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A note on the role of the propensity score for estimating average treatment effects

Hahn [Hahn, J. (1998). On the role of the propensity score in efficient semiparametric estimation of average treatment effects. Econometrica 66:315-331] derived the semiparametric efficiency bounds for estimating the average treatment effect (ATE) and the average treatment effect on the treated (ATET). The variance of ATET depends on whether the propensity score is known or unknown....

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English / 01/05/2004

Aktuelle Trends in der Aussenwirtschaftspolitik der USA: Anlass zur Sorge? / Faut-il s'inquiéter des tendances actuelles de la politique économique extérieure américaine?

In den letzten Jahren haben sich die aussenwirtschaftspolitischen Parameter der USA teilweise stark geändert. Drei augenfällige Trends bestimmen seither die US-amerikanische Aussenwirtschaftspolitik: Erstens fliessen Sicherheitsüberlegungen seit den Terroranschlägen vom 11.September 2001 massiv in aussenwirtschaftliche Regelungen ein; zweitens schenken die USA der regionalen und...

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Deutsch / 01/05/2004

Innovation and risk selection in deregulated social health insurance

One important motive for deregulating social health insurance is to encourage product innovation. For the first time, the cost savings achieved by non-US managed care plans that are attributable to product innovation are estimated, using a novel approach. Panel data from a major Swiss health insurer permits to infer health status, which can be used to predict health care expenditure...

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English / 24/04/2004

Die Haftung im Verein

Der Verein ist für seine Schulden grundsätzlich alleine haftbar. Die Mitglieder haften gegenüber Vereinsgläubigern grundsätzlich nicht persönlich und auch gegenüber dem Verein grundsätzlich nur begrenzt, nämlich bis zur Höhe ihrer Mitgliederbeiträge (Art. 71 und Art. 75a ZGB).

Grundsätzlich haften die Vorstandsmitglieder gegenüber dem Verein aufgrund des
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Deutsch / 15/04/2004

Optimal Insurance Contracts without the Non-Negativity Constraint on Indemnities Revisited

In the literature on optimal indemnity schedules, indemnities are usually restricted to be non-negative. Gollier (1987) shows that this constraint might well bind: insured could get higher expected utility if insurance contracts would allow payments from the insured to the insurer at some losses. However, due to the insurers’ cost function Gollier supposes, the optimal insurance...

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English / 01/04/2004

Ertragspotenziale sichern

Das Zinsdifferenzgeschäft stellt für viele Banken eine wesentliche Ertragssäule dar. Dabei ist naturgemäss die Unsicherheit zukünftiger Zinsen und Zahlungsströme die zentrale Herausforderung im Asset-/Liability-Management jeder Bank. Gerade Bodensatzprodukte bieten ein erhebliches Ertragspotenzial. Konventionelle Ansätze, die solch eine variable Position gemäss einer konstanten...

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Deutsch / 01/04/2004

Taxation of a Venture Capitalist With a Portfolio of Firms

Venture capitalists not only finance but also advise and thereby add value to young entrepreneurial firms. The prospects of venture capital backed firms thus depend on joint efforts of entrepreneurs and informed venture capitalists, and are subject to double moral hazard. For this reason, managerial support and the number of portfolio companies tend to be inefficiently low. This...

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English / 01/04/2004

Start-ups, Venture Capitalists and the Capital Gains Tax

A model of start-up finance with double moral hazard is proposed. Entrepreneurs have ideas and technical competence, but lack own resources as well as commercial experience. Venture capitalists (VCs) provide start-up finance and managerial support. Both types of agents thus jointly contribute to the firm's success, but neither type's effort is verifiable. We find that the...

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English / 01/04/2004

Programme evaluation with multiple treatments

This paper reviews the main identification and estimation strategies for microeconometric policy evaluation. Particular emphasis is laid on evaluating policies consisting of multiple programmes, which is of high relevance in practice. For example, active labour market policies may consist of different training programmes, employment programmes and wage subsidies. Similarly, sickness...

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English / 01/04/2004

The alpa-Beauty Contest: Choosing Numbers, Thinking Intervals

"The 1-shot alpha-beauty contest is a non-equilibrium strategic game under bounded rationality conditions, while equilibrium is approached if the game is played iteratively sufficientlynmany times. Experimental data of the 1-shot setting of the 0-equilibrium game show a common pattern: The spectrum of announced numbers is a superposition of a skew backgroundndistribution and a...

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English / 01/03/2004

Valuing Public Goods: The Life Satisfaction Approach

"This paper discusses a novel approach to elicit people’s preferences fornpublic goods, namely the life satisfaction approach. Reported subjective well-beingndata are used to directly evaluate utility consequences of public goods. The strengthsnof this approach are compared to traditional approaches and identification issues arenaddressed. Moreover, it is applied to...

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English / 01/03/2004

Globalization and General Worker Training

We examine how globalization affects firms incentives to train workers. In our model, firms invest in productivity-enhancing worker training before Cournot competition takes place. When two separated product markets become integrated and are thus replaced with a market with greater demand and greater firm number, training by each firm increases provided the two countries are...

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English / 01/03/2004

Empirical Likelihood in Count Data Models: The Case of Endogenous Regressors

Recent advances in the econometric modelling of count data have often been based on the generalized method of moments (GMM). However, the two-step GMM procedure may perform poorly in small samples, and several empirical likelihood-based estimators have been suggested alternatively. In this paper I discuss empirical likelihood (EL) estimation for count data models with endogenous...

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English / 01/03/2004

Third-party punishment and social norms

We examine the characteristics and relative strength of third-party sanctions in a series of experiments. We hypothesize that egalitarian distribution norms and cooperation norms apply in our experiments, and that third parties, whose economic payoff is unaffected by the norm violation, may be willing to enforce these norms although the enforcement is costly for them. Almost two-...

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English / 01/03/2004

Zu unterschiedlichen Umwandlungssätzen für Frau und Mann in der beruflichen Vorsorge : Zwei Gutachten

Unter dem Gesichtswinkel des Gleichstellungsgesetzes sind im überobligatorischen Bereich unterschiedliche Umwandlungssätze für Frau und Mann zwar zulässig. Erfolgt die Vorsorge aber zusammen mit einem Arbeitsverhältnis, wird dadurch der Anspruch der ArbeitnehmerIn auf gleiche Arbeitsbedingungen für gleiche Arbeit verletzt. Die von einem tieferen Umwandlungssatz betroffene...

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Deutsch / 27/02/2004

Scrutins et elections en association

Dans la plupart des associations, une assemblée principale siège chaque année. Il s'y déroule très souvent des discussions sur la tenue des scrutins et des élections. Ceci est attribuable ä la réglementation légale minimale, ainsi qu'aux dispositions statutaires, parfois difficilement compréhensibles. Le présent article se veut donc une aide en cas de survenue de telles...

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Français / 15/02/2004

Wahlen und Abstimmungen im Verein

In den meisten Vereinen wird alljährlich eine Hauptversammlung durchgeführt. Dabei gibt es sehr oft Diskussionen über die Durchführung von Abstimmungen und Wahlen. Dies ist auf die minimale gesetzliche Regelung und die teilweise schwer verständlichen Statutenbestimmungen zurückzuführen. Der nachfolgende Beitrag soll deshalb eine Hilfe bei derartigen Fragen sein. Die Aufbewahrung...

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Deutsch / 15/02/2004

The Transfer Paradox and Sunspot Equilibria

This paper tests the effect of a matching mechanism on donations in a controlled fieldnexperiment. We match the donations of students at the University of Zurich who, each semester, have to decide whether they wish to contribute to two Social Funds. Our results support thenhypothesis that a matching mechanism increases contributions to a public good. However, the effect depends on...

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English / 01/02/2004

Is Volunteering Rewarding in Itself?

Volunteering constitutes one of the most important pro-social activities.nFollowing Adam Smith, helping others is the way to higher individual well-being. This viewncontrasts with the selfish utility maximizer who avoids costs from helping others. The twonrival views are studied empirically. We find robust evidence that volunteers are morensatisfied with their life than non-...

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English / 01/02/2004

Matching Donations - Subsidizing Charitable Giving in a Field Experiment

This paper tests the effect of a matching mechanism on donations in a controlled fieldnexperiment. We match the donations of students at the University of Zurich who, each semester,nhave to decide whether they wish to contribute to two Social Funds. Our results support thenhypothesis that a matching mechanism increases contributions to a public good. However, theneffect depends on...

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English / 01/02/2004

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