Causal relationships among fiscal deficit, saving-investment gap, and external imbalances in Jordan: Evidence from the Toda–Yamamoto approach
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DOIhttp://dx.doi.org/10.21511/pmf.15(4).2026.01
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Article InfoVolume 15 2026, Issue #4, pp. 1-13
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Type of the article: Research Article
Abstract
This study aims to identify the direction of Granger predictability between fiscal deficit, saving-investment gap, and external account imbalances in Jordan over the period 1976–2024. It seeks to better understand the interaction between internal macroeconomic imbalances and external sector disequilibria and their implications for long-term economic stability. To achieve this objective, the study first applied the Augmented Dickey–Fuller (ADF) unit root test, which revealed that the variables were not integrated of the same order. This finding limited the applicability of the traditional Granger causality approach. Accordingly, the study employed the Toda–Yamamoto Modified Wald (MWald) causality test, which does not require all variables to be integrated of the same order.
The empirical findings indicate significant predictive linkages between internal and external macroeconomic imbalances in Jordan. Specifically, the fiscal deficit Granger-predicts the current account, while the saving–investment gap Granger-predicts external debt. In addition, the current account, external debt, and foreign exchange reserves jointly Granger-predict the saving–investment gap, highlighting the interconnectedness between domestic and external macroeconomic conditions. The findings suggest that the relationship between internal and external imbalances in Jordan is more complex than implied by the conventional twin-deficit hypothesis and underscore the importance of the saving–investment gap as an important link between domestic and external macroeconomic conditions. Accordingly, the findings highlight the importance of coordinated macroeconomic policies for strengthening fiscal discipline, promoting domestic saving, and improving investment.
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JEL Classification (Paper profile tab)E62, H62, E21, F32
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References48
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Tables5
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Figures0
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- Table 1. ADF unit root test
- Table 2. Optimal lag length selection
- Table 3. Lag exclusion Wald test results for the augmented VAR(4) model
- Table 4. Diagnostic tests for the augmented VAR (4) model
- Table 5. Toda–Yamamoto individual and joint causality test results
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- Abell, J. D. (1990). Twin deficits during the 1980s: An empirical investigation. Journal of Macroeconomics, 12(1), 81-96.
- Alfaro, L., Kalemli-Ozcan, S., & Volosovych, V. (2008). Why doesn’t capital flow from rich to poor countries? An empirical investigation. Review of Economics and Statistics, 90(2), 347-368.
- Baharumshah, A. Z., Lau, E., & Khalid, A. M. (2006). Testing twin deficits hypothesis using VARs and variance decomposition. Journal of the Asia Pacific Economy, 11(3), 331-354.
- Bahmani-Oskooee, M. (1992). What are the long-run determinants of the US trade balance? Journal of Post Keynesian Economics, 15(1), 85-97.
- Bahmani-Oskooee, M. (1995). The long-run determinants of the U.S. trade balance revisited. Journal of Post Keynesian Economics, 17(3), 457-465.
- Barro, R. J. (1989). The Ricardian approach to budget deficits. Journal of Economic Perspectives, 3(2), 37-54.
- Bernheim, B. D. (1989). A neoclassical perspective on budget deficits. Journal of Economic Perspectives, 3(2), 55-72.
- Blanchard, O. (2021). Macroeconomics (8th ed.). Pearson Education.
- Bluedorn, J., & Leigh, D. (2011). Revisiting the twin deficits hypothesis: The effect of fiscal consolidation on the current account. IMF Economic Review, 59(4), 582-602.
- Caballero, R. J., Farhi, E., & Gourinchas, P. O. (2008). An equilibrium model of global imbalances and low interest rates. American Economic Review, 98(1), 358-393.
- Cavallo, M. (2007). Government consumption expenditures and the current account. Public Finance and Management, 7(1), 73-115.
- Chinn, M., & Prasad, E. (2003). Medium-term determinants of current accounts in industrial and developing countries. Journal of International Economics, 59(1), 47-76.
- Darrat, A. F. (1988). Have Large Budget Deficits Caused Rising Trade Deficits? Southern Economic Journal, 54(4), 879-887.
- Dewald, W. G., & Ulan, M. (1990). The twin-deficit illusion. Cato Journal, 9(3), 689-707.
- Dolado, J. J., & Lütkepohl, H. (1996). Making Wald tests work for cointegrated VAR systems. Econometric Reviews, 15(4), 369-386.
- Dornbusch, R., Fischer, S., & Startz, R. (2014). Macroeconomics (12th ed.). McGraw-Hill Education.
- Enders, W. (2008). Applied econometric time series (3rd ed.). John Wiley & Sons.
- Enders, W., & Lee, B. (1990). Current account and budget deficits: Twins or distant cousins? Review of Economics and Statistics, 72(3), 373-381.
- Engle, R. F., & Granger, C. W. J. (1987). Co-integration and error correction: Representation, estimation, and testing. Econometrica, 55(2), 251-276.
- Epaphra, M. (2017). The twin deficits hypothesis: An empirical analysis for Tanzania. Romanian Economic Journal, 20(65), 2-34.
- Erceg, C. J., Guerrieri, L., & Gust, C. (2005). Expansionary fiscal shocks and the US trade deficit. International Finance, 8(3), 363-397.
- Feldstein, M., & Horioka, C. (1980). Domestic saving and international capital flows. Economic Journal, 90(358), 314-329.
- Forte, F., & Magazzino, C. (2015). Ricardian equivalence and twin deficits hypotheses in the euro area. Journal of Social and Economic Development, 17(2), 148-166.
- Freund, C. (2005). Current account adjustment in industrial countries. Journal of International Money and Finance, 24(8), 1278-1298.
- Froyen, R. T. (1999). Macroeconomics: Theories and policies (5th ed.). Prentice Hall.
- Ghazo, A. (2026). Causal relationships among fiscal deficit, saving–investment gap, and external [Data set]. Zenodo.
- Granger, C. W. J. (1986). Developments in the study of cointegrated economic variables. Oxford Bulletin of Economics and Statistics, 48(3), 213-228.
- Hatemi-J, A., & Shukur, G. (2002). Multivariate-based causality tests of twin deficits in the US. Journal of Applied Statistics, 29(6), 817-824.
- Higgins, M. (1998). Demography, national savings, and international capital flows. International Economic Review, 39(2), 343-369.
- Ibrahim, S. B., & Kumah, F. Y. (1996). Comovements in budget deficits, money, interest rates, exchange rates and the current account balance: Some empirical evidence. Applied Economics, 28(1), 117-130.
- International Monetary Fund (IMF). (2009). Balance of payments and international investment position manual (6th ed.). Washington, DC.
- International Monetary Fund (IMF). (2014). Government finance statistics manual. Washington, DC.
- International Monetary Fund (IMF). (2023). Jordan: Sixth Review Under the Extended Arrangement under the Extended Fund Facility and Request for Modification of Performance Criteria – Press Release; and Staff Report. IMF Country Report.
- Islam, M. F. (1998). Brazil’s twin deficits: An empirical examination. Atlantic Economic Journal, 26(2), 121-128.
- Johansen, S., & Juselius, K. (1990). Maximum likelihood estimation and inference on cointegration. Oxford Bulletin of Economics and Statistics, 52(2), 169-210.
- Khalid, A. M. (1996). Ricardian equivalence: Empirical evidence from developing economies. Journal of Development Economics, 51(2), 413-432.
- Kumhof, M., & Laxton, D. (2013). Fiscal deficits and current account deficits. Journal of Economic Dynamics and Control, 37(10), 2062-2082.
- Leachman, L. L., & Francis, B. (2002). Twin deficits: Apparition or reality? Applied Economics, 34(9), 1121-1132.
- Miller, S. M., & Russek, F. S. (1989). Are the twin deficits really related? Contemporary Economic Policy, 7(4), 91-115.
- Mukhtar, T., Zakaria, M., & Ahmed, M. (2007). An empirical investigation for the twin deficit hypothesis in Pakistan. Journal of Economic Cooperation, 28(4), 63-80.
- Obstfeld, M., & Rogoff, K. (1995). The intertemporal approach to the current account. In G. Grossman & K. Rogoff (Eds.), Handbook of International Economics (Vol. 3, pp. 1731-1799). Elsevier.
- Obstfeld, M., & Rogoff, K. (2005). Global current account imbalances and exchange rate adjustments. Brookings Papers on Economic Activity, 2005(1), 67-146.
- Reisen, H. (1998). Sustainable and excessive current account deficits. Empirica, 25(2), 111-131.
- Summers, L. H. (1988). Tax policy and international competitiveness. In J. A. Frenkel (Ed.), International Aspects of Fiscal Policies (pp. 349-386). University of Chicago Press.
- Toda, H. Y., & Yamamoto, T. (1995). Statistical inference in vector autoregressions with possibly integrated processes. Journal of Econometrics, 66(1-2), 225-250.
- Vamvoukas, G. (1999). The twin deficits phenomenon: Evidence from Greece. Applied Economics, 31(9), 1093-1100.
- World Bank. (2023). International debt report 2023. World Bank.
- Zietz, J., & Pemberton, D. K. (1990). The US budget and trade deficits: A simultaneous equation model. Southern Economic Journal, 57(1), 23-34.


