The Value of Offshore Secrets – Evidence from the Panama Papers James O’Donovan† Hannes Wagner‡ Stefan Zeume †‡ INSEAD Bocconi University University of Michigan First Draft: April 19, 2016 This Draft: November 18, 2016 ______________________ We thank Morten Bennedsen, Art Cockfield (discussant), Alexander Dyck, Julian Franks, John Gallemore, Nicola Gennaioli, Jim Hines, Karl Lins, Colin Mayer, Tom Neubig (discussant) Bastian Obermayer (Sueddeutsche Zeitung), Marco Ottaviani, Paolo Pasquariello, Uday Rajan, Fabiano Schivardi, Andrei Shleifer, and Joel Slemrod for insights that have benefitted this paper. We also thank participants at the Texas/Waterloo Tax Symposium 2016, the National Tax Association Annual Conference 2016, the Italian Economic Assocation Annual Conference 2016, and seminar participants at Concordia University, McGill University, and the University of Michigan (Finance, Public Finance). We are indebted to the International Consortium of Investigative Journalists for providing access to the Panama Papers data through their webpage. All remaining errors are our own. † Department of Finance, INSEAD,
[email protected]. ‡ Department of Finance, Bocconi University,
[email protected]. ‡† Department of Finance, University of Michigan,
[email protected]. The Value of Offshore Secrets – Evidence from the Panama Papers Abstract We use the data leak of the Panama Papers on April 3, 2016 to study whether and how the use of secret offshore vehicles affects firm value around the world. The data provide insights into the operations of more than 214,000 shell companies incorporated in tax havens by Panama-based law firm Mossack Fonseca. Using event study techniques, we find that the data leak erases US$135 billion in market capitalization among 397 public firms with direct exposure to the revelations of the Panama Papers, reflecting 0.7 percent of their market value.