This paper compares the welfare costs of business cycles in a dollarized ec
onomy to those arising in economies in which monetary policy takes the form
of inflation targeting, money growth rate pegs, or devaluation rate rules.
The analysis is conducted within an optimizing model of a small open econo
my with sticky prices. The model is calibrated to the Mexican economy and i
s driven by three external shocks: terms of trade, world interest rate, and
import-price inflation. The welfare comparisons suggest that dollarization
is the least successful of the monetary policies considered. Agents are wi
lling to give up between 0.1 and 0.3 percent of their nonstochastic steady-
state consumption to see a policy other than dollarization implemented.