CAFER Documentation

US Senate Votes on Corporate Average Fuel Economy Bill


Senate votes for Corporate Average Fuel Economy (CAFE) bill


A data frame with 100 observations on the following 7 variables.

Senator Senator's name
State Code for senator's state
Party party affiliation: D=Democrat, I=Independent, R=Republican
Contribution Contributions from car manufactures (dollars)
LogContr Log of (Contribution+1)
Dem 1=Democrat/Independent 0=Republican
Vote 1=yes or 0=no


The Corporate Average Fuel Economy (CAFE) Bill was proposed by Senators John McCain and John Kerry to improve the fuel economy of cars and light trucks sold in the United States. However a critical vote on an amendment in March of 2002 threatened to indefinitely postpone CAFE. The amendment charged the National Highway Traffic Safety Administration to develop a new standard, the effect being to put on indefinite hold the McCain-Kerry bill. It passed by a vote of 62-38. A political question of interest is whether there is evidence of monetary influence on a senator's vote. Scott Preston, a professor of statistics at SUNY, Oswego, collected data on this vote which includes the vote of each senator (1=Yes or 0=No) and monetary contributions that each of the 100 senators received over his or her lifetime from the car manufacturers.


Thanks to Prof. Scott Preston from SUNY Oswego for the data.