Publications of the Research Unit Digital Economy

  1. Refereed Journal // 2008

    Two-Level CES Production Technology in the Solow and Diamond Growth Models

    The two-level CES aggregate production function - that nests a CES into another CES function - has recently been used extensively in theoretical and empirical applications of macroeconomics. We examine the…

  2. Refereed Journal // 2008

    Calibration of normalised CES production functions in dynamic models

    Normalising CES production functions in the calibration of basic dynamic models allows to choose technology parameters in an economically plausible way. When varia- tions in the elasticity of substitution are…

  3. ZEW Discussion Paper No. 07-087 // 2007

    Does IT Outsourcing Increase Firm Success? An Empirical Assessment using Firm-Level Data

    Using German firm-level data, an endogenous switching regression model within a production function framework is estimated in order to explore differences in labor productivity between IT outsourcing and non-IT…

  4. ZEW Discussion Paper No. 07-086 // 2007

    Durable Goods, Innovation and Network Externalities

    We develop a model of R&D competition between an incumbent and a potential entrant with network externalities and durable goods. We show that the threat of entry eliminates the commitment problem that an…

  5. ZEW Discussion Paper No. 07-074 // 2007

    Determinants of Child Care Participation

    When estimating the determinants of child care participation, the simultaneity in mothers' decision to work and in the decision to use child care is a major challenge. In this study, we provide evidence on the…