Do you get grumpy when it is warmer than seventy degrees Fahrenheit?

I don’t think climate change is the right framing for this effect, nonetheless this is an interesting result, with the subtitle “Evidence from a billion tweets.”  Here is the abstract:

What is the welfare cost of environmental stress? The change in amenity values resulting from temperature increases may be a substantial unaccounted-for cost of climate change. Because there is no explicit market for climate, prior work has relied on cross-sectional variation or survey data to identify this cost. This paper presents an alternative method of estimating preferences over nonmarket goods which accounts for unobserved cross-sectional and temporal variation and allows for precise estimates of nonlinear effects. Specifically, I create a rich dataset on hedonic state: a geographically and temporally dense collection of updates from the social media platform Twitter, scored using a set of both human- and machine-trained sentiment analysis algorithms. Using this dataset, I find limited evidence of temperature effects on hedonic state in low temperatures and strong evidence of a sharp decline in hedonic state above 70◦F. This finding is robust across all measures of hedonic state and to a variety of specifications.

That is the job market paper (pdf) by Patrick Baylis, a job candidate from UC Berkeley.

And here is a new result that Canadians are more polite on Twitter, I wonder what happens if you control for temperature…

For the pointer I thank Samir Varma.


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