ZEW Discussion Papers

Researchers at the ZEW participate in scientific debates by publishing their papers. The papers are predominantly in English (marked). For the German papers an English abstract is available. The contributions are intended for a final publication in special interest titles. The discussion papers can be downloaded as PDF or PostScript files starting from 1.1.1998. They aimed at national and international target groups.

  1. ZEW Discussion Paper No. 25-069 // 2025

    To Release or Not to Release? Preferences for Home Equity Products in Retirement

    How do retirees choose among home equity release products? Despite housing wealth being households’ largest asset, little is known about preferences for different equity release products. We conduct a survey…

  2. ZEW Discussion Paper No. 25-068 // 2025

    VAT Collection Only at the Retail Stage: Evidence on Tax Compliance

    We investigate whether firms engage in VAT evasion at the retail stage—typically a point of weakness in VAT systems—in a high-enforcement, low-informality setting. To measure evasion, we exploit a reform of VAT…

  3. ZEW Discussion Paper No. 25-067 // 2025

    Harnessing Deductions to Increase Tax Compliance and Formalization

    We evaluate a tax reform in Ecuador that introduced generous deductions from personal income taxes (PIT), encouraging consumers to request receipts. The reform addresses tax evasion by targeting small…

  4. ZEW Discussion Paper No. 25-066 // 2025

    Effects of the Reverse Charge Mechanism on VAT Gaps

    The purpose of this paper is to evaluate the effect of reverse-charge mechanism (RCM) implementation on VAT compliance using an overall, countrylevel measure of VAT compliance, the VAT gap. The VAT gap is…

  5. ZEW Discussion Paper No. 25-065 // 2025

    Fair Market Value of Used Capacity Assets: Forecasts for Repurposed Electric Vehicle Batteries

    In response to growing economic and environmental concerns, companies in a range of industries seek to repurpose products (assets) that retain functional capacity beyond their initial first life. This paper…

  6. ZEW Discussion Paper No. 25-063 // 2025

    Financial Socialization and the Gender Investment Gap

    Women are significantly less likely to participate in the stock market than men. We show that financial socialization plays an important role in explaining this gap. Survey data from Germany and the U.S.…

  7. ZEW Discussion Paper No. 25-062 // 2025

    Intangible Assets and Productivity at the Firm Level: R&D versus non-R&D Intangibles

    Intangible assets have increasingly been identified as a main source of productivity gains. Since the pioneering work by Corrado, Hulten, and Sichel (2005), empirical research has largely focused on macro and…

  8. ZEW Discussion Paper No. 25-061 // 2025

    Firms’ Disclosure of University Ties on Their Website: An Explorative Analysis of Ist Role for Innovation Performance

    This paper explores a novel web-based indicator to examine how firms’ disclosure of university ties on their websites shapes their innovation performance. First, using data from the German Community Innovation…

  9. ZEW Discussion Paper No. 25-060 // 2025

    Do Energy-Saving Nudges Deliver During High-Price Periods? Field Experimental Evidence From the European Energy Crisis

    Urged by the European Energy Crisis and the threatening consequences of severe natural gas shortages, energy providers launched gas-saving initiatives incorporating financial incentives to reduce residential…

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