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Measuring the Unmeasurable? Systematic Evidence on Scale Transformations in Subjective Survey Data

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  • Caspar Kaiser
  • Anthony Lepinteur
Abstract
Economists routinely use survey measures of, for example, risk preferences, trust, political attitudes, or wellbeing. The literature generally treats numerical response categories as if they represent equal psychological intervals. We provide the first systematic test of this assumption, developing a general framework to quantify how easily results can be overturned when this linearity assumption is relaxed. Using original experimental data, we show that respondents interpret survey scales in ways that do deviate from linearity, but only mildly. Focusing on wellbeing research, we then replicate 30,000+ coefficient estimates across more than 80 papers published in top economics journals. Replicated coefficient signs are remarkably robust to mild departures from linear scale-use. However, statistical inference and estimates of relative effect magnitudes become unreliable, even under modest departures from linearity. This is especially problematic for policy applications. We show that these concerns generalise to many other widely used survey-based constructs.

Suggested Citation

  • Caspar Kaiser & Anthony Lepinteur, 2025. "Measuring the Unmeasurable? Systematic Evidence on Scale Transformations in Subjective Survey Data," Papers 2507.16440, arXiv.org.
    • Handle: RePEc:arx:papers:2507.16440
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    File URL: http://arxiv.org/pdf/2507.16440
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