical information about their specialist area in a three-step format covering historical and standard approaches, innovative issues and techniques, and practical guidance on how to apply the methods discussed. Throughout, real-world examples help to illustrate and clarify key aspects of the topics covered. The aim is to fill a gap for information about psychometric testing that is neither too basic nor too technical and specialized, and will enable researchers, practitioners, and graduate students to expand their knowledge and skills in the area. Provides comprehensive coverage of the field of psychometric testing, from designing a test through writing items to constructing and evaluating scales Takes a practical approach, addressing real issues faced by practitioners and researchers Provides basic and accessible mathematical and statistical foundations of all psychometric techniques discussed Provides example software code to help readers implement the analyses discussed

With the European Parliament comprising politicians from many different countries, cultures, languages, national parties and institutional backgrounds, one might expect politics in the Parliament to be highly-fragmented and unpredictable. By studying more than 12,000 recorded votes between 1979 and 2004 this 2007 book establishes that the opposite is in fact true: transnational parties in the European Parliament are highly cohesive and the classic 'left-right' dimension dominates voting behaviour. Furthermore, the cohesion of parties in the European Parliament has increased as the powers of the Parliament have increased. The authors suggest that the main reason for these developments is that like-minded MEPs have incentives to form stable transnational party organizations and to use these organizations to compete over European Union policies. They suggest that this is a positive development for the future of democratic accountability in the European Union.