Miranda-Agrippino, Silvia and Hacıoglu Hoke, Sinem (2018) When creativity strikes: news shocks and business cycle fluctuations. CFM Discussion Paper Series (CFM-DP2018-23). Centre For Macroeconomics, London School of Economics and Political Science, London, UK.
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Abstract
We use monthly US utility patent applications to construct an external instrument for identification of technology news shocks in a rich-information VAR. Technology diffuses slowly, and affects total factor productivity in an S-shaped pattern. Responsible for about a tenth of economic fluctuations at business cycle frequencies, the shock elicits a slow, but large and positive response of quantities, and a sluggish contraction in prices, followed by an endogenous easing in the monetary stance. The ensuing economic expansion substantially anticipates any material increase in TFP. Technology news are strongly priced-in in the stock market on impact, but measures of consumers’ expectations take sensibly longer to adjust, consistent with a New-Keynesian framework with nominal rigidities, and featuring informationally constrained agents.
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