Lars Leszczensky

Lars Leszczensky
Universität Mannheim · Mannheimer Zentrum für Europäische Sozialforschung

Dr.

About

39
Publications
12,833
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677
Citations
Education
September 2010 - June 2016
Universität Mannheim
Field of study
  • Social Sciences

Publications

Publications (39)
Article
While network studies have shown that preferences of both Muslim and non-Muslim adolescents contribute to religious friendship segregation, it is unclear whether these preferences are ubiquitous or dependent on local context. Examining large-scale longitudinal friendship network data of adolescents in Germany, we investigate how the proportion of M...
Article
This data brief introduces the Friendship and Identity in School (FIS) dataset. The FIS data are school-based longitudinal social network data, which have become increasingly important in recent years. Including information on 2,500 adolescents in nine secondary schools in the German federal state of North Rhine-Westphalia, the FIS data have four i...
Article
Full-text available
Background Operating schools safely under pandemic conditions is a widespread policy goal. We analyse the effectiveness of classroom cohorting, i.e., the decomposition of classrooms into smaller isolated units, in inhibiting the spread of SARS-CoV-2 in European secondary schools and compare different cohorting strategies. Methods Using real-world...
Article
Even in diverse schools that provide opportunities for interreligious friendships, Muslim youth disproportionally tend to be friends with Muslims rather than non-Muslims. Echoing broader debates about minorities’ self-segregation versus exclusion by majority group members, a key question is whether religious friendship segregation arises because of...
Preprint
Dividing classrooms may reduce the risk of SARS-CoV-2 outbreaks in schools. We investigate how classroom cohorting strategies, which downsize and isolate groups, may curb the spread of SARS-CoV-2. Using agent-based modelling based on a rich multi-country network dataset comprising 507 classrooms and 12,291 students, we assess random cohorting and t...
Article
Full-text available
Little is known on how ethnic minority adolescents develop acculturation profiles of identification (i.e., how they combine their ethnic and national identification, such as being high on bothand thus rather “integrated” or high on ethnic and low on national and thus rather “separated”). In a first step, this three-year longitudinal study classifie...
Article
Full-text available
Muslim religiosity is often portrayed as a barrier to integration into secular societies, especially in Europe. Scholars suggest that religiously segregated networks reinforce Muslims’ religiosity and religious identification, but solid evidence is scarce. Based on longitudinal German data, we examined whether friendship networks influence Muslim y...
Article
Full-text available
An important public debate in contemporary Europe is whether immigrant-origin Muslims will successfully integrate into mainstream society. We engage those debates by analysing national identification among immigrant-origin Muslim adolescents in England, Germany, the Netherlands, and Sweden. A common argument is that the Islamic religion prevents Mu...
Preprint
Little is known on how ethnic minority adolescents develop acculturation profiles of identification (e.g., integrated or separated). This 3-year longitudinal study first classified Turkish-origin (n = 344) and resettler-origin (n = 121) ethnic minority adolescents (M age = 14.2, SD = 1.54 , 51.6 % female) living in Germany according to their levels...
Article
Full-text available
Does X affect Y? Answering this question is particularly difficult if reverse causality is looming. Many social scientists turn to panel data to address such questions of causal ordering. Yet even in longitudinal analyses, reverse causality threatens causal inference based on conventional panel models. Whereas the methodological literature has sugg...
Article
European youth attend classrooms that are religiously diverse, with the importance of religion differing between ethno-religious groups. While religion no longer matters much to many native-origin Christian youth, it is important to many of their immigrant-origin Christian and, especially, Muslim peers. Considering religion as a source of adolescen...
Article
Individual preferences for same-ethnic friends contribute to persistent segregation of adolescents’ friendship networks. Yet, we know surprisingly little about the mechanisms behind ethnic homophily. Prior research suggests that ethnic homophily is ubiquitous, but a social identity perspective indicates that strong ingroup identification drives ing...
Article
Full-text available
This article reviews empirical evidence on the reciprocal relation of ethnic minority group members’ national, ethnic, and dual identification on the one hand and their friendships with both minority and majority group members on the other. Emphasis is given on studies that apply methods of longitudinal social network analysis in order to draw infe...
Article
Full-text available
The notion that ethnic and religious minority identities are inherently incompatible with the national identities of European immigrant‐receiving societies is popular in public discourse. Although findings documenting such negative associations seemingly support this claim, other research shows that the intergroup context matters for the extent to...
Article
Full-text available
Recent research has shown that peers influence ethnic-racial identity (ERI) development during early adolescence. Arguments based on social identity theory (SIT), however, suggest that only same-ethnic but not cross-ethnic friends are important for ERI development. Using longitudinal social network analysis, we examined peer influence of both same-...
Article
Zusammenfassung Beeinflusst Religion die soziale Integration von Migranten? Obwohl diese Frage wichtiger denn je ist, mangelt es an belastbaren Befunden. Im vorliegenden Beitrag argumentiere ich, dass Religion die Entwicklung enger , freundschaftlicher Kontakte zu Deutschen, nicht jedoch die allgemeine Kontakthäufigkeit beeinflusst. Mit Längsschnit...
Preprint
Does X affect Y? Answering this question is particularly difficult if Y may in turn affect X. Often facing the possibility of such reverse causality, many social scientists turn to panel data to address questions of causal ordering. Yet even in longitudinal analyses reverse causality threatens causal inference by biasing results obtained from conve...
Article
Recent network research indicates that native youth prefer to befriend immigrants with stronger rather than weaker host country identification. Surprisingly, however, no respective preference of high-identifying immigrants for native friends has been found, and there is little evidence that friends influence immigrants' identification. Seeking to m...
Article
Friends tend to be similar in their academic achievement. In this study, we investigate whether this similarity results from students selecting friends with similar achievement or from friends influencing students' achievement. In particular, we argue that selection and influence effects should be stronger among girls than among boys. Using friends...
Article
Full-text available
Research has established that adolescents both befriend peers based on their academic achievement and adjust their own achievement to that of their friends’ over time. However, these processes may be different for ethnic minority students, because some of them may adhere to an oppositional culture that rejects striving for academic success. We exam...
Article
Full-text available
This study investigated the effects of ethnic minority adolescents’ ethnic self-identification (host country, dual, or heritage country) on friendship choices among ethnic majority and minority peers. Hypotheses were derived from similarity–attraction and social identity theory and tested using longitudinal social network data from 1,004 middle sch...
Article
Full-text available
This study investigated how students’ ethnic pride was related to variation in ethnic composition between classrooms as well as within the same classroom over time. Predictions derived from Optimal Distinctiveness Theory (ODT) were tested among 13 to 14 year old ethnic majority and minority students (N=1,123). Lending support to ODT, a curvilinear...
Article
In contemporary Western Europe, both scholars and the public discuss the consequences of a rising share of a comparatively religious Muslim population for societal coexistence. Yet we know surprisingly little about how religion and religiosity shape social relationships. Focusing on adolescents’ friendship networks, we examine how religion and reli...
Technical Report
Full-text available
There is an increasing amount of literature on how to analyze longitudinal data of complete social networks. Guidance on how to collect such data in schools, however, is both scant and desperately needed, because longitudinal social network analysis has high data requirements. Aiming to provide guidance for future data collection of school-based ne...
Thesis
Full-text available
The stronger young immigrants identify with the host country, the more native friends they have–and vice versa. While this association between emotional and social integration has been established by cross-sectional studies, little is known about how and why it emerges. This cumulative dissertation contains four longitudinal studies that were condu...
Poster
Full-text available
Contains Key Facts and Findings of Our Project
Article
Immigrants who strongly identify with the host country have more native friends than immigrants with weaker host country identification. However, the mechanisms underlying this correlation are not well understood. Immigrants with strong host country identification might have stronger preferences for native friends, or they might be more often chose...
Article
Adolescents’ school-based friendship networks tend to be segregated along ethnic lines. But few studies have examined whether variation in network boundaries affects the degree of ethnic friendship segregation. We use rational-choice theory to argue that ethnic homophily is more pronounced for friendships between classrooms than for those within cl...
Article
Full-text available
Comparatively few studies quantitatively examine the mechanisms underlying the formation of and change in young immigrants’ ethnic and host country national identifications. A key reason for this research gap is the lack of an accurate measure of ethnic and national identity that meets the demands of integration research, i.e., includes a native re...
Article
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Technical Report
Full-text available
The research project Friendship and Identity in School, which is funded by the German ResearchFoundation (DFG), investigates the formation and change of adolescents’ social networks and ethnic identifications. For this purpose, network panel data were collected in nine schools in the federal state of North Rhine-Westphalia, Germany. This field repo...
Technical Report
Full-text available
The research project Friendship and Identity in School, which is funded by the German ResearchFoundation (DFG), investigates the formation and change of adolescents’ social networks and ethnic identifications. For this purpose, network panel data were collected in nine schools in the federal state of North Rhine-Westphalia, Germany. This field repo...
Technical Report
Full-text available
The research project Friendship and Identity in School, which is funded by the Deutsche Forschungsgemeinschaft (DFG), investigates the formation and change of adolescents’ social networks and ethnic identifications. For this purpose, network panel data are collected in nine schools in North Rhine-Westphalia. This technical report documents the prep...
Technical Report
Full-text available
Die Mechanismen der Entstehung und des Wandels ethnischer Zugehörigkeitsgefühle von Kindern und Jugendlichen sind in Deutschland vergleichsweise wenig gut erforscht. Hauptgrund hierfür ist, dass ein hinreichend differenziertes und präzises Messinstrument im deutschsprachigen Kontext bislang fehlt. Ausgehend von migrationssoziologischen und sozialps...
Article
Previous research has repeatedly found a positive association between immigrants' identification with the receiving society and their share of interethnic friends. That is, immigrants with a low level of national identification have relatively little contact with natives, and vice versa. Earlier cross-sectional studies, however, were not able to dr...

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Projects

Projects (2)
Project
formally modelling dynamics and conditions of opinion polarization modelling effects of segregation on opinion formation, improving models of persuasive argument exchange, experimental and field research on cooperation and social control