A. Ronald Gallant

Department of Economics
Penn State University
University Park, PA 16802

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NBER Working Papers and Publications

April 2010Tapping the Supercomputer Under Your Desk: Solving Dynamic Equilibrium Models with Graphics Processors
with Eric M. Aldrich, Jesús Fernández-Villaverde, Juan F. Rubio-Ramírez: w15909
This paper shows how to build algorithms that use graphics processing units (GPUs) installed in most modern computers to solve dynamic equilibrium models in economics. In particular, we rely on the compute unified device architecture (CUDA) of NVIDIA GPUs. We illustrate the power of the approach by solving a simple real business cycle model with value function iteration. We document improvements in speed of around 200 times and suggest that even further gains are likely.

Published: Aldrich, Eric M. & Fernández-Villaverde, Jesús & Ronald Gallant, A. & Rubio-Ramírez, Juan F., 2011. "Tapping the supercomputer under your desk: Solving dynamic equilibrium models with graphics processors," Journal of Economic Dynamics and Control, Elsevier, vol. 35(3), pages 386-393, March. citation courtesy of

May 2007Rational Pessimism, Rational Exuberance, and Asset Pricing Models
with Ravi Bansal, George Tauchen: w13107
The paper estimates and examines the empirical plausibiltiy of asset pricing models that attempt to explain features of financial markets such as the size of the equity premium and the volatility of the stock market. In one model, the long run risks model of Bansal and Yaron (2004), low frequency movements and time varying uncertainty in aggregate consumption growth are the key channels for understanding asset prices. In another, as typified by Campbell and Cochrane (1999), habit formation, which generates time-varying risk-aversion and consequently time-variation in risk-premia, is the key channel. These models are fitted to data using simulation estimators. Both models are found to fit the data equally well at conventional significance levels, and they can track quite closely a new measu...

Published: Ravi Bansal & A. Ronald Gallant & George Tauchen, 2007. "Rational Pessimism, Rational Exuberance, and Asset Pricing Models," Review of Economic Studies, Blackwell Publishing, vol. 74(4), pages 1005-1033, October. citation courtesy of

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