Francis Bloch, Gabrielle Demange, 17 December 2020

Tax avoidance by multinational firms presents a substantial challenge to policymakers and to international organisations. This column explores two possible policy regimes that could be introduced to target global firms focused on digital services: separate accounting and formula apportionment. The results of the study suggest that the separate accounting approach could be optimal, inducing lower efficiency costs and larger fiscal revenues. Such a policy regime would also make country-by-country reporting compulsory and reliable, which would induce additional outside benefits.

Jie Bai, Maggie Chen, Jin Liu, Daniel Yi Xu, 15 December 2020

Global e-commerce platforms present new export opportunities for small and medium-sized enterprises in developing countries by significantly lowering the entry barriers of exporting. This column shows, however, that the lack of market selection can lead to severe congestion in consumers' search process and, when firms' intrinsic quality is not perfectly observed, hinder market allocation towards better firms. Policies aimed at alleviating information frictions and reducing the number of firms can help to improve allocative efficiency and raise consumer welfare.

Elena Argentesi, Paolo Buccirossi, Emilio Calvano, Tomaso Duso, Alessia Marrazzo, Salvatore Nava, 04 March 2020

Dominant companies in the digital market may use merger and acquisitions – especially ‘killer’ or ‘zombie’ acquisitions – and the (under)enforcement of merger control to stifle competition and cement their market dominance. This column analyses acquisition activity by Amazon, Facebook, and Google between 2008 and 2018, and finds that they often targeted very young firms. Because the evolution of young firms is still uncertain, it is difficult for competition authorities to assess the effects of these mergers, especially when the focus is on single acquisitions without considering the overall acquisition strategy.


The intensive course in Competition in Digital Markets will be held at the Barcelona GSE from November 20 to 22, 2019. This course offers the opportunity to understand how the digital economy works, and under what conditions competition may not function as it should in this sector. It provides participants with a thorough understanding of how to evaluate the substitutability between different offerings and when to view practices such as tying, exclusive contracts, price-parity clauses, and discriminatory access to platforms as anti-competitive (but also explain in what circumstances they are likely to be beneficial).

Course lecturers includes leading international competition scholars and practitioners with extensive experience of the application of economic techniques to competition cases in this area:

Giulio Federico (Head of Unit, CET, DG Competition European Commission)

Chiara Fumagalli (Associate Professor of Economics, Bocconi University)

Massimo Motta (Professor of Economics, ICREA-UPF and Barcelona GSE; former Chief Competition Economist, European Commission) - course director

Martin Peitz (Professor of Economics, University of Mannheim)

An Early Bird discount will be offered to participants confirming their attendance before October 20. A reduced course fee is also available to Regulators, Competition Authorities, Academics and Barcelona GSE Alumni.

Laura Veldkamp, 01 March 2019

The digital economy makes it possible for data-savvy firms to grow very large, very quickly. Laura Veldkamp of Columbia Business School tells Tim Phillips about her new project to model the Big Data economy.

CEPR Policy Research