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Granting Birthright Citizenship - A Door Opener to Educational Particiation and Success?

Does birthright citizenship boost immigrant children's participation
and success in the host country's educational system? We address this
question using a reform of the German naturalization law in 1999 that
entitled children born after January 1, 2000 to birthright citizenship.
We use a difference-in-difference design that compares children born...

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English / 11/12/2014

Mut zur Meinungsäusserung

Wie bringt man seine zahlreichen beruflichen Verpflichtungen ­unter einen Hut? Wie schafft man den Übergang zur Pensionierung? Diese und ­andere Fragen beantwortet Monika Bütler im Gespräch.

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Deutsch / 01/12/2014

Can't Buy Mommy's Love? Universal Childcare and Children's Long-Term Cognitive Development

What happens to children's long-run cognitive development when introducing universal high-quality childcare for 3-year-olds mainly crowds out family care? To answer this question, we take advantage of a sizeable expansion of publicly subsidized full-time high-quality childcare for 3-year-olds in Spain in the early 1990s. Identification relies on variation in the initial speed of...

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English / 29/10/2014

When Does Time Matter? Maternal Employment, Children's Time With Parents, and Child Development

This study tests the two assumptions underlying popularly held notions that
maternal employment negatively affects children because it reduces time spent with parents: (1) that maternal employment reduces children's time with parents, and (2) that time with parents affects child outcomes. We analyze children's time-diary data from the Child Development Supplement of...

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English / 29/10/2014

After-School Care and Children's Cognitive and Non-Cognitive Skills

What is the impact of after-school center-based care on the development of primary school-aged children? Answering this question is challenging due to non-random selection of children into after-school center-based care. We tackle this challenge using detailed data of the German Child Panel and employing a value-added method. While we do not find significant effects on average, our...

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English / 01/10/2014

Does Early Child Care Help or Hurt Children's Development?

More children than ever attend center-based care early in life. We study whether children who attend center-based care before age 3 have better or worse language and motor skills, socio-emotional maturity, and school readiness just before entering primary school. In data covering about 36,000 children in one West German state, we use a marginal treatment effects framework to show how...

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English / 30/09/2014

A test of the conditional independence assumption in sample selection models

Identification in most sample selection models depends on the independence of the regressors and the error terms conditional on the selection probability. All quantile and mean functions are parallel in these models; this implies that quantile estimators cannot reveal any - per assumption non-existing - heterogeneity. Quantile estimators are nevertheless useful for testing the...

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English / 10/09/2014

Radius matching on the propensity score with bias adjustment: finite sample behaviour, tuning parameters and software implementation

Using a simulation design that is based on empirical data, a recent study by Huber, Lechner and Wunsch (2012) finds that distance-weighted radius matching with bias adjustment as proposed in Lechner, Miquel and Wunsch (2011) is competitive among a broad range of propensity score-based estimators used to correct for mean differences due to observable covariates. In this paper, we...

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English / 02/08/2014

Ambivalente Massnahmen: Wohlfahrtsstaatliche Reformen und ihre Auswirkungen

Rechtliche Interventionen mit sozialpolitischer Zielsetzung im Binnenraum privater Lebensformen zeitigen neben den beabsichtigten auch ungewollte und unerwünschte Wirkungen. Dies lässt sich am Beispiel zweier jüngerer gleichstellungspolitisch motivierter Sozial- und Familienrechtsreformen zeigen, die bei näherem Hinschauen widersprüchliche Anreize senden. Diese sind unter anderem...

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Deutsch / 01/08/2014

Les réformes de l'Etat-providence et leurs conséquences ambivalentes

Les réformes de société peuvent parfois produire des effets indésirables. Il est possible d'illustrer ce constat en examinant deux réformes récentes dans le domaine de la politique sociale et familiale. Motivées par un souci de promouvoir l'égalité entre les sexes, ces réformes ont créé des incitations contradictoires. L'explication réside notamment dans la coexistence...

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Français / 01/08/2014

Causal pitfalls in the decomposition of wage gaps

The decomposition of gender or ethnic wage gaps into explained and unexplained components (often with the aim to assess labor market discrimination) has been a major research agenda in empirical labor economics. This paper demonstrates that conventional decompositions, no matter whether linear or non-parametric, are equivalent to assuming a (probably too) simplistic model of...

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English / 10/07/2014

The tempest: Natural disasters, Early Shocks and Children's Short- and Long-Run Development

Socio-economic shocks during early childhood are predicted to have detrimental short- and long-run consequences for children's development. We examine this hypothesis using a specific shock: housing damages caused by a super-typhoon. Comparing children, who lived in the same district, but only some experienced housing damages, we can isolate the real-estate shock from any...

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English / 01/07/2014

Combining Matching and Nonparametric Instrumental Variable estimation: Theory and an Application to the Evaluation of Active Labour Market Policies : Appendix

We show how instrumental variable and matching estimators can be combined in order to identify a broader array of treatment effects. Instrumental variable (IV) estimators are known to estimate effects only for the compliers, representing a subset of the entire population. By combining IV with matching, we can estimate the treatment effects for the always- and never-takers as well....

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English / 14/06/2014

A Jackknife-Type Estimator for Portfolio Revision

This paper proposes a novel approach to portfolio revision. The current literature
on portfolio optimization uses a somewhat naïve approach, where portfolio weights are always completely revised after a predefined fixed period. However, one shortcoming of this procedure is that it ignores parameter uncertainty in the estimated portfolio weights, as well as the biasedness of the...

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English / 01/06/2014

Regional Differences in Perceived Corruption among Ukrainian Firms

This paper investigates regional differences in the perception of corruption and informal practices among Ukrainian firms. Using two different data sets from Ukraine we show that perceived corruption differs significantly across regions, even when taking into account the size, industry, workforce composition, and other characteristics of the firms based on propensity score matching....

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English / 09/05/2014

Sensitivity checks for the local average treatment effect

The nonparametric identification of the local average treatment effect (LATE) hinges on the satisfaction of three instrumental variable assumptions: (1) unconfounded assignment of the instrument, (2) no average direct effect of the instrument on the outcome within compliance types (exclusion restriction), and (3) weak monotonicity of the treatment in the instrument. While (1) often...

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English / 01/05/2014

Treatment evaluation with multiple outcome periods under endogeneity and attrition

This paper develops a nonparametric methodology for treatment evaluation with multiple outcome periods under treatment endogeneity and missing outcomes. We use instrumental variables, pre-treatment characteristics, and short-term (or intermediate) outcomes to identify the average treatment effect on the outcomes of compliers (the subpopulation whose treatment reacts on the instrument...

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English / 01/03/2014

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