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Home | Events Archive | Welfare and Output with Income Effects and Taste Shocks

Welfare and Output with Income Effects and Taste Shocks

  • Series
    Research on Monday
  • Speaker
    Ariel Burstein (UCLA)
  • Location
  • Date and time

    February 14, 2022
    16:00 - 17:00


We characterise how welfare responds to changes in budget sets and technologies when preferences are non-homothetic or subject to shocks, in both partial and general equilibrium.

We generalise Hulten’s theorem, the basis for constructing aggregate quantity indices, to this context using a general-equilibrium formulation of Hicksian demand. We show how to calculate the response of welfare to a shock using only knowledge of expenditure shares and elasticities of substitution (and not of income elasticities and taste shocks). We also characterise the gap between welfare and chain-weighted indices. We apply our results to long- and short-run phenomena.

In the long-run, we show that if structural transformation is caused by income effects or changes in tastes, rather than substitution effects, then Baumol’s cost disease is twice as important for our preferred measure of welfare (equivalent variation at final preferences).In the short-run, we show that standard deflators understate welfare-relevant inflation because product-level demand shocks are positively correlated with price changes.