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Replik auf Jack Halperns Artikel über die Polarisierung in Rhodesien (The World Today, 27 (1971) 1. S. 1-8). (DÜI-Ker)

We study political polarization in a parliamentary setting dominated by strong parties. In addition to examining polarization along the left-right dimension, we consider political divergence between legislators belonging to the same political bloc. Are politicians' background characteristics unimportant when parties have powerful tools to discipline their rank-and-file? We investigate this question using legislative speech from the Norwegian Parliament and recently developed techniques for measuring group differences in high-dimensional choices. Across the background characteristics we consider — gender, age, urbanicity, and class background — we document substantial differences in speech, even when comparing legislators from the same party bloc and policy committee. Our results illuminate how individual legislators shape policymaking in party-centered environments.

Do party policy offerings simply reflect public opinion or do parties shape public demand for policies? Theories of party position-taking and the operation of democracy expect parties to track their supporters' positions, while scholarship of public opinion has shown voters often adopt the position of their preferred parties. We apply both of these theoretical expectations to the relationship between citizen polarization and party polarization and additionally argue that the relationship between them should be stronger among politically more engaged and sophisticated citizens. We draw on aggregated survey data from 174 cross-national and national election studies from 19 established democracies, to assess the extent to which citizen polarization responds to party polarization, the extent to which parties respond to changes in citizen polarization, and whether these relationships differ across different groups of citizens. We estimate seemingly unrelated error-correction models employing data on party and citizen positions from 1971 to 2019. Our findings suggest that citizen polarization follows party polarization and also that politically engaged and sophisticated citizens are more responsive to changes in party polarization than the politically less engaged and unsophisticated. In contrast, we find little evidence that party polarization responds to changes in citizen polarization.

"Extreme polarization in American politics - and especially in the U.S. Congress - is perhaps the most confounding political phenomenon of our time. This book binds together polarization in Congress and polarization in the electorate within an ever-expanding feedback loop. This loop is powered by the discipline exerted by the respective political parties on their Congressional members and district candidates and maintained by the voters in each Congressional district who must choose between the alternatives offered. These alternatives are just as extreme in competitive as in lop-sided districts. Tight national party discipline produces party delegations in Congress that are each ideologically narrowly distributed but widely separated from one another. As district constituencies become more polarized and are egged on by activists, parties are further motivated to move past a threshold and appeal to their respective bases rather than to voters in the political center. America has indeed acquired parties with clear platforms - once thought to be a desirable goal, but these parties are now feuding camps. What resolution might there be? Just as the progressive movement slowly replaced the Gilded Age, might a new reform effort replace the current squabble? Or could an asymmetry develop in the partisan constraints that would lead to ascendancy of the center, or might a new and over-riding issue generate a cross-cutting dimension, opening the door to a new politics? Only the future will tell"--

The aim of this article is the evaluation whether social and economic policy implemented after the Polish accession to the European Union led to a reduction in income disparities of households in Poland. Variations of those disparities were analyzed by assessing changes in the degree of economic polarization. In addition, changes in income inequality were evaluated. Analyses of changes in the degree of income polarization and income inequality of households in Poland were carried out for the years 2000—2014. In the analysis of the polarization process polarization indices were applied and changes in income inequality were analyzed using inequality coefficients.

1.Party polarization in the U.S. Congress --2.A brief history of party polarization --3.Explanations for party polarization --4.Redistricting --5.The political and geographic sorting of constituents --6.Extremism of party activists --7.Connecting constituency change to institutional change --8.The interaction in the legislative process --9.The link between the House and the Senate --10.Procedural polarization in the U.S. Congress.

AbstractAffective polarization, a concept that originated in the USA, has increasingly been studied in Europe's multi-party systems. This form of polarization refers to the extent to which party supporters dislike one another – or, more technically, to the difference between the positive feelings towards the supporters of one's own political party and the negative feelings towards the supporters of other parties. Measuring this gap in Europe's multi-party systems requires researchers to make various important decisions relating to conceptualization and measurement. Often, our focus could instead lie on assessing partisan hostility or negative party affect, which is easier to measure. While recent research on affective polarization in Europe has already taught USA lot, both about affective polarization and about political conflict in Europe, I nevertheless suggest that research in this field faces four challenges, namely developing better measures, more sophisticated theories, clearer accounts of affective polarization's importance and successful ways of reducing negative party affect, if this is indeed desirable.

Abstract
The comparative study of political polarization has been central to current debates on the global crisis of democracy. It has been built on uncertain conceptual foundations, though. Established uses of the concept lack a distinctive semantic core as multiple meanings compete against each other. On the basis of a broad reading of the comparative literature, I seek to circumscribe the use and reconstruct the core of political polarization as an instance of extraordinary democratic conflict. In a first step, I delineate the basic parameters of debate by distinguishing between cluster-analytic and conflict-analytic approaches and by specifying the generic type of political conflict that characterizes the polarization of democratic polities. In a second step, I argue for political intolerance as the defining trait of both ideological and social polarization. In a final step, I introduce a third, democratic dimension into the debate: the breakdown of basic democratic trust that leads actors to view their adversaries as "enemies of democracy." Such perceptions spell the end of democratic consolidation. When played among "democratic enemies," democracy stops being "the only game in town."