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. Author manuscript; available in PMC: 2020 Mar 18.
Published in final edited form as: Am Econ Rev. 2019 Dec;109(12):4178–4219. doi: 10.1257/aer.20180279

Figure 7. Relationship between the Strength of the First Stage and Wind Speed.

Figure 7.

Notes: This figure reports the F-statistic for our first stage (equation (2)) for ten different subsamples that each include only days that fall within a particular wind speed decile. The F-statistic is lowest when the sample is limited to days with low wind speeds.