Uncertainty and Change: Survey Evidence of Firms’ Subjective Beliefs
This paper studies how managers plan under uncertainty. In a new panel survey of German manufacturing firms, we observe both forecasts of sales growth and a quantitative measure of subjective uncertainty. We show that subjective uncertainty reflects change experienced by firms: it is high when growth is either unusually low or unusually high. Subjective uncertainty is more than conditional volatility: while more volatile firms are typically more uncertain, experienced change alone increases uncertainty, consistent with a model of learning. Uncertainty over our sample is mostly idiosyncratic but varies substantially over time and leads managers to plan lower employment and prices.
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Copy CitationRuediger Bachmann, Kai Carstensen, Stefan Lautenbacher, Manuel Menkhoff, and Martin Schneider, "Uncertainty and Change: Survey Evidence of Firms’ Subjective Beliefs," NBER Working Paper 29430 (2021), https://doi.org/10.3386/w29430.Download Citation
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Published Versions
Rüdiger Bachmann & Kai Carstensen & Stefan Lautenbacher & Manuel Menkhoff & Martin Schneider, 2026. "Uncertainty and Change: Survey Evidence of Firms' Subjective Beliefs," American Economic Review, vol 116(8), pages 2806-2849.