Christian B. Rammer

Zentrum für Europäische Wirtschaftsforschung GmbH (ZEW) is an independent investment research firm headquartered in Mannheim, Germany. Founded in 1990, the firm conducts research in the field of applied and policy-oriented economics and provides national and international research with important data sets via its research data center. They support politicians, companies and administrations at national and European level in overcoming economic policy challenges through in-depth advice. ZEW pursues the economic analysis of functioning markets and institutions in Europe as an overarching research guiding principle. Their main research interests are in the areas of competition and regulation. Methodologically, research at ZEW is based in particular on microeconomic and micro econometric approaches.

LetterOne Holdings SA (L1) is an independent private equity firm headquartered in Luxembourg, Luxembourg. The firm was founded in 2013 by Mikhail Fridman.

Providence Equity Partners, Inc. operates as an asset management firm. It serves media, communications, education, and information sectors. The company was founded in by Jonathan Milton Nelson 1989 and is headquartered in Providence, RI.