European Union antitrust officials have started questioning rival firms about Facebook Inc.'s proposed $19 billion acquisition of messaging service WhatsApp, ahead of a formal review that could be a test case for how to apply EU competition law to the new world of social media. Officials at the European Commission, the EU's central competition authority, have in recent weeks sent detailed questionnaires to several technology and online-messaging companies, asking about the merger's effect on competition in their markets, according to people familiar with the matter.
- Read the article: The Wall Street Journal
