Migrant Youths‘ Educational Achievement: The Role of Institutions

We use 2009 Programme of International Student Assessment (PISA) data to link institutional arrangements in OECD countries to the disparity in reading, math, and science test scores for migrant and native-born students. We find that achievement gaps are larger for those migrant youths who arrive later and for those who do not speak the test language at home. Institutional arrangements often serve to mitigate the achievement gaps of some migrant students while leaving unaffected or exacerbating those of others. For example, earlier school starting ages help migrant youths in some cases, but by no means in all. Limited tracking on ability appears beneficial for migrants' relative achievement, while complete tracking and a large private school sector appear detrimental. Migrant students' achievement relative to their native-born peers suffers as educational spending and teachers' salaries increase, but is improved when examination is a component of the process for evaluating teachers.Wir verwenden PISA-Daten aus dem Jahr 2009, um einen Zusammenhang zwischen institutionellen Rahmenbedingungen in OECD-Ländern und Unterschieden in den Testergebnissen in den Bereichen Lesen, Mathematik und Naturwissenschaften zwischen einheimischen und ausländischen Schülern herzustellen. Wir beobachten geringere Lernerfolge bei ausländischen Schülern, die relativ spät eingewandert sind und/oder die Sprache des Leistungstests nicht zu Hause sprechen. Institutionelle Rahmenbedingungen mildern die Leistungsunterschiede für einige ausländische Schüler, haben aber auf andere Schüler keine oder sogar negative Auswirkungen. Ein frühes Einschulungsalter hilft beispielsweise ausländischen Schülern in einigen Fällen, aber keineswegs in allen. Eine geringe Einteilung in Leistungsklassen erscheint förderlich für den relativen Erfolg ausländischer Schüler, während eine starke Einteilung in Leistungsklassen und ein hoher Anteil privater Schulen schädlich zu sein scheinen. Der relative Lernerfolg ausländischer Studenten leidet, wenn Bildungsausgaben und Lehrergehälter steigen, aber verbessert sich wenn Prüfungen eine Komponente des Evaluationsprozesses von Lehrern darstellen

The Principal Conflict in Contemporary Russian Economic Thought: Traditional Approaches Against Economics

The work deals with the ideological clashes in Russian economic thought after 1991. Based on Schumpeter's distinction between economic analysis and economic thought, the paper focuses on a principal conflict that divides a new generation of Westernminded scholars and traditional Russian political economists. This conflict, on the one hand, is described as an attempt of traditional political economists to keep their positions at the economic departments of the universities. The most vivid manifestation of the resistance to economics is the so-called Tsagolov School at Moscow State University. On the other hand, the conflict might be regarded as the reaction of Russian nationalism to the penetration of ?alien? influences that are rather incompatible with the antiindividualist traditions of Russian social thought. The movement towards the creation of a ?national political economy? based on holism and etatism is seen not only as an expression and a by-product of resistance to methodological individualism in economics, but also as implicitly state-induced ideological efforts in a period of transition to an autocratic regime in Russia

Educational effects of early or later secondary school tracking in Germany

This paper examines educational outcomes of pupils selected to secondary school types by different tracking regimes in a German state: Pupils are alternatively streamed after fourth grade or after sixth grade. Regression results indicate that, estimated on the mean, there are no negative effects of later tracking on educational outcomes in the middle of secondary school. Positive effects are observed for pupils with a less favorable family background. Quantile regressions reveal that the estimated effects of later tracking are positive for the lower quantiles but decrease monotonically over the conditional distribution of test scores

The diagnostic criteria for small fibre neuropathy: from symptoms to neuropathology

Small fibre neuropathy (SFN), a condition dominated by neuropathic pain, is frequently encountered in clinical practise either as prevalent manifestation of more diffuse neuropathy or distinct nosologic entity. Aetiology of SFN includes pre-diabetes status and immune-mediated diseases, though it remains frequently unknown. Due to their physiologic characteristics, small nerve fibres cannot be investigated by routine electrophysiological tests, making the diagnosis particularly difficult. Quantitative sensory testing (QST) to assess the psychophysical thresholds for cold and warm sensations and skin biopsy with quantification of somatic intraepidermal nerve fibres (IENF) have been used to determine the damage to small nerve fibres. Nevertheless, the diagnostic criteria for SFN have not been defined yet and a ‘gold standard’ for clinical practise and research is not available. We screened 486 patients referred to our institutions and collected 124 patients with sensory neuropathy. Among them, we identified 67 patients with pure SFN using a new diagnostic ‘gold standard’, based on the presence of at least two abnormal results at clinical, QST and skin biopsy examination. The diagnosis of SFN was achieved by abnormal clinical and skin biopsy findings in 43.3% of patients, abnormal skin biopsy and QST findings in 37.3% of patients, abnormal clinical and QST findings in 11.9% of patients, whereas 7.5% patients had abnormal results at all the examinations. Skin biopsy showed a diagnostic efficiency of 88.4%, clinical examination of 54.6% and QST of 46.9%. Receiver operating characteristic curve analysis confirmed the significantly higher performance of skin biopsy comparing with QST. However, we found a significant inverse correlation between IENF density and both cold and warm thresholds at the leg. Clinical examination revealed pinprick and thermal hypoesthesia in about 50% patients, and signs of peripheral vascular autonomic dysfunction in about 70% of patients. Spontaneous pain dominated the clinical picture in most SFN patients. Neuropathic pain intensity was more severe in patients with SFN than in patients with large or mixed fibre neuropathy, but there was no significant correlation with IENF density. The aetiology of SFN was initially unknown in 41.8% of patients and at 2-year follow-up a potential cause could be determined in 25% of them. Over the same period, 13% of SFN patients showed the involvement of large nerve fibres, whereas in 45.6% of them the clinical picture did not change. Spontaneous remission of neuropathic pain occurred in 10.9% of SFN patients, while it worsened in 30.4% of them

Imposed Benefit Sanctions and the Unemployment-to-Employment Transition: The German Experience

We analyze the effect of imposed benefit sanctions on the unemployment-to-employment transition of unemployed people entitled to unemployment compensation on the basis of register data from the German Federal Employment Agency. We combine propensity score matching with a discrete-time hazard rate model which accounts for the dynamic nature of the treatment. We find positive short- and long-term effects of benefit sanctions which are robust for men and women in East and West Germany. The effects diminish with the elapsed unemployment duration until a sanction is imposed. The limited use of benefit sanctions can thus be an effective activation tool if they take place not too late in an individual's unemployment spell

Ocean acidification has different effects on the production of dimethylsulfide and dimethylsulfoniopropionate measured in cultures of Emiliania huxleyi and a mesocosm study:a comparison of laboratory monocultures and community interactions

The human-induced rise in atmospheric carbon dioxide since the industrial revolution has led to increasing oceanic carbon uptake and changes in seawater carbonate chemistry, resulting in lowering of surface water pH. In this study we investigated the effect of increasing CO2 partial pressure (pCO2) on concentrations of volatile biogenic dimethylsulfide (DMS) and its precursor dimethylsulfoniopropionate (DMSP), through monoculture studies and community pCO2 perturbation. DMS is a climatically important gas produced by many marine algae: it transfers sulfur into the atmosphere and is a major influence on biogeochemical climate regulation through breakdown to sulfate and formation of subsequent cloud condensation nuclei (CCN). Overall, production of DMS and DMSP by the coccolithophore Emiliania huxleyi strain RCC1229 was unaffected by growth at 900 μatm pCO2, but DMSP production normalised to cell volume was 12 % lower at the higher pCO2 treatment. These cultures were compared with community DMS and DMSP production during an elevated pCO2 mesocosm experiment with the aim of studying E. huxleyi in the natural environment. Results contrasted with the culture experiments and showed reductions in community DMS and DMSP concentrations of up to 60 and 32 % respectively at pCO2 up to 3000 μatm, with changes attributed to poorer growth of DMSP-producing nanophytoplankton species, including E. huxleyi, and potentially increased microbial consumption of DMS and dissolved DMSP at higher pCO2. DMS and DMSP production differences between culture and community likely arise from pH affecting the inter-species responses between microbial producers and consumers