A pre-estimation sample separation method for a labor market in disepuilibrium

The paper presents a method for separating the sample on wage rate and labor input for a labor market in disequilibrium prior to the estimation stage. It is shown how the method's economic rationale stems from the existence of Keynesian unemployment, which implies a combination of real wage and labor input off the notional labor demand and supply curves. The potential usefulness of the method for generating unbiased estimates of wage elasticities of labor demand and labor supply is demonstrated on annual U.S. data.     

THE RELATIONSHIP BETWEEN FOOD PRODUCTION AND CONSUMPTION VARIABILITY: POLICY IMPLICATIONS FOR DEVELOPING COUNTRIES

This paper examines whether there is increased inter-year instability in food consumption at the national level, and to what extent this is attributable to increased instability of food production in the wake of adoption of modern agricultural technology. The data analysed indicates that increased production instability does translate into increased fluctuations in consumption. Nevertheless, year-to-year consumption variability among the sample of 38 countries has declined during the past 25 years. This is attributed to improved stocking operations and trade practices which accompany economic growth. Nevertheless, food insecurity, as measured in terms of fluctuations around trend levels of consumption, does remain a problem, especially among the poor. Therefore, policy options to reduce consumption instability are outlined.     

A note on why more West than East German firms export

Germany is one of the most important exporters of manufacturing goods in the world, but by far not all manufacturing firms in Germany are exporters, and there is a remarkable gap between the share of exporters in all manufacturing firms between West Germany and East Germany. While in West Germany in 2004 about two in three manufacturing plants were exporters, fourteen years after re-unification this share was less than fifty percent in the former communist East Germany. Given that exports play a key role in shaping business cycles and growth in Germany, and the much higher unemployment in East compared to West Germany, promotion of exports by East German firms figure prominently on the policy agenda. However, the reasons for the large difference in the propensity to export between East and West German firms are not yet well understood, not least due to a lack of comprehensive micro data. Using unique new data and a recently introduced non-linear decomposition technique this paper shows that the huge difference in the propensity to export between West and East German plants can only partly be explained by differences in firm size, productivity, and technology intensity.

Redistribution from a constitutional perspective

In its traditional form, Paretian welfare economics has little to say about policies of redistribution. I argue that by adopting a constitutional perspective, elements of a theory of redistribution can be developed without recourse to interpersonal utility comparisons. Individuals who find themselves under an imperfect veil of uncertainty at a constitutional stage face a tradeoff between the costs and benefits of redistribution. The benefits consist of a reduction in the variance of a risk-averse agent's income distribution. The costs are represented by deadweight losses caused either by bureaucracy or by disincentive effects associated with the transfer scheme. My simple formal analysis shows that individuals may, even under an imperfect veil of uncertainty, be able to agree unanimously on a certain transfer policy if their personal characteristics are not too different from each other. This paper is a modified version of a chapter from my Master's thesis, submitted at the University of Bonn in 1992. Revisions were done during a stay at DELTA/Ecole Normale Supérieure, Paris. A scholarship from the German Academic Exchange Service is gratefully acknowledged. I wish to thank Urs Schweizer, Hartmut Kliemt, Niclas Berggren, and an anonymous referee of this journal for valuable comments and suggestions, which have greatly improved the paper.     

Länger leben — Siechtum und Pflege ohne Grenzen?

At present, our society and its social security system are not prepared to cope with the challenges resulting from the continuous increase of life expectancy. The traditional concept of disease has to be modified for serving the special needs of the elderly. The optimistic compression of disease theory is an intriguing model, but lacks prove by available data. The anti-aging boom diverts the focus from the social and financial burden that will be unevitably caused by long-term care in the future. If there will not be an — up to now unforeseeable — breakthrough in research, particularly dementia will have an enormous impact on social cost which is often underestimated.     

Rise in Occupational Mobility Especially Amongst Women and Young People

Original Papers

Rise in Occupational Mobility Especially Amongst Women and Young PeopleSuccessful jobsearch often based on personal initiative     

On a class of law invariant convex risk measures

We consider the class of law invariant convex risk measures with robust representation r_h,p(X)=sup_fò₀¹ [AV@R_s(X)f(s)-f^p(s)h(s)] ds\rho_{h,p}(X)=\sup_{f}\int_{0}^{1} [AV@R_{s}(X)f(s)-f^{p}(s)h(s)]\,ds, where 1≤p<∞ and h is a positive and strictly decreasing function. The supremum is taken over the set of all Radon–Nikodym derivatives corresponding to the set of all probability measures on (0,1] which are absolutely continuous with respect to Lebesgue measure. We provide necessary and sufficient conditions for the position X such that ρ _h,p (X) is real-valued and the supremum is attained. Using variational methods, an explicit formula for the maximizer is given. We exhibit two examples of such risk measures and compare them to the average value at risk.     

Driving forces of chemical risks for the European biodiversity

In the framework of the EU-funded research project ALARM (Assessing LArge-scale environmental Risks with tested Methods), an original method combining the DPSIR (driving forces–pressures–state–impacts–responses) framework and an analysis based on the distinction between the four spheres of sustainability (environmental, economic, social and political) has been developed. This paper presents the application of this method, called “the tetrahedral DPSIR” for the identification and analysis of driving forces of environmental chemicals risks for biodiversity, in Europe. The purpose of this methodology is to help reduce the pressures on biodiversity through modifying the driving forces behind them by offering scientific advice to policy makers. We frame our analysis in the context of the current policy, namely the implementation of REACH (Regulation on the Registration, Evaluation, and Authorization of CHemicals).