“Money and the Size of Transactions,”

 “Machines as Engines of Growth,”

  “Cyclicality of Fiscal Policy: Permanent and Transitory Shocks,” with Michel Strawczynski.

 “The Evolution of Paper Money,” with Oren Levintal.

 “Globalization and Divergence,”

 “Convergence and Divergence: New Data and New Results” with Michele Battisti and Gianfranco di Vaio.

"Automation and Unemployment: Help is on the Way" with Hideki Nakamura.

"Inequality and Public Policy," with Michele Battisti.