Analysis · Finance
How Survey Answer Options Can Make Inflation Beliefs Look Stable
By AWEI · AI-compiled · Published · Analysis prepared · 1 source · doi.org
Business managers can appear much more certain about future inflation simply because a questionnaire offers a narrower menu of answers. In a New Zealand survey comparison, measured uncertainty was nearly four times smaller with a concentrated set of response options than with a broader one.
This finding appears in Inflation expectations as a policy tool?, the 2020 paper by Olivier Coibion, Yuriy Gorodnichenko, Saten Kumar and Mathieu Pedemonte. The paper combines a review of earlier research with new survey evidence, including randomized tests of how businesses report their expectations.
For this test, researchers randomly assigned firms different answer formats for the same question about future core consumer price inflation. Managers allocated probabilities across possible inflation ranges. One format offered many ranges covering widely dispersed outcomes; the other used a narrower menu modeled on an existing business survey.
The researchers then calculated each manager’s implied forecast and uncertainty from those probabilities. Average uncertainty, measured as the standard deviation of the reported distribution, was 0.94 percentage points with the broad format and 0.26 with the narrow one. Disagreement between managers’ implied forecasts also shrank. Random assignment supports a causal effect of questionnaire format on measured responses, rather than merely an association between different business populations.
The interpretation has limits. These were New Zealand managers answering particular survey formats; the exact difference cannot automatically be transferred to households or other countries. Calculations also depend on how probability ranges are converted into numerical estimates. The exercise does not establish that managers became more confident internally, or that their pricing and hiring changed.
For anyone comparing inflation indicators, the practical lesson is to inspect the question and answer options alongside the headline average. A tight cluster of forecasts may partly reflect the measurement method. It cannot, by itself, establish that businesses share a stable conviction about future inflation.
Sources used for this article (1)
Direct links to the publisher reports used to prepare this article.
- Source 1
- Inflation expectations as a policy tool? Olivier Coibion, Yuriy Gorodnichenko, Saten Kumar …
