Product Market Synergies and Competition in Mergers and Acquisitions: A Text-Based Analysis.
Gerard Hoberg and Gordon Phillips, 2010, Review of Financial Studies 23 (10), 3773-3811.
Product Market Threats, Payouts, and Financial Flexibility
Gerard Hoberg, Gordon Phillips and Nagpurnanand Prabhala, 2014, Journal of Finance 69 (1), 293-324.