Effect of the Shadow Economy on Tax Revenue in Sub-Saharan African Countries: A Dynamic Panel Data Analysis
DOI:
https://doi.org/10.17059/ekon.reg.2025-2-22Keywords:
shadow economy, tax revenue, unemployment, trade openness, GDP, Sub-Saharan Africa, GMM modelAbstract
The shadow economy in Sub-Saharan African (SSA) countries has become a persistent challenge that undermines government tax revenues. This study investigates the shadow economy’s adverse effect on tax revenue in SSA, addressing a critical gap in the region’s fiscal research. The analysis covers 15 SSA countries over the period of 15 years, using the Arellano-Bover/Blundell-Bond GMM estimation method. Model validity was confirmed through Arellano-Bond autocorrelation tests and a significant Wald chi-squared statistic, ensuring robust results. Descriptive analysis reveals that SSA countries exhibit relatively low tax revenue (15.7 % of GDP, on average) alongside a sizable shadow economy (36.2 % of GDP). The shadow economy was found to exert a significant negative effect on tax revenue (â = -0.249, p = 0.010). Tax revenues also display persistence, with prior tax revenue significantly influencing current levels. Among the control variables, unemployment (â = 0.315, p = 0.002) and trade openness (â = 0.057, p = 0.006) positively affect tax revenue. Conversely, foreign direct investment (â = – 0.022, p = 0.071) and oil revenue (â = -0.087, p = 0.002) have negative impacts, reflecting tax incentives and resource dependency. Control of corruption exerts a marginally positive influence (â = 2.950, p = 0.096). GDP per capita, inflation, the role of agriculture, the number of taxes paid by businesses, and regulatory quality show no significant effects. This study highlights the shadow economy’s detrimental impact on tax revenue in SSA and underscores the need for policies aimed at formalizing informal activities and strengthening tax compliance. The findings contribute to public finance research and provide practical guidance for designing sustainable fiscal policies. Avenues for future research could include expanding the analysis to a broader set of countries.
References
Achim, M. V., Mirza, N., & Văidean, V. L. (2023). The asymmetric impact of tax burden structures on the shadow economy: a panel analysis of old and new European Union countries. Applied Economics Letters, 30(16), 2179–2188. https://doi.org/10.1080/13504851.2022.2094876
Ahmad, W., & Hussain, B. (2024). Shadow Economy and Environmental Pollution Nexus in Developing Countries: What is the Role of Corruption? International Economic Journal, 38(2), 293–311. https://doi.org/10.1080/10168737.2024.2331463
Aizenman, J., Jinjarak, Y., Kim, J., & Park, D. (2019). Tax Revenue Trends in Latin America and Asia: A Comparative Analysis. Emerging Markets Finance and Trade, 55(2), 427–449. https://doi.org/10.1080/1540496X.2018.1527686
Ajide, F. M. (2021). Shadow economy in Africa: how relevant is financial inclusion? Journal of Financial Regulation and Compliance, 29(3), 297–316. https://doi.org/10.1108/JFRC-10-2020–0095
Alabede, J. O. (2018). Economic freedom and tax revenue performance in Sub-Saharan Africa. Journal of Financial Reporting and Accounting, 16(4), 610–638. https://doi.org/10.1108/JFRA-04-2017–0024
Ali, I., & Harvie, C. (2013). Oil and economic development: Libya in the post-Gaddafi era. Economic Modelling, 32(1), 273–285. https://doi.org/10.1016/j.econmod.2013.01.022
Barkoulas, D. R., & Chionis, D. (2024). Macroeconomic Dynamics in the Greek Economy during the Pre – and Post-Euro Adoption Periods. Journal of Risk and Financial Management, 17(4), 156. https://doi.org/10.3390/jrfm17040156
Baum, C. F., Schaffer, M. E., & Stillman, S. (2007). Enhanced routines for instrumental variables/generalized method of moment’s estimation and testing. The Stata Journal, 7(4), 465–506. https://doi.org/10.1177/1536867x0700700402
Bruhn, M., & Loeprick, J. (2016). Small business tax policy and informality: evidence from Georgia. International Tax and Public Finance, 23(5), 834–853. https://doi.org/10.1007/s10797-015-9385-9
Chamisa, M. G., & Sunde, T. (2024). Key determinants of tax revenue in Zimbabwe: assessment using autoregressive distributed lag (ARDL) approach. Cogent Economics and Finance, 12(1). https://doi.org/10.1080/23322039.2024.2386130
Danquah, M., Schotte, S., & Sen, K. (2021). Informal work in Sub-Saharan Africa: Dead end or stepping-stone? IZA Journal of Development and Migration, 12(1). https://doi.org/10.2478/izajodm-2021–0015
Dell’Anno, R., Davidescu, A. A., & Balele, N. P. (2018). Estimating shadow economy in Tanzania: an analysis with the MIMIC approach. Journal of Economic Studies, 45 (1), 100–113. https://doi.org/10.1108/JES-11-2016–0240
Dokas, I., Panagiotidis, M., Papadamou, S., & Spyromitros, E. (2024). The impact of the shadow economy on the direct-indirect tax mix: Can central banks’ independence mitigate the effect? Journal of Policy Modeling, 46 (3), 475–493. https://doi.org/10.1016/j.jpolmod.2024.03.001
Dutta, M. (2020). Does Informality Hold the Key to Growth and Stability? Applied Economics Quarterly, 66(1), 29–45. https://doi.org/10.3790/aeq.66.1.29
Dybka, P., Kowalczuk, M., Olesiński, B., Torój, A., & Rozkrut, M. (2019). Currency demand and MIMIC models: towards a structured hybrid method of measuring the shadow economy. International Tax and Public Finance, 26(1), 4–40. https://doi.org/10.1007/s10797-018-9504-5
Ebeke, C., & Ehrhart, H. (2012). Tax revenue instability in Sub-Saharan Africa: Consequences and remedies. Journal of African Economies, 21(1), 1–27. https://doi.org/10.1093/jae/ejr026
Fedajev, A., Velickovic, M., Nikolic, R., Cogoljevic, M., & Remeikiene, R. (2022). Factors of the Shadow Economy in Market and Transition Economies during the Post-Crisis Period: is there a Difference? Engineering Economics, 33(3), 246–263. https://doi.org/10.5755/j01.ee.33.3.28417
Fukuda, K. (2019). Model selections approach for multiple indicators multiple cause’s model. Applied Economics, 5 (19), 2084–2090. https://doi.org/10.1080/00036846.2018.1540847
Gaspareniene, L., Kliestik, T., Sivickiene, R., Remeikiene, R., & Endrijaitis, M. (2022). Impact of Foreign Direct Investment on Tax Revenue: The Case of the European Union. Journal of Competitiveness, 14(1), 43–60. https://doi.org/10.7441/joc.2022.01.03
Geraci A, Fabbri D, Monfardini C. (2018). Testing Exogeneity of Multinomial Regressors in Count Data Models: Does Two-stage Residual Inclusion Work? Journal of Econometric Methods, 7(1). https://doi.org/10.1515/jem-2014–0019
Gnangnon, S. K., & Brun, J.-F. (2019). Trade openness, tax reform and tax revenue in developing countries. The World Economy, 42(12), 3515–3536. https://doi.org/10.1111/twec.12858
Irandoust, M. (2024). Informality and Taxation: Evidence from Seven Latin American Countries. Revista Hacienda Publica Espanola, 248(1), 91–114. https://doi.org/10.7866/HPE-RPE.24.1.5
Ishak, P. W., & Farzanegan, M. R. (2020). The impact of declining oil rents on tax revenues: Does the shadow economy matter? Energy Economics, 92, 104925. https://doi.org/10.1016/j.eneco.2020.104925
Kassim, O. (2024). The tax revenue implication of trade liberalization in sub-Saharan Africa: Some new evidence. Review of Development Economics, 28(4), 1522–1550. https://doi.org/10.1111/rode.13106
Kebede, T. N., Erena, O. T., & Bawiso, E. P. (2024). Determinants of Tax Revenue: A Cointegration and Causality Analysis for Ethiopia, 1992–2022. Journal of Tax Reform, 10(3), 493–509. https://doi.org/10.15826/jtr.2024.10.3.180
Kireenko, A. P., & Nevzorova, E. N. (2019). Shadow Economy in the Countryside of Russian Regions. Regional Research of Russia, 9(1), 66–77. https://doi.org/10.1134/S2079970519010052
Kubaje, T. A., Amoasi-Andoh, R., Eklemet, I., & Wassan, S. N. (2025). Foreign direct investments, tax revenue, and economic growth in Sub-Saharan Africa: does maximum tax apply? Cogent Economics & Finance, 13(1). https://doi.org/10.1080/23322039.2024.2446651
Lavic, V. (2023). Factors affecting corporate income tax compliance costs of SMEs in Bosnia and Herzegovina. Journal of Entrepreneurship and Public Policy, 12(1), 92–114. https://doi.org/10.1108/JEPP-02-2022–0023
Le, T. V., & Elliott, K. (2023). The effects of income tax on the unemployment rate in the United States. Economic Horizons, 25(2), 121–133. https://doi.org/10.5937/ekonhor2302135L
Lozano-Espitia, I., & Arias-Rodríguez, F. (2021). How do the tax burden and the fiscal space in Latin America look like? Evidence through laffer curves. Latin American Economic Review, 30, 1–26. https://doi.org/10.47872/laer.v30.77
Maji, I. K., Saari, M. Y., Habibullah, M. S., & Utit, C. (2017). Measuring the economic impacts of recent oil price shocks on oil-dependent economy: evidence from Malaysia. Policy Studies, 38(4), 375–391. https://doi.org/10.1080/01442872.2017.1320706
Makun, K., & Singh, B. (2025). Trade deregulation and fiscal revenue in selected Pacific Island countries. PLoS ONE, 20(1), e0315733. https://doi.org/10.1371/journal.pone.0315733
Marjanović, D., & Domazet, I. (2021). Tax competitiveness as a significant factor in attracting foreign investment — the case of Serbia. Argumenta Oeconomica, 47(2), 63–80. https://doi.org/10.15611/aoe.2021.2.04
Mazhar, U., & Méon, P.-G. (2017). Taxing the unobservable: The impact of the shadow economy on inflation and taxation. World Development, 90, 89–103. https://doi.org/10.1016/j.worlddev.2016.08.019
Melina, G., & Portillo, R. (2018). Economic fluctuations in Sub-Saharan Africa. In A. Berg, R. Portillo (Eds.), Monetary Policy in Sub-Saharan Africa (pp. 61–88). https://doi.org/10.1093/oso/9780198785811.003.0004
Menescal, L., & Alves, J. (2024). Optimal threshold taxation: An empirical investigation for developing economies. The Journal of Economic Asymmetries, 29, e00343. https://doi.org/10.1016/j.jeca.2023.e00343
Meniago, C., & Lartey, E. K. K. (2021). Does FDI Affect Productivity and Growth in Sub-Saharan Africa? Journal of African Business, 22(2), 274–292. https://doi.org/10.1080/15228916.2020.1745011
Mihaljek, D. (2023). Inflation and public finances: an overview. Public Sector Economics, 47(4), 413–430. https://doi.org/10.3326/pse.47.4.2
Nguimkeu, P., & Okou, C. (2022). Does informality increase the spread of COVID-19 in Africa? A cross-country examination. Applied Economics Letters, 29(12), 1111–1115. https://doi.org/10.1080/13504851.2021.1910128
Nguyen, V. D., & Duong, T. H. M. (2022). Corruption, Shadow Economy, FDI, and Tax Revenue in BRICS: A Bayesian approach. Montenegrin Journal of Economics, 18(2), 85–94. https://doi.org/10.14254/1800–5845/2022.18-2.8
Oanh, T. T. K., Quoc, H. V., Nha, L. T., Chau, N. T. B., & Phat, N. H. (2024). The Relationship between the Shadow Economy, Corruption, and Taxes: Empirical Evidence from Countries with High and Low Financial Development. Studia Universitatis “Vasile Goldis” Arad — Economics Series, 34(4), 78–104. https://doi.org/10.2478/sues-2024–0019
Omodero, C. O. (2019). The Consequences of Shadow Economy and Corruption on Tax Revenue Performance in Nigeria. Studia Universitatis “Vasile Goldis Arad” — Economics Series, 29(3), 64–79. https://doi.org/10.2478/sues-2019–0012
Omodero, C. O., & Yado, J. L. (2024). Effects of Foreign Direct Investment and Trade Openness on Tax Earnings: A Study of Selected Sub-Saharan African Economies. Economies, 12(12), 342. https://doi.org/10.3390/economies12120342
Pérez-Oviedo, W., Cajas-Guijarro, J., & Pinzón-Venegas, K. (2024). Corruption, unemployment, and clientelism: A Political Economy approach. Economic Modelling, 135, 106723. https://doi.org/10.1016/j.econmod.2024.106723
Rahman, M. M., & Islam, M. E. (2023). Does Trade Openness Affect Taxation? Evidence from BRICS Countries. Millennial Asia. https://doi.org/10.1177/09763996231199310
Rohman, I. K., & Veiga, L. (2017). Against the shadow: The role of e-Government. Proceedings of the 18th Annual International Conference on Digital Government Research, 319–328. https://doi.org/10.1145/3085228.3085321
Roodman, D. (2009). How to do Xtabond2: An introduction to difference and system GMM in Stata. The Stata Journal, 9(1), 86–136. https://doi.org/10.1177/1536867x0900900106
Sartov, U., Brodunov, A., Bushueva, N., Nurgazina, G., & Abdusattarova, S. (2023). Tax Administration in Transport Sphere in the Digitalization Process. In A. Beskopylny, M. Shamtsyan, V. Artiukh (Eds.), XV International Scientific Conference “INTERAGROMASH 2022”. INTERAGROMASH 2022. Lecture Notes in Networks and Systems, Vol. 574. (pp. 1925–1934). Springer International Publishing. https://doi.org/10.1007/978-3-031-21432-5_210
Schneider, F., Buehn, A., & Montenegro, C. E. (2010). New estimates for the shadow economies all over the world. International Economic Journal, 24(4), 443–461. https://doi.org/10.1080/10168737.2010.525974
Šehović, D., Konatar, M., Smolović, J. C., & Đurašković, J. (2021). Socioeconomic determinants of local fiscal success — The case of Montenegrin municipalities. Lex Localis, 19(3), 689–703. https://doi.org/10.4335/19.3.689-703(2021)
Shehabi, M. (2020). Diversification effects of energy subsidy reform in oil exporters: Illustrations from Kuwait. Energy Policy, 138, 110966. https://doi.org/10.1016/j.enpol.2019.110966
Silajdzic, S., & Mehic, E. (2022). How effective is tax policy in attracting foreign direct investments in transition countries? Central European Business Review, 11(1), 19–39. https://doi.org/10.18267/j.cebr.274
Sitkiewicz, M., & Białek-Jaworska, A. (2024). Profit shifting to tax havens: Withholding tax impact on passive flows from Poland. Transnational Corporations Review, 16(2), 200059. https://doi.org/10.1016/j.tncr.2024.200059
Wang, Y., Antohi, V. M., Fortea, C., Zlati, M. L., Mohammad, R. A., Abdelkhair, F. Y. F., & Ahmad, W. (2024). Shadow Economy and Environmental Sustainability in Global Developing Countries: Do Governance Indicators Play a Role? Sustainability, 16(22), 9852. https://doi.org/10.3390/su16229852
Wilkins, A. S. (2018). To lag or not to lag? Re-evaluating the use of lagged dependent variables in regression analysis. Political Science Research and Methods, 6(2), 393–411. https://doi.org/10.1017/psrm.2017.4
Ya’u, A., Umar, M. A., Yunusa, N., & Rengasamy, D. (2024). Effects of some macroeconomics variables on estimated tax evasion: evidence from Sub-Saharan Africa. African Journal of Economic and Management Studies, 15(4), 587–601. https://doi.org/10.1108/AJEMS-06-2023–0233
Yamen, A., Allam, A., Bani-Mustafa, A., & Uyar, A. (2018). Impact of institutional environment quality on tax evasion: A comparative investigation of old versus new EU members. Journal of International Accounting, Auditing and Taxation, 32, 17–29. https://doi.org/10.1016/j.intaccaudtax.2018.07.001
Zimmermannova, J., Skalickova, J., & Siroky, J. (2016). What can tax revenues tell us about the economic activity of regions? Economics & Sociology, 9(1), 114–128. https://doi.org/10.14254/2071-789X.2016/9-1/8
Zirgulis, A., & Šarapovas, T. (2017). Impact of corporate taxation on unemployment. Journal of Business Economics and Management, 18(3), 412–426. https://doi.org/10.3846/16111699.2016.1278400
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