Promoting workplace‐based training to fight youth unemployment in three EU countries: Different strategies,different results?

During the economic crisis, youth unemployment grew exponentially in many European countries. It was argued that countries with a high level of firm involvement in the provision of initial vocational training were better equipped to address this problem. Boosting workplace‐based training was therefore seen as the right strategy to tackle unemployment. Using Denmark, Spain and the UK as case studies, this article analyses how countries with different skill formation systems have improved this type of training. While the UK reinforced the voluntaristic character of its training regime, Denmark improved the quality of its vocational education, and Spain made reforms to the training and apprenticeship contract. Interestingly, the countries achieved different results. To explain this divergence, it is argued that while the reforms made in the UK and Denmark were compatible with the national institutions and coordination mechanisms, this was not the case in Spain, where reforms were implemented in a non‐complementary way. Key Practitioner Message:

• After the economic crisis it was argued that countries with a high level of firm involvement in the provision of initial VET were better equipped to fight youth unemployment.
• The study analysed how countries with different skill formation systems improved this type of training and assessed their relative success.
• The article shows that when implementing reforms policy makers must take into account the institutions and mechanisms of coordination that prevail in each country. Otherwise, reforms may be unsuccessful.

     

Genetic influence on age at first birth of female twins born in the UK, 1919–68

Using a sample of monozygotic (945, 42?per cent) and dizygotic (1,329, 58?per cent) twin pairs born 1919–68 in the UK, we applied innovative tobit models to investigate genetic and environmental influences on age at first birth (AFB). We found that a substantial part (40?per cent) of the variation in AFB is caused by latent family characteristics. Genetic dispositions (26?per cent) play a more important role than the shared environment of siblings (14?per cent), with the non-shared environment/measurement error having the strongest influence (60?per cent). Like previous studies, this study reveals marked changes in estimates over time, and supports the idea that environmental constraints (war or economic crisis) suppress and normative freedom (sexual revolution) promotes the activation of genetic predispositions that affect fertility. We show that the exclusion of censored information (i.e., on the childless) by previous studies biased their results.

Supplementary material for this article is available at: http://dx.doi.org/10.1080/00324728.2015.1056823     

Immigrants in the UK and in West Germany –Relative income position,income portfolio,and redistribution effects

Based on data from the BHPS and the SOEP, we analyse the economic performance of various ethnic groups in the UK and West Germany, as well as the effects of income redistribution on these populations. Taking the indigenous population of each country as the reference category, we find that, as a whole, the non-indigenous population in the UK fares much better than the immigrant population in Germany. However, the range of economic performance across different ethnic groups in the UK is much larger than that in Germany. The German corporatist welfare system is characterised by much stronger redistribution effects than the liberal UK one. Consequently, the relatively low-performing immigrant population in Germany profits more from the redistribution system than immigrants with similar socio-economic attributes in the UK.All correspondence to Felix Büchel. Responsible editor: Christoph M. Schmidt     

Managing Electricity Peak Loads in Make‐To‐Stock Manufacturing Lines

In this article, we study the control of stochastic make‐to‐stock manufacturing lines in the presence of electricity costs. Electricity costs are difficult to manage because unit costs increase with the total load, that is, the amount of electricity needed by the manufacturing line at a certain point in time. We demonstrate that standard methods for controlling manufacturing lines cannot be used and that standard analytic results for stochastic manufacturing lines do not hold in the presence of electricity costs. We develop a control policy that balances electricity costs with inventory holding and backorder costs. We derive closed‐form expressions and analytic properties of the expected total cost for manufacturing lines with two workstations and demonstrate the accuracy and robustness of the policy for manufacturing lines with more than two workstations. The results indicate that avoiding electricity peak loads requires additional investment in manufacturing capacity and higher inventory and backorder costs. Our approach also applies to companies which aim at reducing their carbon emissions in addition to their operating costs.     

Marginalized zero-inflated generalized Poisson regression

The generalized Poisson (GP) regression model has been used to model count data that exhibit over-dispersion or under-dispersion. The zero-inflated GP (ZIGP) regression model can additionally handle count data characterized by many zeros. However, the parameters of ZIGP model cannot easily be used for inference on overall exposure effects. In order to address this problem, a marginalized ZIGP is proposed to directly model the population marginal mean count. The parameters of the marginalized zero-inflated GP model are estimated by the method of maximum likelihood. The regression model is illustrated by three real-life data sets.     

Sector Programme Approaches: Will They Work in Agriculture?

This article explores why sector‐wide approaches, in which donor funds support a single sector plan under government leadership, have performed less well in agriculture than in the social sectors. Many problems stem from the more limited, more contested and shrinking role of the state in the agricultural sector. It is also argued that sector programmes have worked best where the key constraints on sector development are the responsibility of a single ministry, whereas agricultural development requires co‐ordinated interventions across sectors. The sector approach may have a limited role in delivering better focused agricultural services, but fundamental policy questions need to be resolved first. This is more likely if support for reforms is channelled through central economic ministries and other bodies outside the agriculture ministry.     

Ökologische Validität durch Mixed-Methods-Designs

Due to their focus on variable-oriented comparisons and large-N samples, survey methods are prone to lack information on the context-specific, practical meaning of measured constructs. This issue is explicated via the concept of “ecological validity”. A sequential quantitative-qualitative mixed-methods-study on anti-American prejudice in Germany is presented to demonstrate how semi-structured qualitative interviews (n = 22) can compensate for lacking ecological validity in standardized prejudice measurements (CATI-survey, n = 808, summer 2011). Qualitative analyses provide context-sensitive insight into the rhetorical functions of anti-American speech. They are used to generate explanatory hypotheses for correlations between anti-American, anti-Semitic, and racist prejudice in the survey data. This complementarity of research methods is closely connected to an enhanced theoretical perspective: The combination of attitude-based and speech-act-theoretical concepts of prejudice helps to increase construct validity in the example study.     

Approximate Generalizations and Computational Experiments

In this paper I demonstrate how one can generalize finitely many examples to statements about (infinite) classes of economic models. If there exist upper bounds on the number of connected components of one‐dimensional linear subsets of the set of parameters for which a conjecture is true, one can conclude that it is correct for all parameter values in the class considered, except for a small residual set, once one has verified the conjecture for a predetermined finite set of points. I show how to apply this insight to computational experiments and spell out assumptions on the economic fundamentals that ensure that the necessary bounds on the number of connected components exist. I argue that these methods can be fruitfully utilized in applied general equilibrium analysis. I provide general assumptions on preferences and production sets that ensure that economic conjectures define sets with a bounded number of connected components. Using the theoretical results, I give an example of how one can explore qualitative and quantitative implications of general equilibrium models using computational experiments. Finally, I show how random algorithms can be used for generalizing examples in high‐dimensional problems.