In Search of a New-Keynesian Hybrid Phillips Curve for the West African Economic and Monetary Union

International Journal of Economics and Management Studies
© 2021 by SSRG - IJEMS Journal
Volume 8 Issue 11
Year of Publication : 2021
Authors : Koffi Sodokin
How to Cite?

Koffi Sodokin, "In Search of a New-Keynesian Hybrid Phillips Curve for the West African Economic and Monetary Union," SSRG International Journal of Economics and Management Studies, vol. 8,  no. 11, pp. 22-30, 2021. Crossref,


The economic literature has been very sparse on the nature of the Phillips curve in the West African Economic and Monetary Union countries. This paper attempts to fill this gap and explores the dynamics of inflation in the sub-region over the period 1980-2018 using the hybrid form of the New Keynesian Phillips curve. I make some slight modifications to the specification proposed by Gali and Gertler (1999), due to the specificity of the small economies of the West African Economic and Monetary Union, to show, using the generalized method of moments, that the dynamics of inflation is not homogeneous in the zone. In practice, inflation is prospective for some groups of countries and retrospective for others. Thus, the output gap does not always perfectly reflect inflationary pressures in the zone. In fact, and contrary to theoretical predictions, the relationship between the output gap and the lagged inflation rate of k periods is not always positive.


Monetary Union, Hybrid Phillips Curve.


[1] Arellano M., Bond S., Some Tests of Specification for Panel Data: Monte Carlo Evidence and an Application to Employment Equations, Review of Economic Studies, 58 (1991) 277-297.
[2] Balakrishnan, J., & Lopez-Salido, J. D. Understanding UK inflation: The role of openness, 164 (2002).
[3] BCEAO, Report on consumer price trends in WAEMU in 2008 and outlook for 2009, Department of Economic Studies and Currency, 13 (2009).
[4] Benigno P., Inflation persistence and optimal monetary policy in the euro-area, Journal of Money, Credit and Banking 38 (2006) 587–614.
[5] Bilke LThe dynamics of inflation in France, Bulletin of the Banque de France, 141 (2005) 33-39.
[6] Bjørnstad, R., Nymoen, R., The new Keynesian Phillips curve tested on OECD panel data. Economics. The Open-Access, Open-Assessment E-Journal 2 (23) (2008) 1–18.
[7] Boug P., Cappelen A., Swensen A.R., The new Keynesian Phillips curve revisited, Journal of Economic Dynamics & Control. 34(5) (2010) 858-874.
[8] Bourbonnais R., et Terraza M., Analysis of time series in economics, PUF, 1st edition, Paris. (1998) 149-157.
[9] Dembo T., Houkpatin M., Link between money supply and inflation in WAEMU countries, Department of Economic Studies and Currency, Study and Research Document (D.E.R.) N°DER/O7/O2, (2007).
[10] Domac, I., Explaining and forecasting inflation in Turkey, World Bank Policy Research working paper ,3287 (2004) 1–41.
[11] Calvo, G.A., Staggered prices in a utility-maximizing framework, Journal of Monetary Economics. 12 (1983) 383–398.
[12] Fanelli, L., Testing the new Keynesian Phillips curve through vector autoregressive models: results from the Euro area, Oxford Bulletin of Economics and Statistics. 70 (2008) 53–66.
[13] Friedman, M., The role of monetary policy, American Economic Review. 58 (1968) 1–17.
[14] Gali, J., & Gertler, M. Inflation dynamics: A structural econometric analysis, Journal of Monetary Economics. 44 (1999) 195–222.
[15] Gali, J., Gertler, M., Lopez-Salido., European inflation dynamics, European Economic Review. 45 (2001) 1237–1270.
[16] Gali, J., Gertler, M., Lopez-Salido, J.D., Robustness of the estimates of the hybrid New Keynesian Phillips curve, Journal of Monetary Economics. 52 (2005) 1107–1118.
[17] Gordon, R. J., The theory of domestic inflation. American Economic Review. 67 (1977) 128–134.
[18] Juilliard, M., Kamenik, O., Kumhof, M., Laxton, D., Optimal price setting and inflation inertia in a rational expectation model, Journal of Economic Dynamics & Control. 32 (2008) 2584–2621.
[19] Mavroeidis, S. Testing the new Keynesian Phillips curve without assuming identification, Economics Working Paper Brown University, (2006). SSRN:/
[20] Muth J., Rational Expectations and the Theory of Price Movements, Econometrica. 29(3) (1961) 315-335.
[21] Phelps, E. S. Money-wage dynamics and labor market equilibrium, Journal of Political Economy. (1968) 678–711.
[22] Phillips, A. W., The relationship between unemployment and the rate of change of money wages in the United Kingdom, Economic, (1958) 283–299.
[23] Using the New Phillips curve, North American Journal of Economics and Finance. 19 (2008) 274–289.
[24] Roberts, J. M., New Keynesian economics and the Phillips curve. Journal of Money, Credit, and Banking, 27(4) (1995) 975–984.
[25] Rudd, J., & Whelan, K. Can rational expectations sticky-price models explain inflation dynamics? American Economic Review. 96 (2006).
[26] Sbordone, A. M. Prices and unit labor costs: A new test of price stickiness. Journal of Monetary Economics. 49 (2002) 265–292.
[27] Scheibe, J., Vines, D., A Phillips curve for China. Centre for applied macroeconomic analysis (CAMA), The Australian National University. 2 (2005) 1–40.
[28] Taylor, J.B., Aggregate dynamics, and staggered contracts, Journal of Political Economy. 88 (1980) 1–23.
[29] Touraya B. et Younes B., Long-term determinants and short-term dynamics of inflation in Tunisia, Applied Economics Research Unit (URECA). (2004).