Lukasz Grzybowski


Telecom ParisTech,
Department of Economics and Social Sciences,
46 rue Barrault
75013 Paris, France

Phone: +33 145 817 195


My CV as pdf file

Working Papers

International price differences in online markets - Evidence from portable computers, with Nestor Duch-Brown, Frank Verboven and Andre Romahn, R&R Journal of International Economics

Estimating consumer inertia in repeated choices of smartphones, with Ambre Nicolle, R&R Journal of Industrial Economics

Unbundling the incumbent and deployment of high-speed broadband: Evidence from France, with Maude Hasbi and Marc Bourreau, R&R International Journal of Industrial Organization

Bene fits from competition in a high-inequality economy: The case of mobile telephony in South Africa, with Ryan Hawthorne, submitted

Narrowing the ‘digital divide’: the role of complementarities between fixed and mobile data in South Africa, with Ryan Hawthorne, submitted

Bundling and consumer churn in telecommunications, with Christine Zulehner and Julienne Liang

How bundling impacts entry? Evidence from broadband market, with Christine Zulehner and Roxana Fernandez

International price di erences in online markets - Evidence from portable computers, with Nestor Duch-Brown, Frank Verboven and Andre Romahn

Impact of Internet on the pricing of CD titles in France, with Marc Bourreau and Francois Moreau


Impact of competition, investment and regulation on prices of mobile services: Evidence from France,
with Ambre Nicolle and Christine Zulehner, Economic Inquiry, 2018, 56, Issue 2, pp.1322-1345.

Transition from copper to fiber broadband: The role of connection speed and switching costs
with Julienne Liang and Maude Hasbi, Information Economics and Policy, 2018, 42, pp. 1-10.

The impact of online sales on consumers and firms. Evidence from consumer electronics, with Nestor Duch-Brown, Andre Romahn and Frank Verboven, Frank, International Journal of Industrial Organization, 2017, 52, pp. 30-62.

Infrastructure deficiencies and adoption of mobile money in Sub-Saharan Africa,
with Onkokame Mothobi
Information Economics and Policy, 2017, 40, pp. 71–79.

Substitution between fixed-line and mobile access: the role of complementarities,
with Frank Verboven,
Journal of Regulatory Economics, 2016, 49(2), pp. 113-151.

The role of network effects and consumer heterogeneity in the adoption of mobile phones: evidence from South Africa
Telecommunications Policy, 2015, 39(11), pp. 933–943.

Estimating demand for fixed-mobile bundles and switching costs between tariffs
with Julienne Liang,
Information Economics and Policy, 2015, 33, pp. 1–10.

Market definition of broadband Internet services in Slovakia: are fixed and mobile in the relevant market?
with Rainer Nitsche, Lars Wiethaus and Frank Verboven, 2014, Information Economics and Policy, 28, pp. 39-56

Fixed-to-mobile substitution in the European Union
Telecommunications Policy, 2014, 38(7), pp. 601-612

Estimating broadband diffusion in the EU using NUTS1 regional data,
with Magali Dauvin
Telecommunications Policy, 2014, 38(1), pp. 96-104

Dynamic duopoly competition with switching costs and network externalities,
with Toker Doganoglu

Review of Network Economics, 2013, 12(1), pp.1-25

Screening competition in mobile telephony
Applied E
conomics, 2011, 43(17), pp.2155-2163

Estimating network choices and switching costs in mobile telephony, with Pedro Pereira,

Review of Industrial Organization, 2011, 38(1), pp.23-42

Hedonic study on mobile telephony market in France: price-quality strategies,
with Chiraz Karamti,

Netnomics, 2010, 11(3), pp.255-289

Competition in mobile telephony in France and Germany
, with Chiraz Karamti,

Manchester School, 2010, 78(6), pp.702-724

The consumer welfare loss of minimum charges in mobile telephony
, with Pedro Pereira,

Telecommunications Policy, 2009, 33(3-4), pp. 200-206

Complementarity between calls and messages in mobile telephony
, with Pedro Pereira

Information Economics and Policy, 2008, 20(3), pp.279-287

Estimating switching costs in the mobile telecommunications industry in the UK,

Journal of Industry, Competition and Trade, 2008, 8(2), pp.113-132

The i
mpact of regulation on the retail prices in fixed-line telephony across the European Union,

Telecommunications Policy, 2008, 32(2), pp.131-144

The competitiveness of mobile telecommunications industry across the European Union,

International Journal of the Economics of Business, 2008, 15(1), pp.99-115

Simulation of merger in mobile telephony in Portugal
, with Pedro Pereira

Review of Industrial Organization, 2007, 31(3), pp.205-220

Estimating network effects in the mobile telecommunications industry in Germany
, with Toker Doganoglu,

Information Economics and Policy, 2007, 19(1), pp.65-79

Regulation of mobile telephony across the European Union: an empirical analysis,

Journal of Regulatory Economics, 2005, 28(1), pp.47-67


Current appointment

since 01.2012: Associate Professor, Telecom ParisTech

Other affiliation

since 01.2012: A/Professor, School of Economics, University of Cape Town


06.2015:               Habilitation (Habilitation a diriger des recherches) Universite Paris 1 Pantheon-Sorbonne
05.2001 - 07.2005:
Ph.D. Economics, University of Munich
10.1995 - 10.2000: M.Sc. Warsaw School of Economics

Research appointments

10.2004 - 06.2005: visiting researcher at IDEI, Universite de Toulouse 1
01.2004 - 06.2004: Marie Curie Fellowship at Universitat Pompeu Fabra, Barcelona

05.2001 - 04.2003: researcher at Center for Information and Network Economics, University of Kiel


2010 - 2011: Senior Lecturer, School of Economics, University of Cape Town
2008 - 2010: Manager, Econometrics Team, Ernst & Young, London

2007 - 2008: Economist, UK Competition Commission

2006 - 2007: Visiting Assistant Professor, Universidad de Alicante

2005 - 2006: Post-Doctoral Fellow CEPR RTN Competition Policy in International Markets at Katholieke Universiteit Leuven

2006 - 2006: Trainee at Chief Economist Team, DG Competition, European Commission in Brussels

2003 - 2005: Research Assistant, Center for Information and Network Economics, University of Munich
2001 - 2003: Research Assistant, Center for Information and Network Economics, University of Kiel
1998 - 2001: Database Marketing Manager, Bertelsmann Media, Warsaw
1997 - 1997: Intern, Polkomtel SA, Warsaw