Ethnic concentration and language fluency of immigrants in Germany

Studies that investigate the effect of the regional ethnic composition on immigrant outcomes have been complicated by the self-selection of ethnic minorities into specific neighbourhoods. We analyse the impact of own-ethnic concentration on the language proficiency of immigrants by exploiting the fact that the initial placement of guest-workers after WWII was determined by labour demanding firms and the federal labour administration and hence exogenous to immigrant workers. Combining several data sets, we find a small but robust and significant negative effect of ethnic concentration on immigrants’ language ability. Simulation results of a choice model in which location and learning decisions are taken simultaneously confirm the presence of the effect. Immigrants with high learning costs are inclined to move to ethnic enclaves, so that the share of German-speakers would increase only modestly even under the counterfactual scenario of a regionally equal distribution of immigrants across Germany

Ethnic concentration and language fluency of immigrants : quasi-experimental evidence from the guest-worker placement in Germany (Ethnische Konzentration und Sprachkompetenz von Einwanderern : quasi-experimentelle Befunde aus der Gastarbeiteranwerbung in Deutschland)

"The paper analyses the impact of regional own-ethnic concentration on the language proficiency of immigrants. It solves the endogeneity of immigrants' location choices by exploiting the fact that guest-workers in Germany after WWII were initially placed by firms and labor agencies. We find a robust negative effect of ethnic concentration on immigrants' language ability. Simulation results of a simultaneous location and learning choice model confirm the presence of the effect and show how immigrants with high learning cost select into ethnic enclaves. Under the counterfactual scenario of a regionally equal distribution of immigrants the share of German-speakers increases only modestly." (Author's abstract, IAB-Doku) ((en))Einwanderer, Beschäftigungspolitik, Arbeitskräftemangel, Wohnort, Einwanderungsland, Sprachkenntnisse, deutsche Sprache, ethnische Gruppe, Ballungsraum

Ethnic Concentration and Language Fluency of Immigrants in Germany

Studies that investigate the effect of the regional ethnic composition on immigrant outcomes have been complicated by the self-selection of ethnic minorities into specific neighbourhoods. We analyse the impact of own-ethnic concentration on the language proficiency of immigrants by exploiting the fact that the initial placement of guest-workers after WWII was determined by labour demanding firms and the federal labour administration and hence exogenous to immigrant workers. Combining several data sets, we find a small but robust and significant negative effect of ethnic concentration on immigrants' language ability. Simulation results of a choice model in which location and learning decisions are taken simultaneously confirm the presence of the effect. Immigrants with high learning costs are inclined to move to ethnic enclaves, so that the share of German-speakers would increase only modestly even under the counterfactual scenario of a regionally equal distribution of immigrants across Germany.enclave, ethnic concentration, language proficiency, immigrants, Instrumental variable, random utility model

Depletion forces between two spheres in a rod solution

We study the depletion interaction between spherical particles of radius R immersed in a dilute solution of rigid rods of length L. The computed interaction potential is, within numerical accuracy, exact for any value of L/R. In particular we find that for L of order R, the depth of the depletion well is smaller than the prediction of the Derjaguin approximation. Our results bring new light into the discussion on the lack of phase separation in colloidal mixtures of spheres and rods.Comment: 12 pages including figures. 5 eps figures. LaTeX with REVTe

Market Power and Efficiency of Islamic Banking and Conventional Banking in Indonesia

ASEAN Economic Community (AEC) of banking industry requires both Islamic and conventional banking to improve their efficiency because the competition in banking market industry will be more intense. Therefore, this study aims to identify the type of hyphotesis of industrial organization which exists in Islamic and conventional banks in order to investigate their readiness for AEC. The research sampling consists of 10 Islamic banks and 10 conventional banks from January 2009 to December 2016. To measure x-efficiency and scale efficiency, this research uses Data Envelopment Analysis (DEA). Meanwhile, the concentration is measured by Lerner index. The hypothesis is tested by using panel regression. The result shows SCP (Structure-Conduct-Performance) hypothesis is closely applied to Islamic and conventional banks because market concentration significantly influences profitability. RMP (Relative Market Power) hypothesis is also closely applied to Islamic and conventional banking, this indicates Indonesian banking has market power in determining prices and this condition makes the profit higher. RES (Relative Efficiency Structure) and SES (Scale Efficiency Structure) hypothesis do not exist in both conventional and Islamic banks because x-efficiency and scale efficiency do not affect profitability, concentration, and market share simultaneously. Market power and efficiency researches are commonly conducted in conventional banking, however there are only a few research in Islamic banking area. The novelty of this study is the comparison between conventional and Islamic banking in the term of market structure and efficiency

Continuous Dependence for the Pseudoparabolic Equation

We determine the continuous dependence of solution on the parameters in a Dirichlet-type initial-boundary value problem for the pseudoparabolic partial differential equation

Comparison of Different Machine Learning Algorithms for Breast Cancer Recurrence Classification

In this paper we compared some machine learning algorithms to predict recurrence of breast cancer and see which model used gives best accuracy for the prediction. In this study we used database donated by University Medical Centre, Institute of Oncology, Ljubljana, Slovenia. The preprocessed dataset includes 286 instances, 9 attributes and 1 class attribute. Firstly, we used attribute evaluation to see which attribute is more effective on class attribute. Secondly we have explored three different algorithms: C4.5, Random Forest and K Nearest Neighbor. Several data mining tools have been applied with these 3 algorithms to explore which model is better on accuracy. Finally we have found that C4.5 algorithm is the best for our dataset: breast cancer recurrence

Rods Near Curved Surfaces and in Curved Boxes

We consider an ideal gas of infinitely rigid rods near a perfectly repulsive wall, and show that the interfacial tension of a surface with rods on one side is lower when the surface bends towards the rods. Surprisingly we find that rods on both sides of surfaces also lower the energy when the surface bends. We compute the partition functions of rods confined to spherical and cylindrical open shells, and conclude that spherical shells repel rods, whereas cylindrical shells (for thickness of the shell on the order of the rod-length) attract them. The role of flexibility is investigated by considering chains composed of two rigid segments.Comment: 39 pages including figures and tables. 12 eps figures. LaTeX with REVTe

Do Ethnic Enclaves Impede Immigrants’ Integration? Evidence from a Quasi-Experimental Social-Interaction Approach

It is widely debated whether immigrants who live among co-ethnics are less willing to integrate into the host society. Exploiting the quasi-experimental guest worker placement across German regions during the 1960/70s as well as information on immigrants' inter-ethnic contact networks and social activities, we are able to identify the causal effect of ethnic concentration on social integration. The exogenous placement of immigrants ‘switches off’ observable and unobservable differences in the willingness or ability to integrate which have confounded previous studies. Evidence suggests that the presence of co-ethnics increases migrants' interaction cost with natives and thus reduces the likelihood of integration

Ethnic concentration and language fluency of immigrants

The paper analyses the impact of regional own-ethnic concentration on the language proficiency of immigrants. It solves the endogeneity of immigrants' location choices by exploiting the fact that guest-workers in Germany after WWII were initially placed by firms and labor agencies. We find a robust negative effect of ethnic concentration on immigrants' language ability. Simulation results of a simultaneous location and learning choice model confirm the presence of the effect and show how immigrants with high learning cost select into ethnic enclaves. Under the counterfactual scenario of a regionally equal distribution of immigrants the share of German-speakers increases only modestly.Dieses Paper analysiert die Wirkung von regionalen ethnischen Konzentrationen auf die Sprachkompetenz von Einwanderern. Wir lösen die Endogenität der Wohnortentscheidungen der Einwanderer in dem wir den Umstand nutzen, dass Einwanderer im Rahmen der Gastarbeiteranwerbung ihren ersten Arbeitsort nicht auswählen konnten. Wir finden belastbare negative Effekte der ethnischen Konzentration auf die Beherrschung der deutschen Sprache. Simulationsergebnisse eines Modells mit gleichzeitigen Lern- und Wohnortentscheidungen unterstützen diesen Befund und zeigen, dass Einwanderer mit hohen Lernkosten gezielt in ethnische Enklaven ziehen. Unter dem Szenario einer Gleichverteilung der Einwanderer über Deutschland würde sich der Anteil der deutsch sprechenden Einwanderer nur geringfügig erhöhen