In this paper we investigate households demand for school meals using a stated preferences approach. Data are collected through phone-structured interviews to 905 residents with children in the German-speaking region of Switzerland during 2007. A Poisson model with random effects is used to explore factors affecting the demand for meals at school. The results show that meals price, household...
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We study how the prevailing internal organization of the family affected the initial design of pension systems. Our theoretical framework predicts that, in society with weak family ties, pensions systems were introduced to act as a safety net, while in societies with strong ties they replicate the tight link between generations by providing generous benefits. Using a historical...
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In: Journal of the American society for information science and technology, 2012, vol. 63, no. 2, p. 354–365
The goal in blog search is to rank blogs according to their recurrent relevance to the topic of the query. State-of-the-art approaches view it as an expert search or resource selection problem. We investigate the effect of content-based similarity between posts on the performance of the retrieval system. We test two different approaches for smoothing (regularizing) relevance scores of posts...
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In Switzerland, nursing home services are mainly provided by regulated public and private nonprofit organizations. Some of them are created by local governments as foundations. This provides a unique setting to analyze the impact of the institutional form on the performance of nursing homes. We propose a model where the institutional form is represented as a legal constraint which affects...
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In: Empirical economics, 2012, vol. 42, no. 2, p. 471-486
Because of bacterial resistance, current antibiotic consumption is reinforced by past use, and future utility is lower. The purpose of this article is to provide evidence on habit and addictive behavior toward antibiotics by exploring variations in the average consumption of antibiotics across 20 Italian regions. Using a balanced panel data set (2000–2009), we estimate myopic and rational...
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In: Proceedings of the 15th European Conference of Developmental Psychology, 2012, p. 301-306
The present investigation has examined 3 to 6 year old children’s “why” questions and their communicative functions in family conversations. Children’s why questions included in thirty videorecordings of dinnertime interactions, held by Italian and Swiss families, were analyzed. In this investigation, the presence of two fundamental functions of children’s why questions,...
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In: Journal of econometrics, 2012, vol. 167, no. 1, p. 197-210
We characterize the robustness of subsampling procedures by deriving a formula for the breakdown point of subsampling quantiles. This breakdown point can be very low for moderate subsampling block sizes, which implies the fragility of subsampling procedures, even when they are applied to robust statistics. This instability arises also for data driven block size selection procedures minimizing ...
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In: Journal of transport economics and policy, 2012, vol. 46, no. 1, p. 51-66
Efficiency measurement in public transport requires an adequate account of unobserved network characteristics that are typically modelled as factors separable from the production process. This paper proposes a panel data model that allows for non-separable firm-specific heterogeneity in an input distance function. The proposed model is applied to a sample of German and Swiss urban transit...
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In: The journal of finance, 2006, vol. 61, no. 2, p. 921-956
The paper argues that the market significantly overvalues firms with severely underfunded pension plans. These companies earn lower stock returns than firms with healthier pension plans for at least 5 years after the first emergence of the underfunding. The low returns are not explained by risk, price momentum, earnings momentum, or accruals. Further, the evidence suggests that investors do...
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In: Journal of empirical finance, 2009, vol. 16, no. 4, p. 537-556
We amend the conditional CAPM to allow for unobservable long-run changes in risk factor loadings. In this environment, investors rationally “learn” the long-run level of factor loadings from the observation of realized returns. As a consequence of this assumption, we model conditional betas using the Kalman filter. Because of its focus on low-frequency variation in betas, our approach...
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