János Köllő

Research Fellow

Institute of Economics, Budapest

kollo.janos@krtk.mta.hu

External Homepage CV

Research Interests

János Köllõ studied economics at the Budapest (then Karl Marx) University in 1972-77. He has a doctoral degree in sociology (1980) and a "candidate's degree" (Ph.D.) in economics (1990). He is a full-time researcher at the Institute of Economics of the Hungarian Academy of Sciences (1977-92, 1994-). Served as a visiting researcher in Collegium Budapest Institute for Advanced Study (1993-94), and the William Davidson Institute, Ann Arbor (2003).
He has been engaged in the analysis of labor markets, industrial relations and the transformation of Central and East European labor markets in the post-communist period.

He joined IZA as a Research Fellow in October 2000.

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IZA Publications

IZA Discussion Paper No. 16645

How Do Firms Deal with the Risks of Employing Ex-prisoners?

János Köllő, István Boza, Virág Ilyés, Zsófia Kőműves, Lili Katalin Mark

IZA Discussion Paper No. 13040

Wage Gains from Foreign Ownership: Evidence from Linked Employer-Employee Data

János Köllő, István Boza, László Balázsi

IZA Discussion Paper No. 10800

Eliciting Permanent and Transitory Undeclared Work from Matched Administrative and Survey Data

Peter Elek, János Köllő

IZA Discussion Paper No. 8644

Labor Market Careers Before and After Incarceration

János Köllő, Bence Czafit

published as 'Employment and wages before and after incarceration - evidence from Hungary' in: IZA Journal of European Labor Studies. 2015, 4:21

IZA Discussion Paper No. 7632

Patterns of Integration: Low Educated People and their Jobs in Norway, Italy and Hungary

János Köllő

published in: Economics of Transition, 2015, 23(1), 105-134

IZA Discussion Paper No. 6224

Detecting Wage Under-reporting Using a Double Hurdle Model

Peter Elek, János Köllő, Balázs Reizer, Péter A. Szabó

published in: Informal Employment in Emerging a Transition Economies, Research in Labor Economics, 34,. Emerald Group Publishing Limited, 2012, 135-166

IZA Discussion Paper No. 5539

Whose Children Gain from Starting School Later? Evidence from Hungary

Szilvia Hámori, János Köllő

published in: Educational Research and Evaluation, 2012, 18 (5), 459-488

IZA Discussion Paper No. 2179

Transition with Heterogeneous Labor

Katalin Balla, János Köllő, András Simonovits

published in: Structural Change and Economic Dynamics, 2008, 19 (3), 203-220.

IZA Discussion Paper No. 1073

The Changing Demand for Skills: Evidence from the Transition

Simon Commander, János Köllő

published in: Economics of Transition, 2008, 16 (2), 199-221.