The Moderating Role of Urbanisation in the Environmental Impact of Economic Complexity and Capital Formation: Evidence from OECD Countries

Kemal Erkisi

doi:10.23762/FSO_VOL13_NO3_3

Published : 2025-09-30

Vol. 13 No. 3 (2025)

The Moderating Role of Urbanisation in the Environmental Impact of Economic Complexity and Capital Formation: Evidence from OECD Countries

Kemal Erkisi

https://orcid.org/0000-0001-7197-8768

DOI: https://doi.org/10.23762/FSO_VOL13_NO3_3

Abstract

Environmental degradation remains a pressing challenge for high-income countries as they strive to balance economic growth with ecological sustainability. While previous studies have examined various drivers of environmental outcomes, the interplay between economic complexity, capital formation, and energy use has received limited attention. This study investigates how these factors influenced ecosystem vitality in high-income countries over the period of 2000–2022. Drawing on Ecological Modernisation Theory and the Environmental Kuznets Curve framework, this study employs four panel data estimation methods, Panel-Corrected Standard Errors, Driscoll–Kraay Estimators, Poisson Pseudo-Maximum Likelihood, and Feasible Generalised Least Squares, to address cross-sectional dependence, heteroskedasticity, and potential non-linearities. The analysis reveals three key findings. First, while economic complexity improves ecosystem vitality, this benefit weakens substantially in highly urbanised contexts, indicating diminishing returns to knowledge spillovers in dense urban environments. Second, urbanisation significantly reduces the negative environmental impacts of capital accumulation, suggesting that urban agglomeration enables more sustainable infrastructure deployment. Third, the urbanisation–environment relationship follows an inverted U-shape, with environmental pressures peaking at intermediate development stages before improving in advanced urban systems. Additionally, renewable energy adoption consistently improves ecosystem vitality, whereas energy intensity exerts negative effects, highlighting the urgency of comprehensive energy transition strategies. These findings demonstrate that urbanisation acts not as a uniform force, but as a dynamic variable requiring spatially differentiated strategies: governance and infrastructure optimisation in dense urban cores, complexity-driven innovation in peri-urban regions, and energy-intensity regulations across all development stages. These findings point to an integrated policy framework that addresses (1) density-sensitive economic complexity, (2) circular infrastructure investment, (3) institutional capacity building, and (4) multi-scalar energy transitions to better align urban development with environmental sustainability.

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urbanisation, economic complexity, ecosystem vitality, energy intensity, renewable energy.

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Erkisi, K. (2025). The Moderating Role of Urbanisation in the Environmental Impact of Economic Complexity and Capital Formation: Evidence from OECD Countries. Forum Scientiae Oeconomia, 13(3), 68–88. https://doi.org/10.23762/FSO_VOL13_NO3_3

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References

Adebayo, T. S., & Kirikkaleli, D. (2022). Capital formation, green innovation, renewable energy consumption, and CO₂ emissions in G7 countries: A quantile regression approach. Environmental Science and Pollution Research, 29, 12345–12360. https://doi.org/10.1007/s11356-021-16913-6.

Aluko, O., Opoku, E., & Acheampong, A. (2023). Economic complexity and environmental degradation: Evidence from OECD countries. Business Strategy and the Environment, 32(6), 2767–2788. https://doi.org/10.1002/bse.3269.

Balland, P., Jara-Figueroa, C., Petralia, S., Steijn, M., Rigby, D., & Hidalgo, C. (2020). Complex economic activities concentrate in large cities. Nature Human Behaviour, 4, 248–254. https://doi.org/10.1038/s41562-019-0803-3.

Balsalobre-Lorente, D., Shahbaz, M., Murshed, M., & Nuță, F. (2023). Environmental impact of globalization: The case of central and Eastern European emerging economies. Journal of Environmental Management, 341, Article 118018. https://doi.org/10.1016/j.jenvman.2023.118018.

Bashir, M. F., Ma, B., Hussain, H. I., Shahbaz, M., Koca, K., & Shahzadi, I. (2022). Evaluating environmental commitments to COP21 and the role of economic complexity, renewable energy, financial development, urbanization, and energy innovation: Empirical evidence from the RCEP countries. Renewable Energy, 184, 541–550. https://doi.org/10.1016/j.renene.2021.11.102.

Beck, N., & Katz, J. N. (1995). What to do (and not to do) with time-series cross-section data. American Political Science Review, 89(3), 634–647. https://doi.org/10.2307/2082979.

Boleti, E., Garas, A., Kyriakou, A., & Lapatinas, A. (2021). Economic complexity and environmental performance: Evidence from a world sample. Environmental Modeling & Assessment, 26, 251–270. https://doi.org/10.1007/s10666-021-09750-0.

Burger, J. R., Brown, J. H., Day, J. W., Flanagan, T. P., & Roy, E. D. (2019). The central role of energy in the urban transition: Global challenges for sustainability. Biophysical Economics and Resource Quality, 4(1), Article 5. https://doi.org/10.1007/s41247-019-0053-z.

Cao, N., Ling, S., & Cui, X. (2025). Measurement and comparative analysis of Chinese new-type urbanization and eco-environment system coordination. Sustainability, 17(5), Article 1824. https://doi.org/10.3390/su17051824.

Chang, G., Yasin, I., & Naqvi, S. M. M. A. (2024). Environmental sustainability in OECD nations: The moderating impact of green innovation on urbanization and green growth. Sustainability, 16(16), Article 7047. https://doi.org/10.3390/su16167047.

Cheng, Y., Chen, X., Sun, H., & Zhu, H. (2023). Spatio-temporal heterogeneity and driving mechanisms of urbanization impact on ecosystem service values in the Yellow River Basin, China. Land, 12(7), Article 1301. https://doi.org/10.3390/land12071301.

Churkina, G. (2016). The role of urbanization in the global carbon cycle. Frontiers in Ecology and Evolution, 3, Article 144. https://doi.org/10.3389/fevo.2015.00144.

Correia, S., Guimarães, P., & Zylkin, T. (2020). Fast Poisson estimation with high-dimensional fixed effects. The Stata Journal, 20(1), 95–115. https://doi.org/10.1177/1536867X20909691.

Das, R. C., Chatterjee, T., & Ivaldi, E. (2021). Sustainability of urbanization, non-agricultural output and air pollution in the world’s top 20 polluting countries. Data, 6(6), Article 65. https://doi.org/10.3390/data6060065.

Degirmenci, T., Sofuoglu, E., & Aydin, M. (2024). The role of energy intensity, green energy transition, and environmental policy stringency on environmental sustainability in G7 countries. Clean Technologies and Environmental Policy, 26(8), 1–13. https://doi.org/10.1007/s10098-024-02968-y.

Di Clemente, R., Strano, E., & Batty, M. (2021). Urbanization and economic complexity. Scientific Reports, 11, Article 6667. https://doi.org/10.1038/s41598-021-83238-5.

Doğan, B., Saboori, B., & Can, M. (2019). Does economic complexity matter for environmental degradation? An empirical analysis for different stages of development. Environmental Science and Pollution Research, 26, 31900–31912. https://doi.org/10.1007/s11356-019-06333-1.

Driscoll, J. C., & Kraay, A. C. (1998). Consistent covariance matrix estimation with spatially dependent panel data. The Review of Economics and Statistics, 80(4), 549–550. https://doi.org/10.1162/003465398557825.

Duranton, G., & Puga, D. (2004). Micro-foundations of urban agglomeration economies. In J. V. Henderson & J.-F. Thisse (Eds.), Handbook of regional and urban economics: Cities and geography (Vol. 4, pp. 2063–2117). Elsevier. https://doi.org/10.1016/S1574-0080(04)80005-1

Franco, S., Mandla, V. R., & Rao, K. R. M. (2017). Urbanization, energy consumption and emissions in the Indian context: A review. Renewable and Sustainable Energy Reviews, 74, 836–846. https://doi.org/10.1016/j.rser.2016.12.117.

Fritz, B., & Manduca, R. (2021). The economic complexity of US metropolitan areas. Regional Studies, 55(8), 1299–1310. https://doi.org/10.1080/00343404.2021.1884215.

Gomez-Lievano, A., & Patterson-Lomba, O. (2021). Estimating the drivers of urban economic complexity and their connection to economic performance. Royal Society Open Science, 8, 210670. https://doi.org/10.1098/rsos.210670.

Greene, W. H. (2003). Econometric analysis (5th ed.). Prentice Hall.

Harvard Growth Lab. (2024). The Atlas of Economic Complexity. https://atlas.hks.harvard.edu/rankings.

Hassan, S., Wang, P., Khan, I., & Zhu, B. (2023). The impact of economic complexity, technology advancements, and nuclear energy consumption on the ecological footprint of the USA: Towards circular economy initiatives. Gondwana Research, 113, 237–246. https://doi.org/10.1016/j.gr.2022.11.001.

Hidalgo, C. A., & Hausmann, R. (2009). The building blocks of economic complexity. Proceedings of the National Academy of Sciences, 106(26), 10570–10575. https://doi.org/10.1073/pnas.0900943106.

International Energy Agency. (2024). Statistical Review of World Energy – SDG7 Database. https://www.iea.org/data-and-statistics/data-product/sdg7-database.

Juodis, A., & Reese, S. (2022). The incidental parameters problem in testing for remaining cross-section correlation. Journal of Business & Economic Statistics, 40(3), 1191–1203. https://doi.org/10.1080/07350015.2021.1906687.

Khezri, M., Heshmati, A., & Khodaei, M. (2022). Environmental implications of economic complexity and its role in determining how renewable energies affect CO₂ emissions. Applied Energy, 306, Article 117948. https://doi.org/10.1016/j.apenergy.2021.117948.

Kusiyah, K., Mushtaq, M., Ahmed, S., Abbas, A., & Fahlevi, M. (2024). Impact of urbanization on environmental eminence: Moderating role of renewable energy. International Journal of Energy Economics and Policy, 14(2), 244–257. https://doi.org/10.32479/ijeep.14232.

Kwilinski, A., Lyulyov, O., & Pimonenko, T. (2023). The effects of urbanisation on green growth within sustainable development goals. Land, 12(2), Article 511. https://doi.org/10.3390/land12020511.

Lapatinas, A., Litina, A., & Poulios, K. (2022). Economic complexity of cities and its role for resilience. PLOS ONE, 17(7), Article e0269797. https://doi.org/10.1371/journal.pone.0269797.

Latief, R., Sattar, U., Javeed, S. A., Gull, A. A., & Pei, Y. (2022). The environmental effects of urbanization, education, and green innovation in the Union for Mediterranean countries: Evidence from quantile regression model. Energies, 15(15), Article 5456. https://doi.org/10.3390/en15155456.

Liang, Y., Ur Rahman, S., Shafaqat, A., Ali, A., Ali, M. S. E., & Khan, H. (2024). Assessing sustainable development in E-7 countries: Technology innovation, and energy consumption drivers of green growth and environment. Scientific Reports, 14, Article 79908. https://doi.org/10.1038/s41598-024-79908-9.

Liu, S., Yang, M., Mou, Y., Meng, Y., Zhou, X., & Peng, C. (2020). Effect of urbanization on ecosystem service values in the Beijing-Tianjin-Hebei urban agglomeration of China from 2000 to 2014. Sustainability, 12(24), Article 10233. https://doi.org/10.3390/su122410233.

Mankiw, N. G., Romer, D., & Weil, D. N. (1992). A contribution to the empirics of economic growth. The Quarterly Journal of Economics, 107(2), 407–437. https://doi.org/10.2307/2118477.

McGranahan, G., Balk, D., & Anderson, B. (2007). The rising tide: assessing the risks of climate change and human settlements in low elevation coastal zones. Environment and Urbanization, 19(1), 17–37. https://doi.org/10.1177/0956247807076960.

Mealy, P., & Teytelboym, A. (2022). Economic complexity and the green economy. Research Policy, 51(8), 103948. https://doi.org/10.1016/j.respol.2020.103948.

Mol, A. P. J., & Spaargaren, G. (2000). Ecological modernization theory in debate: A review. Environmental Politics, 9(1), 17–49. https://doi.org/10.1080/09644010008414511.

OECD. (2023). Sustainable urban development. OECD Publishing. Retrieved from https://www.oecd.org/en/topics/sustainable-urban-development.html.

Onifade, S. T., & Alola, A. A. (2023). Environmental quality outlook of the leading oil producers and urbanized African states. Environmental Science and Pollution Research, 30(45), 67523–67538. https://doi.org/10.1007/s11356-023-28915-w.

Parks, R. W. (1967). Efficient estimation of a system of regression equations when disturbances are both serially and contemporaneously correlated. Journal of the American Statistical Association, 62(318), 500–509. https://doi.org/10.2307/2283977.

Pata, U. (2021). Renewable and non-renewable energy consumption, economic complexity, CO₂ emissions, and ecological footprint in the USA: Testing the EKC hypothesis with a structural break. Environmental Science and Pollution Research, 28, 846–861. https://doi.org/10.1007/s11356-020-10446-3.

Pesaran, M. H. (2004). General diagnostic tests for cross section dependence in panels. Cambridge Working Papers. Economics, 1240(1), Article 1. https://doi.org/10.2139/ssrn.572504.

Pesaran, M. H. (2007). A simple panel unit root test in the presence of cross-section dependence. Journal of Applied Econometrics, 22(2), 265–312. https://doi.org/10.1002/jae.951.

Pesaran, M. H. (2015). Testing weak cross-sectional dependence in large panels. Econometric Reviews, 34(6–10), 1089–1117. https://doi.org/10.1080/07474938.2014.956623.

Pesaran, M. H., & Yamagata, T. (2008). Testing slope homogeneity in large panels. Journal of Econometrics, 142(1), 50–93. https://doi.org/10.1016/j.jeconom.2007.05.010.

Prakash, N., & Sethi, M. (2023). Relationship between fixed capital formation and carbon emissions: Impact of trade liberalization in India. Cogent Economics & Finance, 11(1), Article 2245274. https://doi.org/10.1080/23322039.2023.2245274.

Radoine, H., Bajja, S., Chenal, J., & Ahmed, Z. (2022). Impact of urbanization and economic growth on environmental quality in Western Africa: Do manufacturing activities and renewable energy matter? Frontiers in Environmental Science, 10, Article 1012007. https://doi.org/10.3389/fenvs.2022.1012007.

Romero, J., & Gramkow, C. (2021). Economic complexity and greenhouse gas emissions. World Development, 139, Article 105317. https://doi.org/10.1016/j.worlddev.2020.105317.

Salvati, L., & Carlucci, M. (2020). Shaping dimensions of urban complexity: The role of economic structure and socio-demographic local contexts. Social Indicators Research, 147, 263–285. https://doi.org/10.1007/s11205-019-02156-2.

Santos Silva, J. M. C., & Tenreyro, S. (2006). The log of gravity. The Review of Economics and Statistics, 88(4), 641–658. https://doi.org/10.1162/rest.88.4.641.

Revi, A., Satterthwaite, D., Aragón-Durand, F., Corfee-Morlot, J., Kiunsi, R. B. R., Pelling, M., Roberts, D., Solecki, W., Gajjar, S. P., & Sverdlik, A. (2014). Towards transformative adaptation in cities: the IPCC’s Fifth Assessment. Environment & Urbanization, 26(1), 11–28. https://doi.org/10.1177/0956247814523539.

Shurpali, N. J. (2023). Urbanization associated changes in biogeochemical cycles. Global Change Biology, 29(7), 1780–1792. https://doi.org/10.1111/gcb.16698.

Stern, D. I. (2004). The rise and fall of the Environmental Kuznets Curve. World Development, 32(8), 1419–1439. https://doi.org/10.1016/j.worlddev.2004.03.004.

Stern, D. I. (2017). The Environmental Kuznets Curve after 25 years. Journal of Bioeconomics, 19(1), 7–28. https://doi.org/10.1007/s10818-017-9243-1.

UN-Habitat. (2022). World Cities Report 2022: Envisaging the Future of Cities. United Nations Human Settlements Programme. https://unhabitat.org/wcr.

Voukkali, I., Papamichael, I., Loizia, P., & Zorpas, A. (2024). Urbanization and solid waste production: Prospects and challenges. Environmental Science and Pollution Research, 30(24), 71146–71157. https://doi.org/10.1007/s11356-023-27670-2.

Wang, J., & Wang, R. (2024). The impact of urbanization on environmental quality in ecologically fragile areas: Evidence from Hengduan Mountain, Southwest China. Land, 13(4), Article 503. https://doi.org/10.3390/land13040503.

Wei, L., Cheng, Y., Wang, Z., Pan, Z., & Qi, G. (2025). Does multidimensional urbanization help reduce environmental pollution? Evidence from three major urban agglomerations in the Yangtze River Economic Belt. Sustainability, 17(3), Article 1202. https://doi.org/10.3390/su17031202.

World Bank. (2024). World Development Indicators (WDI). https://databank.worldbank.org/source/world-development-indicators.

Xu, Z., & Luo, J. (2025). Sustainable urbanization: Unpacking the link between urban clusters and environmental protection. Sustainability, 17(3), Article 873. https://doi.org/10.3390/su17030873.

Yale Center for Environmental Law & Policy. (2024). Environmental Performance Index (EPI). https://epi.yale.edu/.

Zhang, X., Han, L., Wei, H., Tan, X., Zhou, W., Li, W., & Qian, Y. (2022). Linking urbanization and air quality together: A review and a perspective on the future sustainable urban development. Journal of Cleaner Production, 372, Article 130988. https://doi.org/10.1016/j.jclepro.2022.130988.

Zhu, T. (2025). The coupling relationship of urbanization and atmospheric environment in Shenzhen. Theoretical and Natural Science. Advance online publication. https://doi.org/10.54254/2753-8818/2024.la19358.

Zou, C., Zhu, J., Lou, K., & Yang, L. (2022). Coupling coordination and spatiotemporal heterogeneity between urbanization and ecological environment in Shaanxi Province, China. Ecological Indicators, 141, 109152. https://doi.org/10.1016/j.ecolind.2022.109152.