@DanGamarnik@kjhealy@jon_mellon I think the point is that weather has been used to instrument for so many IVs that you can find studies where weather has been theorized to affect your DV where said DV is the IV in another study. A mic drop of a point.
@velezjorge@orgRem@SampsaSamila I'd underline @orgRem's point, which we do in the paper. You must rule out self-selection as it could "just" be substitution, which we do. But self-selection is also an important explanatory mechanism here. In that regard, this differs from many previous innovation studies.