Import Demand in Heterogeneous Panel Setting

Harb, Nasri (2005): Import Demand in Heterogeneous Panel Setting. Published in: Applied Economics , Vol. 37, No. 20 (2005): pp. 2407-2415.

Abstract

To study the elasticities of import demand function, we build a heterogeneous panel with data of 40 counties and use panel unit root tests (Im, Pesaran and Shin, 1997) and panel cointegration tests (Pedroni, forthcoming). We test our model with two previously used activity variables: GDP and GDP minus Export for a performance comparison. To estimate our elasticities, we make use of two modified panel version of FMOLS and DOLS developed by Pedroni (1996, 2000, 2001). Our tests prove that GDP outperforms GDP minus Exports as an activity variable in the cointegration context. FMOLS and DOLS give close results when we do individual estimates. When we use between-dimension estimators, we get conflicting results. Hence, we split our sample into developed and developing groups and show that income elasticity in developing countries are not different than unity on average and are higher than in developed countries contradicting previous results in the literature.

• Item Type: MPRA Paper
• Language: English
• Keywords: Import Demand elasticities, Time series, Panel cointegration, FMOLS, DOLS
• Subjects: F - International Economics > F1 - Trade > F10 - General; C - Mathematical and Quantitative Methods > C2 - Single Equation Models ; Single Variables > C23 - Panel Data Models ; Spatio-temporal Models; C - Mathematical and Quantitative Methods > C2 - Single Equation Models ; Single Variables > C22 - Time-Series Models ; Dynamic Quantile Regressions ; Dynamic Treatment Effect Models ; Diffusion Processes

References

Clarida, R. (1994) Cointegration, Aggregate Consumption, and the Demand for Imports: A Structural Econometric Investigation, The American Economic Review, vol. 84, No. 1, pp.298-308.

Dutta, D., and Ahmed, N. (2001) An Aggregate Import Demand Function for India: A Cointegration Analysis, Internal Working Paper, the University of Sydney.

Dutta, D., and Ahmed, N. (2001) An Aggregate Import Demand Function for India: A Cointegration Analysis, Internal Working Paper, the University of Sydney.

Goldstein, M. and Khan, M. (1985) Income and Price Effect in Foreign Trade, in R. Jones and P. Kenen, EDS, Handbook of International Economics, Amsterdam, North-Holland, 1042-1099.

Houthakker, H. S. and Magee, S. P. (1969): Income and Price Elasticities in World Trade, Review of Economics and Statistics, vol. 51, pp. 11-125.

Im, K., Pesaran, H. and Shin, Y. (1997): Testing for Unit Roots in Heterogeneous Panels, University of Cambridge, DAE Working Paper, No. 9526. Kao, C., and Chiang, M. (2000): On the Estimation and Inference of a Cointegrated Regression in Panel Data, Advances in Econometrics, vol. 15, pp. 179 -222.

Pedroni, P. (1999): Critical Values for Cointegration Tests in Heterogeneous Panels with Multiple Regressors, Oxford Bulletin of Economics and Statistics, vol. 61, No. 4, 653-670.

Pedroni, P. (1996): Fully Modified OLS for Heterogeneous Cointegrated Panels and The Case of Purchasing Power Parity, Indiana University Working Papers in Economics, No. 96-020.

Pedroni, P. (2000): Fully Modified OLS for Heterogeneous Cointegrated Panels, Advances in Econometrics, vol. 15, pp. 93-130.

Pedroni, P. (2001): Purchasing Power Parity Tests in Cointegrated Panels, The Review of Economics and Statistics, vol. 83, No. 4, pp. 727-731.

Pedroni, P. (Forthcoming): Panel Cointegration: Asymptotic and Finite Sample Properties of Pooled Time Series Tests with an Application to the PPP Hypothesis, Econometric Theory.

Philips, P. and Hansen, B. (1990) Statistical Inference in Instrumental Variables Regression with I(1) Processes, Review of Economic Studies, No. 57, pp. 99-125.

Phillips, P. and Loretan, M. (1991) Estimating Long-Run Economic Equilibria, Review of Economic Studies, vol. 58, No. 3, pp. 407-436.

Phillips, P. and Moon, H. (1999) Linear Regression Limit Theory for Nonstationary Panel Data, Econometrica, vol. 67, No. 5, pp. 1057-1111.

Reinhart, C. (1995) Devaluation, Relative Prices, and International Trade: Evidence from Developing Countries, IMF Staff Papers, vol. 42, No. 2.

Senhadji, A. (1997) Time-Series Estimation of Structural Import Demand Equations: A Cross-Country Analysis, IMF Working Paper, WP/97/132.

Stock, J. and Watson, M. (1988) Testing for Common Trends, Journal of the American Statistical Association, No. 83, pp. 1097-1107.

Stock, J. and Watson, M. (1990) A Simple MLE of Cointegrating Vectors in Higher Order Integrated Systems, NBER Technical Working Paper, No. 83.

Thursby, J. and Thursby, M. (1984) How Reliable Are Simple, Single Equation Specifications of Import Demand? The Review of Economics and Statistics, Vol. 66, No. 1, pp.120-128