1. ZEW Discussion Paper Nr. 25-039 // 2025

    Auctions vs. Negotiations: The Role of Communication in an Experiment With Procurement Managers

    We investigate how buyer-supplier communication affects procurement prices, comparing auctions without direct communication to negotiations allowing it. In controlled experiments involving students and…

  2. ZEW-Finanzmarktreport // 2025

    August 2025

    • Erwartungen trüben sich nach angekündigtem EU-US-Handelsabkommen ein
    • Eurozone: Spürbarer Rückgang der Konjunkturerwartungen
    • USA: Zinssenkungserwartungen verstärken sich
    • China: Konjunkturlage normalisiert sich
    • Erwart…
  3. ZEW policy brief Nr. 25-08 // 2025

    The Anatomy of Chinese Innovation: Insights on Patent Quality and Ownership

    China’s patenting activity has surged over the past two decades, yet questions remain about the quality and sources of innovation. We develop a new method to measure the importance of a patent for innovation,…

  4. ZEW-Branchenreport Informationswirtschaft // 2025

    2. Quartal 2025

    • Getrübte Stimmung in der Informationswirtschaft
    • Unternehmen planen keine Abkehr vom Homeoffice
  5. ZEW Discussion Paper Nr. 25-041 // 2025

    Biodiversity Engel Curves: Estimating How Income and Inequality Shape Consumption- Driven Biodiversity Loss

    We examine the relationship between household incomes and the biodiversity footprints of consumption in the United States from 1996 to 2022. Combining detailed household expenditure surveys…

  6. ZEW policy brief Nr. 25-03 // 2025

    Better Safe than Sorry? Toxic Waste Management after Union Elections

    U.S. manufacturing facilities generate approximately 30 billion pounds of hazardous waste annually, 10% of which is released into the environment. The negative economic and health impacts of such toxic chemicals…

  7. ZEW Discussion Paper Nr. 25-040 // 2025

    Beyond Content: Investors’ Chatter, Interaction and Earnings Announcement Returns

    We study the relationship between investors’ social media activity and earnings announcement returns. To distinguish between information contained in peer-to-peer interaction and user-posted content, we analyze…

  8. ZEW Monthly // 2025

    07/2025 – Daten

    Daten sind der Treibstoff der digitalen Wirtschaft – sie ermöglichen neue Geschäftsmodelle, treiben Innovationen voran und verändern Entscheidungsprozesse grundlegend. Doch wie lässt sich aus der Datenflut…