| Id |
Subject |
Object |
Predicate |
Lexical cue |
| T101 |
0-234 |
Sentence |
denotes |
In Eq. 2, the instrumental variables include averages of daily maximum temperature, total precipitation, average wind speed, and the interaction between precipitation and wind speed, for city c in the preceding third and fourth weeks. |
| T102 |
235-332 |
Sentence |
denotes |
Detailed discussion of the selection of weather characteristics as instruments is in Section 3.2. |
| T103 |
333-387 |
Sentence |
denotes |
The timeline of key variables are displayed in Fig. 1. |
| T104 |
388-669 |
Sentence |
denotes |
The primary assumption on the instrumental variables is that weather conditions before 2 weeks do not affect the likelihood that a person susceptible to the virus contracts the disease, conditional on weather conditions and the number of infectious people within the 2-week window. |
| T105 |
670-846 |
Sentence |
denotes |
On the other hand, they affect the number of other persons who have become infectious within the 2-week window, because they may have contracted the virus earlier than 2 weeks. |
| T106 |
847-1005 |
Sentence |
denotes |
These weather variables are exogenous to the error term and affect the spread of the virus, which have been used by Adda (2016) to instrument flu infections9. |
| T107 |
1006-1038 |
Sentence |
denotes |
Fig. 1 Timeline of key variables |
