Fear of model misspecification and the robustness premium
Robust decision making implies welfare costs or robustness premia when the approximating model is the true data generating process. To examine the importance of these premia at the aggregate level we employ a simple two-sector dynamic general equilibrium model with human capital and introduce an additional form of precautionary be- havior. The latter arises from the robust decision maker's ability to reduce the effects of model misspecification through allocating time and existing human capital to this end. We find that the extent of the robustness premia critically depends on the productivity of time rela- tive to that of human capital. When the relative efficiency of time is low, despite transitory welfare costs, there are gains from following ro- bust policies in the long-run. In contrast, high relative productivity of time implies misallocation costs that remain even in the long-run. Fi- nally, depending on the technology used to reduce model uncertainty, we find that while increasing the fear of model misspecification leads to a net increase in precautionary behavior, investment and output can fall.
|Date of creation:||Sep 2010|
|Date of revision:|
|Contact details of provider:|| Postal: |
Phone: 0141 330 4618
Fax: 0141 330 4940
Web page: http://www.gla.ac.uk/schools/business/research/
More information through EDIRC
References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- Hansen, Lars Peter & Sargent, Thomas J & Tallarini, Thomas D, Jr, 1999.
"Robust Permanent Income and Pricing,"
Review of Economic Studies,
Wiley Blackwell, vol. 66(4), pages 873-907, October.
- Lars Peter Hansen & Thomas J. Sargent & Thomas D. Tallarini Jr., 1997. "Robust Permanent Income and Pricing," Levine's Working Paper Archive 596, David K. Levine.
- Lars Hansen & Thomas Sargent & Thomas Tallarini, . "Robust Permanent Income and Pricing," GSIA Working Papers 1997-51, Carnegie Mellon University, Tepper School of Business.
- Dennis, Richard, 2010. "How robustness can lower the cost of discretion," Journal of Monetary Economics, Elsevier, vol. 57(6), pages 653-667, September.
- David N. DeJong & Beth F. Ingram, 2001. "The Cyclical Behavior of Skill Acquisition," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 4(3), pages 536-561, July.
- Timothy Cogley & Riccardo Colacito & Lars Peter Hansen & Thomas J. Sargent, 2008. "Robustness and U.S. Monetary Policy Experimentation," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 40(8), pages 1599-1623, December.
- Thomas J. Sargent & LarsPeter Hansen, 2001. "Robust Control and Model Uncertainty," American Economic Review, American Economic Association, vol. 91(2), pages 60-66, May.
- Leitemo, Kai & Söderström, Ulf, 2005.
"Robust Monetary Policy in a Small Open Economy,"
CEPR Discussion Papers
5071, C.E.P.R. Discussion Papers.
- Leitemo , Kai & Söderström , Ulf, 2005. "Robust monetary policy in a small open economy," Research Discussion Papers 20/2005, Bank of Finland.
- Kai Leitemo & Ulf Söderstrom, 2005. "Robust Monetary Policy in a Small Open Economy," Working Papers 290, IGIER (Innocenzo Gasparini Institute for Economic Research), Bocconi University.
- Perli, Roberto & Sakellaris, Plutarchos, 1998. "Human capital formation and business cycle persistence," Journal of Monetary Economics, Elsevier, vol. 42(1), pages 67-92, June.
- Mankiw, N Gregory & Romer, David & Weil, David N, 1992.
"A Contribution to the Empirics of Economic Growth,"
The Quarterly Journal of Economics,
MIT Press, vol. 107(2), pages 407-37, May.
- Hans M. Amman & David A. Kendrick, . "Computational Economics," Online economics textbooks, SUNY-Oswego, Department of Economics, number comp1, September.
When requesting a correction, please mention this item's handle: RePEc:gla:glaewp:2010_24. See general information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Jeanette Findlay)
If references are entirely missing, you can add them using this form.