name of dataset: approval
no of variables: 16
no of observations: 78

+------------+---------------------------------------------+
| variable   | label                                       |
+------------+---------------------------------------------+
| id         | id                                          |
| month      | month                                       |
| year       | year                                        |
| sp500      | S&P 500 index                               |
| cpi        | Consumer Price Index                        |
| cpifood    | CPI for food                                |
| approve    | Gallup approval rate - percent              |
| gasprice   | average gas price - cents                   |
| unemploy   | unemployment rate - percent                 |
| katrina    | =1 for three months after Hurricane Katrina |
| rgasprice  | real gas price - 100*(gasprice/cpi)         |
| lrgasprice | log(rgasprice)                              |
| sep11      | =1 for 09/2001 and two months following     |
| iraqinvade | =1 for three months after Iraq invasion     |
| lsp500     | log(sp500)                                  |
| lcpifood   | log(cpifood)                                |
+------------+---------------------------------------------+

Harbridge, L., J. Krosnick, and J.M. Wooldridge (forthcoming),
“Presidential Approval and Gas Prices: Sociotropic or Pocketbook
Influence?” in New Explorations in Political Psychology, ed. J.
Krosnick. New York: Psychology Press (Taylor and Francis Group).
Professor Harbridge kindly provided the data, of which I have used a
subset.