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Adaptive hybrid Metropolis-Hastings samplers for DSGE models

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Author Info

  • Strid, Ingvar

    ()
    (Dept. of Economic Statistics, Stockholm School of Economics)

  • Giordani, Paolo

    ()
    (Research division, Sveriges Riksbank)

  • Kohn, Robert

    ()
    (Australian School of Business, University of New South Wales)

Abstract

Bayesian inference for DSGE models is typically carried out by single block random walk Metropolis, involving very high computing costs. This paper combines two features, adaptive independent Metropolis-Hastings and parallelisation, to achieve large computational gains in DSGE model estimation. The history of the draws is used to continuously improve a t-copula proposal distribution, and an adaptive random walk step is inserted at predetermined intervals to escape difficult points. In linear estimation applications to a medium scale (23 parameters) and a large scale (51 parameters) DSGE model, the computing time per independent draw is reduced by 85% and 65-75% respectively. In a stylised nonlinear estimation example (13 parameters) the reduction is 80%. The sampler is also better suited to parallelisation than random walk Metropolis or blocking strategies, so that the effective computational gains, i.e. the reduction in wall-clock time per independent equivalent draw, can potentially be much larger.

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File URL: http://swopec.hhs.se/hastef/papers/hastef0724.pdf
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Bibliographic Info

Paper provided by Stockholm School of Economics in its series Working Paper Series in Economics and Finance with number 724.

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Length: 33 pages
Date of creation: 14 Feb 2010
Date of revision:
Handle: RePEc:hhs:hastef:0724

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Related research

Keywords: Markov Chain Monte Carlo (MCMC); Adaptive Metropolis-Hastings; Parallel algorithm; DSGE model; Copula;

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Cited by:
  1. Marco Del Negro & Frank Schorfheide, 2012. "DSGE model-based forecasting," Staff Reports 554, Federal Reserve Bank of New York.
  2. Edward P. Herbst & Frank Schorfheide, 2013. "Sequential Monte Carlo Sampling for DSGE Models," NBER Working Papers 19152, National Bureau of Economic Research, Inc.

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