Dr. Yabibal M. Walle

  • Postdoctoral researcher at the Chair of Econometrics (Prof. Dr. Helmut Herwartz)

Educational background:

Research interests:

  • Econometrics: panel data econometrics, panel unit root and cointegration testing, big data analytics, machine learning, functional coefficient modelling, bootstrapping, Structural Vectorautoregressive (SVAR) models
  • Finance and Development Economics: the finance-growth nexus, financial inclusion, financial literacy and gender, firm growth and productivity, migration
  • Macroeconomics: economic growth, income inequality, infrastructure, institutions

Publications in refereed journals:

  1. Tran, V.T., Walle, Y.M, and Herwartz, H. (2020) The impact of local financial development on firm growth in Vietnam: Does the level of corruption matter?, European Journal of Political Economy, forthcoming.
  2. Zergawu, Y.Z., Walle, Y.M., and Gimenez-Gomez, J.M. (2020) The joint impact of infrastructure and institutions on economic growth, Journal of Institutional Economics, forthcoming.
  3. Herwartz, H., and Walle, Y.M. (2020) Do rising top incomes spur economic growth? evidence from OECD countries based on a novel identification strategy, Review of Income and Wealth, 66(1): 126-160.
  4. Herwartz, H., Maxand, S. and Walle, Y.M. (2019) Heteroskedasticity-robust unit root testing for trending panels, Journal of Time Series Analysis, 40(5): 649-664.
  5. Gimenez-Gomez, J.M, Walle, Y.M., and Zergawu, Y.Z. (2019) Trends in African migration to Europe: drivers beyond economic motivations, Journal of Conflict Resolution, 3(8): 1797-1831.
  6. Herwartz, H., Maxand, S., Raters, F., and Walle, Y.M. (2018) Panel unit root tests for heteroskedastic panels, Stata Journal, 18(1): 184-196.
  7. Herwartz, H. and Walle, Y.M. (2018) A powerful wild bootstrap diagnosis of panel unit roots under linear trends and time-varying volatility, Computational Statistics, 33(1): 379-411.
  8. Tran, V.T., Walle, Y.M., and Herwartz, H. (2018) Local financial development and household welfare in Vietnam: evidence from a panel survey, Journal of Development Studies, 54(4): 619-640.
  9. Herwartz, H., Siedenburg, F., and Walle, Y.M. (2016) Heteroskedasticity robust panel unit root testing under variance breaks in pooled regressions, Econometric Reviews, 35(5): 727-750.
  10. Herwartz, H. and Walle, Y.M. (2014) Openness and the finance-growth nexus, Journal of Banking & Finance, 48: 235-247.
  11. Walle, Y.M. (2014) Revisiting the finance-growth nexus in Sub-Saharan Africa: results from error correction-based panel cointegration tests, African Development Review, 26(2): 310-321.
  12. Herwartz, H. and Walle, Y.M. (2014) Determinants of the link between financial and economic development: evidence from a functional coefficient model, Economic Modelling, 37: 417-427.
  13. Hartmann, M., Herwartz, H., and Walle, Y.M. (2012) Where enterprise leads, finance follows. In-sample and out-of-sample evidence on the causal relation between finance and growth, Economics Bulletin, 32(1): 871-882.

Working papers:

  1. Zergawu, Y.Z., Walle, Y.M., and Gimenez-Gomez, J.M. (2018) The joint impact of infrastructure and institutions on economic growth, Department of Economics Working Papers, No. 22 - 2018, Universitat Rovira i Virgili.
  2. Gimenez-Gomez, J.M, Walle, Y.M., and Zergawu, Y.Z. (2017) Trends in African migration to Europe: drivers beyond economic motivations, Center for European, Governance and Economic Development Research Discussion Papers No. 330, Georg-August-Universität Göttingen.
  3. Herwartz, H., Maxand, S. and Walle, Y.M (2017) Heteroskedasticity-robust unit root testing for trending panels, Center for European, Governance and Economic Development Research Discussion Papers No. 314, Georg-August-Universität Göttingen.
  4. Ute , U. and Walle, Y.M (2015) The financial literacy gender gap: A question of nature or nurture?, Courant Research Centre: Poverty, Equity and Growth - Discussion Papers No. 176, Georg-August-Universität Göttingen.
  5. Walle, Y.M. (2010) Tourist flows and its determinants in Ethiopia, Ethiopian Development Research Institute Working Paper 001.

Grants/fellowships:

  • 2019 – 2021: Local Financial Development and Economic Growth in Vietnam. German Science Foundation (DFG), Research Grant. Co-investigator: Helmut Herwartz. 146,400 Euro.
  • 2015–2016: Start-up Funding for Junior Academics. University of Goettingen
  • 2009–2013: Research Grant for Doctoral Studies. German Academic Exchange Service (DAAD), University of Kiel
  • 2008–2009: Determinants of Tourist Flows in Ethiopia. Ethiopian Development Research Institute, Addis Ababa, Ethiopia
  • 04/2007-07/2007: Short Term Research Scholarship. German Academic Exchange Service (DAAD), University of Kiel, Germany
  • 2005–2007: In-Country Scholarship for Graduate Studies. German Academic Exchange Service (DAAD), Addis Ababa University, Ethiopia

Teaching: