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Bounds on Counterfactual Distributions Under Semi-Monotonicity Constraints

This paper explores semi-monotonicity constraints in the distribution of potential outcomes, first, conditional on an instrument, and second, in terms of the response function. The imposed assumptions are strictly weaker than traditional instrumental variables assumptions and can be gainfully employed to bound the counterfactual distributions, even though point identification is only...

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English / 01/12/2009

Why do firms train apprentices? The net cost puzzle reconsidered

This paper analyses the impact of increasing the share of apprentices at the cost of the share of unskilled or semi-skilled employees on establishment performance. We use representative matched employer–employee panel data and correct for estimation biases. We show that an increase of the apprentice share in trade, commercial, craft or construction occupations has a positive impact...

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English / 01/12/2009

Unternehmen mögen Ökologie: Lieber grün kleiden als Greenpeace auf dem Dach (Rezension)

Das Konzept der sozialen und ökologischen Verantwortungsübernahme von Unternehmen - auf Neudeutsch: "Corporate Social Responsibility (CSR)" - hat sich in den vergangenen Jahren fest etabliert im Kanon der Managementkonzepte. Unternehmen legen sich CSR-Abteilungen zu, verfassen Nachhaltigkeitsberichte und unterwerfen sich sozialen und ökologischen Standards. Warum aber tun...

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Deutsch / 30/11/2009

Nachhaltigkeit im eigenen Betrieb: Eine Umfrage unter Schweizer Unternehmen

In der Erhebung wurde unter anderem ermittelt, wie es Schweizer Unternehmen mit der Nachhaltigkeit halten.

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Deutsch / 04/11/2009

Die deutsche Börsen- und Indexlandschaft und der Markt für Abschlussprüfungen: eine empirische Studie zu langfristigen Konzentrationstendenzen auf dem Wirtschaftsprüfermarkt

Die in den letzten Jahren veröffentlichten Studien zur Anbieterkonzentration auf dem Markt für Abschlussprüfungen in Deutschland stellten ein hohes Maß an Konzentration fest. Die vorgelegten Arbeiten beschränkten sich dabei i.d. R. auf eine statische oder komparativ-statische Analyse und damit auf eine Konzentrationsmessung einzelner Jahre. Ziel des vorliegenden Beitrags ist eine...

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Deutsch / 01/11/2009

Communal Service Delivery: How Customers Benefit from Participation in Firm-hosted Virtual P3 Communities.

Firm-hosted virtual peer-to-peer problem solving (P3) communities offer a low-cost, credible, and effective means of delivering education and ongoing assistance services to customers of complex, frequently evolving products. Building upon the social constructivist view on learning and drawing from literature on the firm-customer relationship in services marketing, we distinguish...

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English / 01/11/2009

Are there waves in merger activity after all?

This paper investigates the merger wave hypothesis for the US and the UK employing a Markov regime-switching model. Using quarterly data covering the last 30 years, for the US, we identify the beginning of a merger wave in the mid 1990s but not the much-discussed 1980s merger wave. We argue that the latter finding can be ascribed to the refined methods of inference offered by the...

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English / 01/11/2009

In search of stars: Network formation among heterogeneous agents

This paper reports results from a laboratory experiment on network formation among heterogeneous agents. The experimental design extends the Bala-Goyal (2000) model of network formation with decay and two-way flow of benefits by introducing agents with lower linking costs or higher benefits to others. Furthermore, agents' types may be common knowledge or private information. In...

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English / 01/11/2009

Real exchange rates and real interest rate differentials: A present value interpretation

Although the real exchange rate–real interest rate (RERI) relationship is central to most open economy macroeconomic models, empirical support for the relationship is generally found to be rather weak. In this paper we re-investigate the RERI relationship using bilateral US real exchange rate data spanning the period 1978–2007. Instead of testing one particular model, we build on...

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English / 01/11/2009

On the Impossibility of Core-Selecting Auctions

When goods are substitutes, the Vickrey auction produces efficient, core outcomes that yield competitive seller revenues. In contrast, with complements, the Vickrey outcome, while efficient, is not necessarily in the core and revenue can be very low. Non-core outcomes may be perceived as unfair since there are bidders willing to pay more than the winners' payments. Moreover, non...

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English / 01/11/2009

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