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, migration
  • Macroeconomics: economic growth, income inequality, infrastructure, institutions

Publications in refereed journals:

  1. Herwartz, H., Maxand, S. and Walle, Y.M. (2019) Heteroskedasticity-robust unit root testing for trending panels, Journal of Time Series Analysis.
  2. 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. Herwartz, H., and Walle, Y.M. (2018) Do rising top incomes spur economic growth? evidence from OECD countries based on a novel identification strategy, Review of Income and Wealth.
  4. Herwartz, H., Maxand, S., Raters, F., and Walle, Y.M. (2018) Panel unit root tests for heteroskedastic panels, Stata Journal, 18(1): 184-196.
  5. 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.
  6. 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.
  7. 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.
  8. Herwartz, H. and Walle, Y.M. (2014) Openness and the finance-growth nexus, Journal of Banking & Finance, 48: 235-247.
  9. 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.
  10. 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.
  11. 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.

Fellowships/grants:

  • 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: