Do the skilled and prime-aged unemployed benefit more from training? Effect heterogeneity of public training programmes in Germany

This study analyses the treatment effects of public training programmes for the unemployed in Germany. Based on propensity score matching methods, we extend the picture that has been sketched in previous studies by estimating the treatment effects of medium-term programmes for different skill and age groups. Our results indicate that programme participation has a positive impact on employment probabilities and earnings for almost all sub-groups. We find little evidence for the presence of heterogeneous treatment effects, and the magnitude of the differences is quite small. Our results thus – at least in part – conflict with the strategy to provide training increasingly to individuals with better employment prospects.     

Trade union membership and earnings in Kenyan manufacturing firms

This study analyses the effect of trade unions on male earnings in the Kenyan manufacturing sector using a regression method, which takes into account endogeneity of the union status of workers. In contrast to earlier studies of the Kenyan labour market that report a negative effect of unions on wages, a positive effect is found. The study further shows that elite workers tend to abstain from union membership.     

A NON-SIGN-PRESERVING RAS VARIANT

We have developed a variant of the RAS generalised iterative scaling method that is able to change the sign between successive iterates, and thus fulfil constraints that are infeasible for existing RAS variants. Like earlier RAS variants, our method can handle constraints on arbitrarily sized and shaped subsets of matrix elements, include reliability of the initial estimate and the external constraints, and deal with negative values.     

European Economic Governance – Wirtschaftspolitik jenseits der Nationalstaaten

Die Globalisierung erschwert die Bereitstellung öffentlicher Güter innerhalb nationaler Grenzen. Ein System der politischen Zusammenarbeit könnte aber eine mögliche Unterversorgung mit öffentlichen Gütern verhindern. Wie wird in der Europäischen Union die Wirtschaftspolitik einzelner Länder koordiniert? Welche Koordinierungsmethoden kommen zu den besten Ergebnissen?Prof. Dr. Arne Heise, 44, lehrt Volkswirtschaftslehre an der Universität Hamburg.     

The Relationship between Animal Welfare and Economic Performance at Farm Level: A Quantitative Study of Danish Pig Producers

We propose a theoretical framework for the relationship between animal welfare and the economic performance of livestock farms. We empirically analyse this relationship based on a unique dataset of randomly sampled Danish pig herds that includes information from unannounced inspections of the compliance with the animal welfare legislation. We find large variations in economic performance and animal welfare. The relationship between these two indicators is rather weak, but tends to be slightly positive. A possible explanation for our results is that management has a major influence on both economic performance and animal welfare so that good farm managers are able to meet all animal welfare regulations, while achieving a high economic performance.     

Robustifizierung des Chain-Ladder-Verfahrens über ein skalares Zustandsraummodell

Applications of state space models and the Kalman filter are comparatively underrepresented in stochastic claims reserving. This is usually caused by their high complexity due to matrix-based approaches, which complicate their applications. In order to facilitate the implementation of state space models in practice, we present a state space model for cumulative payments in the framework of a scalar-based approach. In addition to a comprehensive presentation of this scalar state space model, some empirical applications and comparisons with popular stochastic claims reserving methods are performed, which show the strengths of the scalar state space model in practical applications. This model is a robustified extension of the well-known Chain Ladder method under the assumption, that the observations in the upper triangle are based on unobservable states. Using Kalman-filter recursions for prediction, filtering and smoothing of cumulative payments, the entire unobservable lower and upper run-off triangles can be determined. Moreover, the model provides an easy way to find and smooth outliers and to interpolate gaps in the data. Thus, the problem of missing values in the upper triangle is also solved in a natural way.     

Power to business professors: Automatic grading of problem-solving tasks in a spreadsheet

This paper presents an innovative approach, based on Excel files and a detailed implementation guide, that allows a professor with proficient spreadsheet skills to develop individualized problem-solving tasks for assignments and examinations that test students on cognitive thinking processes beyond memorizing and drilling. The professor accomplishes this goal by requiring the students to model a business problem-solving task in a worksheet environment. Each student’s work is marked automatically by a generic “plug and play” Visual Basic for Application (VBA) algorithm. The scores and feedback provided are tailored to each individual student and address not only the problem-solving outcome but also the problem-solving process. The learning objective discussed in this work is implemented at a Norwegian university business school.     

Risk capital allocation for RORAC optimization

This paper considers the financial optimization problem of a firm with several sub-businesses striving for its optimal RORAC. An insightful example shows that the implementation of classical gradient capital allocation can be suboptimal if division managers are allowed to venture into all business whose marginal RORAC exceeds the firm’s RORAC. The marginal RORAC requirements are refined by adding a risk correction term that takes into account the interdependencies of the risks of different lines of business. It is shown that under certain stationarity conditions this approach can guarantee that the optimal RORAC will eventually be achieved.