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Euler Equation Errors

  • Martin Lettau
  • Sydney C. Ludvigson

The standard, representative agent, consumption-based asset pricing theory based on CRRA utility fails to explain the average returns of risky assets. When evaluated on cross- sections of stock returns, the model generates economically large unconditional Euler equation errors. Unlike the equity premium puzzle, these large Euler equation errors cannot be resolved with high values of risk aversion. To explain why the standard model fails, we need to develop alternative models that can rationalize its large pricing errors. We evaluate whether four newer theories at the vanguard of consumption-based asset pricing can explain the large Euler equation errors of the standard consumption-based model. In each case, we find that the alternative theory counterfactually implies that the standard model has negligible Euler equation errors. We show that the models miss on this dimension because they mischaracterize the joint behavior of consumption and asset returns in recessions, when aggregate consumption is falling. By contrast, a simple model in which aggregate consumption growth and stockholder consumption growth are highly correlated most of the time, but have low or negative correlation in severe recessions, produces violations of the standard model's Euler equations and departures from joint lognormality that are remarkably similar to those found in the data.

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Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 11606.

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Date of creation: Sep 2005
Publication status: published as Martin Lettau & Sydney Ludvigson, 2008. "Code and data files for "Euler Equation Errors"," Computer Codes 08-106, Review of Economic Dynamics.
Handle: RePEc:nbr:nberwo:11606
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