Search

Begin New Search Topic Markets Author Luca Guerrieri

1. On the Application of Automatic Differentiation to the Likelihood Function for Dynamic General Equilibrium Models

Author:
Houtan Bastani and Luca Guerrieri
Publication Date:
02-2008
Content Type:
Working Paper
Institution:
Board of Governors of the Federal Reserve System
Abstract:
A key application of automatic differentiation (AD) is to facilitate numerical optimization problems. Such problems are at the core of many estimation techniques, including maximum likelihood. As one of the first applications of AD in the field of economics, we used Tapenade to construct derivatives for the likelihood function of any linear or linearized general equilibrium model solved under the assumption of rational expectations. We view our main contribution as providing an important check on finite-difference (FD) numerical derivatives. We also construct Monte Carlo experiments to compare maximum-likelihood estimates obtained with and without the aid of automatic derivatives. We find that the convergence rate of our optimization algorithm can increase substantially when we use AD derivatives.
Topic:
Economics and Markets
Political Geography:
United States

2. International Competition and Inflation: A New Keynesian Perspective

Author:
Luca Guerrieri, Christopher Gust, and David López-Salido
Publication Date:
01-2008
Content Type:
Working Paper
Institution:
Board of Governors of the Federal Reserve System
Abstract:
We develop and estimate an open economy New Keynesian Phillips curve (NKPC) in which variable demand elasticities give rise to changes in desired markups in response to changes in competitive pressure from abroad. A parametric restriction on our specification yields the standard NKPC, in which the elasticity is constant, and there is no role for foreign competition to influence domestic inflation. By comparing the unrestricted and restricted specifications, we provide evidence that foreign competition plays an important role in accounting for the behavior of inflation in the traded goods sector. Our estimates suggest that foreign competition has lowered domestic goods inflation about 1 percentage point over the 2000-2006 period. Our results also provide evidence against demand curves with a constant elasticity in the context of models of monopolistic competition.
Topic:
Economics, International Trade and Finance, and Markets
Political Geography:
United States

3. Oil Shocks and External Adjustment

Author:
Luca Guerrieri, Martin Bodenstein, and Christopher J. Erceg
Publication Date:
06-2007
Content Type:
Working Paper
Institution:
Board of Governors of the Federal Reserve System
Abstract:
This paper investigates how oil price shocks affect the trade balance and terms of trade in a two country DSGE model. We show that the response of the external sector depends critically on the structure of financial market risk-sharing. Under incomplete markets, higher oil prices reduce the relative wealth of an oil-importing country, and induce its nonoil terms of trade to deteriorate, and its nonoil trade balance to improve. The magnitude of the nonoil terms of trade response hinges on structural parameters that affect the divergence in wealth effects across oil importers and exporters, including the elasticity of substitution between oil and other inputs in production, and the discount factor. By contrast, cross-country wealth differences effectively disappear under complete markets, with the implication that oil shocks have essentially no effect on the nonoil terms of trade or the nonoil trade balance.
Topic:
Economics, Foreign Exchange, International Trade and Finance, Markets, and Oil