Stata Compatible Time Index
Standard Quarterly Time Index
President's Approval Rating
Sociotropic Retrospective Econo
Sociotropic Prospective Economi
Eisenhower's Term Dummy
Political Events Indicator
Bush's Term Dummy
Ford's Term Dummy
1st Quarter of Bush's Term Dumm
2nd Quarter of Bush's Term Dumm
1st Quarter of Ford's Term Dumm
2nd Quarter of Ford's Term Dumm
1st Quarter of Carter's Term Du
2nd Quarter of Carter's Term Du
1st Quarter of Kennedy's Term D
2nd Quarter of Kennedy's Term D
1st Quarter of Johnson's Term D
2nd Quarter of Johnson's Term D
1st Quarter of Nixon's Term Dum
2nd Quarter of Nixon's Term Dum
1st Quarter of Reagan's Term Du
2nd Quarter of Reagan's Term Du
Carter's Term Dummy
Kennedy's Term Dummy
Johnson's Term Dummy
Personal Retrospective Economic
Personal Prospective Economic E
Nixon's Term Dummy
Reagan's Term Dummy
Vietnam War Casualties
Bush's Gulf War dummy
Republican President Dummy
1 qrtr lag of approval