Robust Discretionary Monetary Policy under Cost-Push Shock Uncertainty of Iran’s Economy

Authors

Department of Economics, University of Isfahan, Isfahan, Iran

Abstract

T





here is always uncertainty about the soundness of an economic model’s structure and parameters. Therefore, central banks normally face with uncertainty about the key economic explanatory relationships. So, policymaker should take into account the uncertainty in formulating monetary policies. The present study is aimed to examine robust optimal monetary policy under uncertainty, by a cost-push shock to the Iran’s economy. For this purpose, three new-Keynesian Phillips curve equations are used, and robust discretionary optimal monetary policy is formulated by employing Hansen and Sargent robust control approach (2002). In all three curve equations, robust discretionary monetary policy is more aggressive comparing to the rational expectations. Considering the last period inflation rate in New- Keynesian Phillips curve, the degree of aggressiveness of robust monetary policy reduces, and with reducing the weight of the last period inflation rate, more reduction in the degree of aggressiveness of monetary policy is observed. On one hand, in all three models, with increasing the weight of inflation in the loss function of monetary policymakers, robust monetary policy is still more aggressive than the monetary policy under certainty. On the other hand, the degree of aggressiveness of monetary policy decreases, while the expected loss increases.
 

Keywords

References

Blinder, A. (1997). Distinguished Lecture on Economics in Government: What Central Bankers Could Learn from Academics and Vice Versa? Journal of Economic Perspectives, 11, 3–19.
Brainard, W. (1967). Uncertainty and Effectiveness of Policy. American Economic Review, 57(2), 411–425.
Clarida, R, Galı´, J., & Gertler, M. (1999). The Science of Monetary Policy: A New Keynesian Perspective. Journal of Economic Literature, 37, 1661–1707.
Dargahi, H., & Sharbat Oghli, R. (2010), Determination of A Monetary Policy Rule Under Stable Inflation Circumstances in the Iranian Economy Using Optimal Control Method. Economic Research Journal, 93, 1–27.
Giannoni, M. (2002). Does Model Uncertainty Justify Caution? Robust Optimal Monetary Policy in a Forward-Looking Model. Macroeconomic Dynamics, 6, 111–144.
Giordani, P., & Soderlind, P. (2004). Solution of Macro Models with Hansen–Sargent Robust Policies: Some Extensions. Journal of Economic Dynamics & Control,28, 2367 – 2397.
Hansen, L. P., & Sargent, T. J. (2002). Robust Control and Model Uncertainty in Macroeconomics. Stanford University Manuscript, Retrieved from
http://www.jstor.org/stable/pdf/2677734.pdf?refreqid=excelsior%3A367e6f93f8dc9bc1c81b311da5dbcd14.
---------- (2001). Acknowledging Misspecification in Macroeconomic Theory. Review of Economic Dynamics, 4, 519–535.
Levin, A. T., & Williams, J. C. (2003). Robust Monetary Policy with Competing Reference Models. Journal of Monetary Economics, 50, 945–975.
 
Medeiros, G. B. D., Portugal, M. S., & Aragón, E. K. D. B. (2016). Robust Monetary Policy, Structural Breaks, and Nonlinearities in the Reaction Function of the Central Bank of Brazil. Economy A, 17(1),96–113.
Onatski, A., & Stock, J. H. (2002). Robust Monetary Policy under Model Uncertainty in a Small Model of the US Economy. Macroeconomic Dynamics, 6, 85–110.
Onatski, A., & Williams, N. (2003). Modeling Model Uncertainty. Journal of the European Economic Association, 1, 1087–1122.
Rudebusch, G. (2001). Is the Fed Too Timid? Monetary Policy in an Uncertain World. The Review of Economics and Statistics, 83(2), 203-217.
Sack, B. (2000). Does the Fed Act Gradually? A VAR Analysis. Journal of Monetary Economics, 46, 229–256.
Shahmoradi, A., & Sarem, M. (2013), The Optimal Monetary Policy and Inflation Targeting in Iran. Journal of Economic Research, 48(2), 25–42.
Shuetrim, G., & Thompson, C. (1999). The Implications of Uncertainty for Monetary Policy. Economic Research Department Reserve Bank of Australia, Retrieved from
http://www.rba.gov.au/publications/rdp/1999/pdf/rdp1999-10.pdf.
Sims, C. A. (2001). Pitfalls of a Min-Max Approach to Model Uncertainty. Princeton University, Discussion Paper, Retrieved from http://pages.stern.nyu.edu/~dbackus/Exotic/1Robustness/Sims%20pitfalls%20AER%20May%2001.pdf.
Soderstrom, U. (2000). Monetary Policy with Uncertain Parameters. European Central Bank. Retrieved from
http://www.jstor.org/stable/pdf/3441145.pdf?refreqid=excelsior%3A3ab087d352f379de80ff4e89962b3470.
Tavakkolian, H. (2012). Examination of New Keynesian Philips Curve in the Form of a Random Dynamic Stochastic General Equilibrium Model for the Iranian Economy. Journal of Economic Research, 47(3), 1–22.
Theil, H. (1958). Economic Forecasts and Policy. Amsterdam: Mythos Center Books.
Tillman, P. (2009). Optimal Monetary Policy with Uncertain Cost Channel. Journal of Money, Credit and Banking, 41(5), 885–906.
Tinbergen, J. (1952). On the Theory of Economic Policy. Amsterdam: North Holland Publishing Company.
Traficante, G. (2013). Monetary Policy, Parameter Uncertainty and Welfare. Journal of Macroeconomics, 35, 73–80.
Yannacopoulos, A. N. (2013). Robust Control and Applications in Economic Theory. Retrieved from
http://users.uoa.gr/~istratis/imerida/talks/Yannacopoulos_talk.pdf.
Zarra Nezhad, M., & Anvari, E. (2012). Designing Optimum Monetary and Fiscal Policies of Iran under Uncertainty in Micro-Founded Macroeconomic Model. Journal of Monetary & Financial Economics, 19(3), 1–27.
 
Iranian Economic Review
Volume 22, Issue 2
Spring 2018
Pages 503-526

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