Chairs of Statistics and Econometrics

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, functional coefficient modelling, bootstrapping, Structural Vectorautoregressive (SVAR) models
  • Finance and Development Economics: the finance-growth nexus, financial inclusion, financial literacy and gender, migration, institutions, remittances
  • Macroeconomics: economic growth, income inequality

Publications in refereed journals:

  1. 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, (forthcoming).
  2. Herwartz, H., Maxand, S., Raters, F., and Walle, Y.M. (2018) Panel unit root tests for heteroskedastic panels, Stata Journal, 18(1): 184-196.
  3. 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.
  4. 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.
  5. 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.
  6. Herwartz, H. and Walle, Y.M. (2014) Openness and the finance-growth nexus, Journal of Banking & Finance, 48: 235-247.
  7. 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.
  8. 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.
  9. 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. 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.
  2. 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-
  3. 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.
  4. Walle, Y.M. (2010) Tourist flows and its determinants in Ethiopia, Ethiopian Development Research Institute Working Paper 001.