Growing polarization in the American Congress is closely related to rising income inequality. Yet there has been no corresponding polarization of the U.S. electorate, and across advanced democracies, mass polarization is negatively related to income inequality. To explain this puzzle, we propose a comparative political economy model of mass polarization in which the same institutional factors that generate income inequality also undermine political information. We explain why more voters then place themselves in the ideological center, hence generating a negative correlation between mass polarization and inequality. We confirm these conjectures on individual-level data for 20 democracies, and we then show that democracies cluster into two types: one with high inequality, low mass polarization, and polarized and right-shifted elites (e.g., the United States); and the other with low inequality and high mass polarization with left-shifted elites (e.g., Sweden). This division reflects long-standing differences in educational systems, the role of unions, and social networks.
AbramsS.IversenT.SoskiceD. (2011). Informal social networks and rational voting. British Journal of Political Science, 41, 229-257.
2.
AdamsJ. (2001). Party competition and responsible party government: A theory of spatial competition based upon insights from behavioral voting research. Ann Arbor: University of Michigan Press.
3.
AdamsJ.EzrowL. (2009). Who do European parties represent? How western European parties represent the policy preferences of opinion leaders. The Journal of Politics, 71, 206-223.
4.
AhlquistJ.LeviM. (2012). In the interests of others: Leaders, governance, and political activism in membership organizations. Princeton, NJ: Princeton University Press.
5.
AllanJ. P.ScruggsL. (2004). Political partisanship and welfare state reform in advanced industrial societies. American Journal of Political Science, 48, 496-512.
6.
AlvarezR. M.BrehmJ. (2002). Hard choices, easy answers. Princeton, NJ: Princeton University Press.
7.
AndersonC. J.BeramendiP. (2012). Left parties, poor voters, and electoral participation in advanced industrial societies. Comparative Political Studies, 45, 714-746.
8.
AnsellB. W. (2010). From the ballot to the Blackboard: The redistributive political economy of education. Cambridge, UK: Cambridge University Press.
9.
ArmingeonK.EnglerS.GerberM.LeimgruberP.BeyelerM. (2012). Comparative political data set 1960-2007. Bern, Switzerland: Institute of Political Science, University of Bern.
10.
BaumeisterR. F.LearyM. R. (1995). The need to belong: Desire for interpersonal attachments as a fundamental human motivation. Psychological Bulletin, 117, 497-529.
11.
BusemeyerM. R. (2014). Skills and inequality: Partisan politics and the political economy of education reforms in western welfare states. Cambridge, UK: Cambridge University Press.
12.
DownsA. (1957). An economic theory of democracy. New York, NY: Harper.
13.
FiorinaM. P.AbramsS. J. (2008). Political polarization in the American public. Annual Review of Political Science, 11, 563-588.
GentzkowM.ShapiroJ. M. (2010). What drives media slant? Evidence from US daily newspapers. Econometrica, 78, 35-71.
16.
GeorgiadisA.ManningA. (2012). Spend it like Beckham? Inequality and redistribution in the UK, 1983–2004. Public Choice, 151, 537-563.
17.
HarzingA.-W. (2006). Response styles in cross-national survey research: A 26-country study. International Journal of Cross Cultural Management, 6, 243-266.
18.
HuberE.StephensJ. D. (2001). Development and crisis of the welfare state: Parties and policies in global markets. Chicago, IL: University of Chicago Press.
19.
HuberE.StephensJ. D. (2014). Income inequality and redistribution in post-industrial democracies: demographic, economic, and political determinants. Socio-Economic Review, 12, 245-267.
20.
IversenT.SoskiceD. (2001). An asset theory of social policy preferences. American Political Science Review, 95, 875-893.
21.
IversenT.SoskiceD. (2010). Real exchange rates and competitiveness: The political economy of skill formation, wage compression, and electoral systems. American Political Science Review, 104, 601-623.
22.
IversenT.SoskiceD. (2012). Information, social networks and interest-based voting: Consequences for distributive politics (Welfare Societies Working Paper No. 06). Bremen, Germany: University of Bremen.
23.
IversenT.StephensJ. D. (2008). Partisan politics, the welfare state, and three worlds of human capital formation. Comparative Political Studies, 41, 600-637.
24.
KorpiW. (1983). The democratic class struggle. London, England: Routledge.
25.
KorpiW.ShalevM. (1979). Strikes, industrial relations and class conflict in capitalist societies. British Journal of Sociology, 30, 164-187.
26.
KristalT.CohenY. (2015). Labor market institutions and technology: The causes of rising wage inequality in US industries, 1968-2012. Social Science Research Network. Retrieved from http://ssrn.com/abstract=2549605
27.
LaaksoM.TaageperaR. (1979). Effective number of parties: A measure with application to West Europe. Comparative Political Studies, 12, 3-27.
28.
LarcineseV. (2005). Electoral competition and redistribution with rationally informed voters. Contributions to Economic Analysis and Policy, 4(1), 1-26.
29.
LaverM.BenoitK.GarryJ. (2003). Extracting policy positions from political texts using words as data. American Political Science Review, 97, 311-331.
30.
LewisJ. B.LinzerD. A. (2005). Estimating regression models in which the dependent variable is based on estimates. Political Analysis, 13, 345-364.
31.
McCartyN. M.PooleK. T.RosenthalH. H. (2006). Polarized America: The dance of ideology and unequal riches. Cambridge, UK: MIT Press.
32.
McDonaldM. D.MendesS. M.KimM. (2007). Cross-temporal and cross-national comparisons of party left-right positions. Electoral Studies, 26, 62-75.
33.
McPhersonM.Smith-LovinL.CookJ. (2001). Birds of a feather: Homophily in social networks. Annual Review of Sociology, 27, 415-444.
34.
MeltzerA. H.RichardS. F. (1981). A rational theory of the size of government. Journal of Political Economy, 89, 914-927.
35.
MoeneK. O.WallersteinM. (2001). Inequality, social insurance, and redistribution. American Political Science Review, 95, 859-874.
36.
MontgomeryJ. D. (1991). Social networks and labor-market outcomes: Toward an economic analysis. The American Economic Review, 81, 1408-1418.
37.
MungerM. C.HinichM. J. (1994). Ideology and the theory of political choice. Ann Arbor: University of Michigan Press.
38.
MutzD. C. (2006). Hearing the other side: Deliberative versus participatory democracy. Cambridge, UK: Cambridge University Press.
39.
Organisation for Economic Co-Operation and Development. (2010). Education at a glance 2010: OECD indicators. Paris, France: Author.
40.
PellizzariM. (2010). Do friends and relatives really help in getting a good job?Industrial & Labor Relations Review, 63, 494-510.
41.
PerottiR. (1996). Growth, income distribution and democracy: What the data say. Journal of Economic Growth, 1, 149-187.
42.
PontussonJ.RuedaD. (2008). Inequality as a source of political polarization: A comparative analysis of twelve OECD countries. In BeramendiP.AndersonC. J. (Eds.), Democracy, inequality, and representation (pp. 312-353). New York, NY: Russell Sage.
43.
PrzeworskiA.SpragueJ. (1988). Paper stones: A history of electoral socialism. Chicago, IL: University of Chicago Press.
44.
RehmP. (2009). Risks and redistribution: An individual-level analysis. Comparative Political Studies, 42, 855-881.
45.
RehmP. (2011). Risk inequality and the polarized American electorate. British Journal of Political Science, 41, 363-387.
46.
RuedaD.PontussonJ. (2000). Wage inequality and varieties of capitalism. World Politics, 52, 350-383.
47.
SartoriG. (1976). Parties and party systems: A framework for analysis. Cambridge, UK: Cambridge University Press.
48.
VaerenberghY. V.ThomasT. D. (2013). Response styles in survey research: A literature review of antecedents, consequences, and remedies. International Journal of Public Opinion Research, 25, 195-217.
49.
VisserJ. (2011). The ICTWSS database: Database on institutional characteristics of trade unions, wage setting, state intervention and social pacts in 34 countries between 1960 and 2010, Version 3.0. Amsterdam, The Netherlands: Amsterdam Institute for Advanced Labour Studies.
50.
WallersteinM. (1989). Union organization in advanced industrial democracies. American Political Science Review, 83, 481-501.
51.
WallersteinM. (1999). Wage-setting institutions and pay inequality in advanced industrial societies. American Journal of Political Science, 43, 649-680.
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