Essay

Evaluating a Policy's Effectiveness Using Consumer Theory

A city government is considering a new tax on sugary drinks to reduce consumption. An economist predicts that this tax, by raising the price, will lead to a total decrease in consumption of 100,000 drinks per week. They also predict that the component of this decrease attributable to the reduction in consumers' real purchasing power will be a reduction of 10,000 drinks.

A policy critic argues, 'This tax is a poor tool for public health because the vast majority of the change is simply consumers switching to other drinks, not a meaningful change in behavior due to feeling less wealthy.'

Evaluate the critic's argument. Your evaluation must:

  1. First, calculate the change in consumption that is due solely to sugary drinks becoming more expensive relative to other goods.
  2. Use your calculation to assess whether the critic's claim about the magnitude of the effects is factually correct.
  3. Finally, discuss whether this breakdown of effects supports the critic's conclusion that the tax is a 'poor tool.'

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Updated 2025-07-27

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Introduction to Microeconomics Course

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