·“The Inflation-Output Trade-Off with Downward Wage Rigidities,” NBER Working Paper No. 15762. (February 2010.) (with Luca Antonio Ricci) Replace previous working paper “The Inflation-Unemployment Trade-Off at Low Inflation,” NBER Working Paper No. 13986. (April 2008.) (with Luca Antonio Ricci.) which contains additional material.

·“New-Keynesian Economics: An AS-AD View,” NBER Working Paper No. 14824. (March 2009.)

· “International Portfolio Allocation under Model Uncertainty,” NBER Working Paper No. 14734. (February 2009.) (with Salvatore Nisticó.) Replace previous working paper “Portfolio Choices with Near Rational Agents: A Solution to Some International-Finance Puzzles,” NBER Working Paper No. 13173. (June 2007.)

·“Linear-Quadratic Approximation of Optimal Policy Problems,” NBER Working Paper No. 12672. (November 2006, revised September 2007) (with M. Woodford .) Supplementary note available here.

·“Overconfidence, Subjective Perception and Pricing Behavior,” NBER Working Paper No. 11922. (January 2006.) (with A. Karantounias.)

·“Inflation Differentials in a Currency Area: Facts, Explanation and Policy,” mimeo. (December 2004) (with F. Altissimo and D. Rodriguez Palenzuela.)