Studienmotivation, Erwerbspartizipation und der Einstieg in den Arbeitsmarkt

Increased student enrollment in public universities has led to a debate on curricula reform with a view to limiting the length of study, particularly by introducing tuition fees for long-time students. It is implicitly assumed in this debate that all students are full-time students. We investigate why and to what extent students participate in the labor market. Furthermore, we study the effects of part-time work on the time it takes to graduate, to find employment and on the level of earnings. We analyze two data sets, first, a survey among students enrolled at the University of Bern conducted during summer 2001 (N = 3360) and secondly, a survey of all university graduates in Switzerland conducted in 2001 (N = 7005). The results show that labor market participation increases the time it takes students to reach graduation. However, labor market experience reduces the time it takes graduates to find employment and increases their earnings by 4 percent if their experience was related to the subject being studied. Labor market participation bearing no relation to university studies has no negative effects on graduate entrance into the labor market. Thus, the study suggests that student participation in the labor market has more beneficial effects than disadvantages. In light of these results curricula reforms should take into account the possibility of gaining labor market experience.     

Nonparametric validation of similar distributions and assessment of goodness of fit

In this paper the problem of assessing the similarity of two cumulative distribution functions F and G is considered. An asymptotic test based on an α-trimmed version of Mallows distance Γ_α( F , G ) between F and G is suggested, thus demonstrating the similarity of F and G within a preassigned Γ_α( F , G ) neighbourhood at a controlled type I error rate. The test proposed is applied to the validation of goodness of fit and for the nonparametric assessment of bioequivalence. It is shown that Γ_α( F , G ) can be interpreted as average and population equivalence. Our approach is illustrated by various examples.     

Minimax Rates for Estimating the Variance and its Derivatives in Non–Parametric Regression

In this paper the van Trees inequality is applied to obtain lower bounds for the quadratic risk of estimators for the variance function and its derivatives in non–parametric regression models. This approach yields a much simpler proof compared to previously applied methods for minimax rates. Furthermore, the informative properties of the van Trees inequality reveal why the optimal rates for estimating the variance are not affected by the smoothness of the signal g . A Fourier series estimator is constructed which achieves the optimal rates. Finally, a second–order correction is derived which suggests that the initial estimator of g must be undersmoothed for the estimation of the variance.     

On 'class exploitation' in Canada†

Two things make Carl Cuneo's recent (1978) paper on 'rates of exploitation' in Canada remarkable. The first is the magnitudes involved. Cuneo's preferred measure of surplus value (RSV₇), for instance, shows a more than seven-fold increase from 1917 to 1971, indicating a quite spectacular shift in favour of capital in relative income shares in Canadian manufacturing industry. The second thing that makes Cuneo's paper remarkable is the extent to which his findings are inconsistent with findings on income shares reported by 'bourgeois' economists. In a survey of the literature Pen (1971: 164 ff.), for example, reports that in the advanced capitalist economies, the share of income accruing to labour in the economy as a whole has increased substantially and that even if one confines one's attention to the private sector the share of manual workers has not decreased but remained more or less constant in spite of the relative decline in their numbers.¹ Now, it is true that the studies reviewed by Pen approach the problem of income shares with the categories of 'bourgeois' economics while Cuneo approaches the problem with what he regards as Marxist categories, and it is conceivable that this might have accounted for the radical difference in the findings. But still, differences of such magnitude in the trends reported in the shares of capital and labour both give pause and urge a close scrutiny.     

National pension systems and mass opinion: a case study of confidence, satisfaction and political attitudes in Norway

It is commonly assumed that popular support for national pension systems depends on widespread satisfaction with projected benefit levels among the working age population, and in particular that public support for the system will be jeopardised if the taxpayers do not feel confident about eventually receiving the promised benefits. On the basis of Norwegian survey data, two sets of questions are addressed in the article: (1) Is there a widespread lack of confidence in and satisfaction with the Norwegian National Insurance pension scheme? and (2) Is there an association between confidence and satisfaction and people's political attitudes towards the National Insurance pension scheme? Although we do not find any signs of a dramatic erosion of confidence towards the system, we do find that overall satisfaction with projected benefits is low among the working age population. Contrary to what one might expect, however, confidence and satisfaction from the point of view of individual interests appear not to be associated with a political preference for privatisation.     

Calling social capital: An analysis of the determinants of success on the TV quiz show “Who Wants to Be a Millionaire?”

This paper analyzes the determinants of successful participation of candidates on the well known television quiz show “Who Wants to Be a Millionaire?”. Our study includes a survey of 660 contestants who participated in the German version of the show between 1999 and 2007. We are particularly interested in two hypotheses. The first hypothesis refers to the assumed advantage of social capital. Contestants on the show have the option of calling a friend (the phone-a-friend lifeline) whom they select from their personal networks. The person chosen to be the phone-a-friend lifeline should be especially helpful if the contestant has a large network of able contacts from which to choose. Second, according to human capital theory the participants’ education should increase the chances of success and should lead on average to higher payoffs. Since contestants on the show can answer questions correctly mainly on the basis of their knowledge and since other characteristics of the candidates are irrelevant, estimates of the human capital effect are not affected by other possible causes suggested by signaling theory. Thus, our analysis is an assessment of the effects of social capital and human capital on the show.     

Valuing mortality risk reductions from environmental, transport, and health policies: a global meta-analysis of stated preference studies

We conduct, to our knowledge, the first global meta-analysis (MA) of stated preference (SP) surveys of mortality risk valuation. The surveys ask adults their willingness to pay (WTP) for small reductions in mortality risks, deriving estimates of the sample mean value of statistical life (VSL) for environmental, health, and transport policies. We explain the variation in VSL estimates by differences in the characteristics of the SP methodologies applied, the population affected, and the characteristics of the mortality risks valued, including the magnitude of the risk change. The mean (median) VSL in our full data set of VSL sample means was found to be around $7.4 million (2.4 million) (2005 U.S. dollars). The most important variables explaining the variation in VSL are gross domestic product (GDP) per capita and the magnitude of the risk change valued. According to theory, however, VSL should be independent of the risk change. We discuss and test a range of quality screening criteria in order to investigate the effect of limiting the MA to high-quality studies. When limiting the MA to studies that find statistically significant differences in WTP using external or internal scope tests (without requiring strict proportionality), we find that mean VSL from studies that pass both tests tend to be less sensitive to the magnitude of the risk change. Mean VSL also tends to decrease when stricter screening criteria are applied. For many of our screened models, we find a VSL income elasticity of 0.7-0.9, which is reduced to 0.3-0.4 for some subsets of the data that satisfy scope tests or use the same high-quality survey.     

The Performance Effects of an Ability-Based Approach to Goal Assignment

Some organizations have begun to target their goal-setting method more closely to the ability levels of their employees. In this article, we report the results of a laboratory study of 138 undergraduate students, which shows that these “ability-based” goals are more effective at improving performance than a “one goal for all” approach, where everyone is assigned the same performance target. Results from repeated measure tests and other analysis of variance tests show that lower-ability individuals in the ability-based goal condition outperform those in the one goal for all condition. Lower- and moderate-ability participants in the one goal for all condition also experienced larger decreases in performance in later rounds.