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News shocks and learning-by-doing

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  • Qureshi Hammad

    (The Brattle Group, 1850 M Street NW, Washington, DC 20036, USA)

Abstract

The idea that expectations about future economic fundamentals can drive business cycles dates back to the early 20th century. However, the standard real business cycle (RBC) model fails to generate positive comovement in output, consumption, labor-hours and investment in response to news shocks. This paper proposes a simple and intuitive solution to this puzzling feature of the RBC model, based on a mechanism that has strong empirical support: learning-by-doing (LBD). First, we show that the one-sector RBC model augmented by LBD can generate aggregate comovement in response to news shock about technology. Second, we show that in the two-sector RBC model, LBD along with an intratemporal adjustment cost can generate sectoral comovement in response to news about three types of shocks: i) neutral technology shock, ii) consumption technology shock, and iii) investment technology shock. We show that these results hold for contemporaneous technology shocks and for different specifications of LBD.

Suggested Citation

  • Qureshi Hammad, 2014. "News shocks and learning-by-doing," The B.E. Journal of Macroeconomics, De Gruyter, vol. 14(1), pages 205-240, January.
  • Handle: RePEc:bpj:bejmac:v:14:y:2014:i:1:p:36:n:6
    DOI: 10.1515/bejm-2012-0076
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    References listed on IDEAS

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