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Economic systems produce robust statistical patterns in key sate variables including prices and incomes. Statistical equilibrium methods explain the distributional proper- ties of state variables as arising from specific institutional and behavioral postulates. Two traditions have developed in political economy with the complementary aim of conceptualizing economic processes as irreducibly statistical phenomena but differ in their methodologies and interpretations of statistical explanation. These conceptual differences broadly mirror the methodological divisions in statistical mechanics, but also emerge in distinct ways when considered in the context of social sciences. This paper surveys the use of statistical equilibrium methods in analytical political economy and identifies the leading methodological and philosophical questions in this growing field of research.

Inequality of income and wealth has skyrocketed since the 1970s. As the super-rich have grasped the vast majority of the gains from economic growth, labor's share of income has declined. The middle class has stagnated, and those at the bottom have become even worse off. Persistent structural discrimination on the basis of race and gender exacerbates these economic disparities.The Great Polarization brings together scholars from disparate fields to examine the causes and consequences of this dramatic rise in inequality. Contributors demonstrate that institutions, norms, policy, and political power—not the "natural" operation of the market—determine the distribution of wealth and income. The book underscores the role of ideas and ideologies, showing how neoclassical economics and related beliefs have functioned in public debates to justify inequality. Together, these essays bear out an inescapable conclusion: inequality is a choice. The rules of the economy have been rewritten to favor those at the top, entrenching the imbalances of power that widen the gap between the very rich and everyone else.Contributors reconsider the data on inequality, examine the policies that have led to this predicament, and outline potential ways forward. Using both theoretical and empirical analysis and drawing on the knowledge of experts in policy, political economy, economics, and other disciplines, The Great Polarization offers a kaleidoscopic view of the processes that have shaped today's stark hierarchies