1. ZEW policy brief Nr. 20-02 // 2020

    Covid-19-Krise und die erwarteten Auswirkungen auf F&E in Unternehmen

    Die Maßnahmen zur Verlangsamung der Verbreitung des Covid-19-Erregers haben die Weltwirtschaft in weiten Teilen zum Erliegen gebracht. Dies wird in Deutschland sowie in vielen anderen Ländern zu einer tiefen…

  2. Referierte Fachzeitschrift // 2020

    Public Procurement of Innovation: Evidence from a German Legislative Reform

    Using public procurement to promote private innovation activities has attracted increasing attention recently. Germany implemented a legal change in its procurement framework in 2009, which allowed government…

  3. ZEW Discussion Paper Nr. 20-018 // 2020

    R&D Investment Under Financing Constraints

    This paper tests for the sensitivity of R&D to financing constraints conditional on restrictions in external financing. Financing constraints of firms are identified by an exogenously calculated rating index.…

  4. ZEW Discussion Paper Nr. 20-017 // 2020

    On Event Studies and Distributed-Lags in Two-Way Fixed Effects Models: Identification, Equivalence, and Generalization

    We discuss important properties and pitfalls of panel-data event study designs. We derive three main results. First, binning of effect window endpoints is a practical necessity and key for identification of…

  5. ZEW Discussion Paper Nr. 20-016 // 2020

    Fiscal and Individual Rates of Return to University Education With and Without Graduation

    Based on a detailed model of the German tax-benefit system, this paper simulates private and fiscal returns to education for college graduates and college dropouts. Completing a five-year college degree is found…

  6. ZEW Discussion Paper Nr. 20-015 // 2020

    The Ratchet Effect in Social Dilemmas

    In this paper, we investigate whether dynamic incentive schemes lead to a ratchet effect in a social dilemma. We test whether subjects strategically restrict their contribution levels at the beginning of a…

  7. ZEW-Kurzexpertise Nr. 20-04 // 2020

    Europäische Finanzinstrumente in der Corona-Krise

    Die COVID-19-Pandemie ist nicht nur eine humanitäre Krise, sondern auch ein einschneidendes ökonomisches Krisenereignis. Die ökonomischen und finanziellen Folgen sind derzeit nicht seriös abschätzbar und hängen…

  8. ZEW Discussion Paper Nr. 20-014 // 2020

    A Small Volume Reduction that Melts Down the Market: Auctions with Endogenous Rationing

    Auctions with endogenous rationing have been introduced to stimulate competition. Such (procurement) auctions reduce the volume put out to tender when competition is low. This paper finds a strong negative…

  9. ZEW Discussion Paper Nr. 20-013 // 2020

    The Evolution of Inequality of Opportunity in Germany: A Machine Learning Approach

    We show that measures of inequality of opportunity (IOP) fully consistent with Roemer (1998)'s IOP theory can be straightforwardly estimated by adopting a machine learning approach, and apply our novel method to…