Author: Peter Bearman - CIAO Search Results

Author:: Peter Bearman and Paolo Parigi
Publication Date:: 09-2006
Content Type:: Working Paper
Institution:: Institute for Social and Economic Research and Policy at Columbia University
Abstract:: This article describes the impact of the Italian electoral reforms of 1993 on the structure of political alliances. The reform, which moved Italy from a pure proportional representation system to a mixed largely majoritarian system, was designed to increase transparency, reduce corruption, limit the number of political parties, and create the conditions for a politics of interests, rather than a politics of influence. Paradoxically, moving to a mixed electoral system had the opposite effect. In this article, the authors demonstrate this impact, by modeling the structure of political alliances at multiple levels (municipal, provincial, and regional) of the Italian polity from 1986 to 2001, from data on roughly 441,000 persons elected to serve in almost 3 million positions.
Topic:: Democratization, Political Economy, and Politics
Political Geography:: Europe and Italy

Author:: Peter Bearman and Delia Baldassarri
Publication Date:: 09-2006
Content Type:: Working Paper
Institution:: Institute for Social and Economic Research and Policy at Columbia University
Abstract:: This article accounts for two puzzling paradoxes. The first paradox is the simultaneous absence and presence of attitude polarization, the fact that global attitude polarization is relatively rare, even though pundits describe it as common. The second paradox is the simultaneous presence and absence of social polarization, the fact that while individuals experienced attitude homogeneity in their interpersonal networks, their networks are characterized by attitude heterogeneity. These paradoxes give rise to numerous scholarly arguments. By deploying a formal model of interpersonal influence over attitudes in a context where individuals hold simultaneous positions on multiple issues we show why these arguments are not mutually exclusive and how they meaningfully refer to the same social setting. It follows that the results from this model provide a single parsimonious account for both paradoxes. The framework we develop may be generalized to a wider array of problems, including classic problems in collective action.
Topic:: Politics, International Affairs, and Political Theory

Author:: Emily Erikson and Peter Bearman
Publication Date:: 12-2004
Content Type:: Working Paper
Institution:: Institute for Social and Economic Research and Policy at Columbia University
Abstract:: Drawing on a remarkable dataset compiled from ships' logs, journals, factory correspondence, ledgers, and reports that provide unusually precise information on each of the 4,572 voyages taken by English traders of the East India Company (hereafter EIC), we describe the EIC trade network over time, from 1601 to 1833. From structural images of voyages organized by shipping seasons, we map the (over time and space) emergence of dense, fully integrated, global trade networks: of globalization before globalization. We show that the integration of the world trade system under the aegis of the EIC was the unintended by-product of systematic individual malfeasance (private trading) on the part of ship captains seeking profit from internal Eastern trade.
Topic:: Economics, Globalization, and International Trade and Finance
Political Geography:: United Kingdom

Author:: Peter Bearman and Christopher Weiss
Publication Date:: 10-2004
Content Type:: Working Paper
Institution:: Institute for Social and Economic Research and Policy at Columbia University
Abstract:: Seemingly endless tinkering and adjustment of the structure of education in the United States over the past century has led to the adoption of different school forms at different times. Currently the middle school is the dominant form of schooling for the middle years of education; however, the middle school is a relatively new form that replaced the junior high school, which itself replaced previous schooling forms. Despite the rhetoric of policymakers and practitioners, little research has considered what school forms work for what kinds of adolescents across what dimensions. In this article, we show that for both academic and non-academic outcomes, how school systems structure the transition from 8th to 9th grade makes almost no difference. Where differences appear, they are small and point to the benefits of school transitions for providing fresh starts to adolescents in socially difficult situations. The policy implications are correspondingly clear: the optimal school structure for any school district is the one that maximizes building space, reduces crowding, and achieves administrative rationality.
Topic:: Development, Economics, and Education
Political Geography:: United States

Author:: Peter Bearman and Hannah Bruckner
Publication Date:: 10-2001
Content Type:: Working Paper
Institution:: Institute for Social and Economic Research and Policy at Columbia University
Abstract:: We consider social, genetic, evolutionary, and hormonal transfer hypotheses for same-sex romantic preferences of adolescent (N=5,552) sibling pairs drawn from a nationally representative sample. We show that male but not female opposite-sex twins disproportionately report same-sex attraction; and that the pattern of concordance of same-sex preference among siblings is inconsistent with a simple genetic influence model. Our results provide substantial support for the role of social influences, reject the hormone transfer model, reject a speculative evolutionary theory, and are consistent with a general model that allows for genetic expression of same-sex attraction under specific, highly circumscribed, social conditions.
Topic:: Gender Issues and Science and Technology

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