RATIONAL IGNORANCE IN LONG-RUN RISK MODELS

We document an unpleasant feature of Epstein-Zin preferences in a stylized model economy of the long-run risk type now widespread in Asset Pricing: Agents with preference parameters commonly described as indicating a "preference for early resolution of uncertainty" achieve higher utility levels if they can commit to ignoring information on the state of the business cycle. For parameter choices similar to those used to explain asset prices, an agent can achieve utility gains equivalent to a more than 40 % increase in life-time consumption by committing to ignore information on the trend growth rate of the endowment good. We show that opting for such a coarser information set can be implemented and supported as an equilibrium strategy.