This paper analyses spatial differences in the voting results in Poland in the 2015 parliamentary elections. Eleven clusters defining different support profiles are determined using the two most popular stopping rules. Parameters of the multinomial logit model are estimated and determinants of Polish communes' membership in specific clusters are identified. The results of the estimation indicate that economic, sociodemographic and location variables strongly determined the Poles' electoral preferences. However, historical and cultural factors turned out to be the most important determinants.

This article explains the basis for electoral support for political parties in the Czech and Slovak Republics in the post-1993 period. The database consists of results from Parliamentary elections (in the Czech context, elections to the Chamber of Deputies) and of data obtained from censuses carried out by statistical agencies. The theory of conflict lines developed by Stein Rokkan and Seymour M. Lipset was chosen as the theoretical basis. The key analytical tool employed is linear regression. The explanation provided evaluates the dependence of political party electoral support (as defined by seats won in elections) upon socioeconomic variables contained in the theory. Analysis of the results shows that the support parties receive in elections depends significantly upon social characteristics. An especially clear explanation is generated for the support given to Christian and ethnic parties. For protest parties, the impact of the constituent social and economic structure is only marginal.

Party system nationalization is a crucial aspect of political competition. The territories of Eastern Europe have often been characterized by outstanding levels of territorial heterogeneity. However, during and after World War II ethnic cleansing and forced migration resulted in more homogeneous nation states, and these trends were significantly reinforced by bureaucratic, centralized communist rule. I present a systematic empirical assessment of party and party system homogeneity or heterogeneity in post-communist Eastern Europe and will discuss some major macrosociological and institutional factors determining the degree of party and party system nationalization such as the political consequences of social diversity and political cleavages, legacies of the communist regimes, electoral systems, and federalism.

The main aim of this paper is to show that behind the complex and fluid surface dimension of the Polish political scene it is possible to reveal a relatively stable two-dimensional structure of deep political identities. The study is based on the analysis of ecological data — the results of elections from 1990 to 1997. The results prove the exceptional stability of the Polish electoral geography and appear to be consistent with other studies based mainly on the survey data. The use of the spatial data allowed us to reveal the historical and spatial determinants of electoral behavior in Poland.