These commands work like CHG!,
DEL!, PTY!, and UNC!, respectively, applied to a NUM! command. Thus, if dem88
is the number of votes for the Democratic candidate, and rep88 is the number
for the Republican, PTYNUM!dem88&rep88 is a partisan control variable
(
if the vote proportion NUM!dem88&rep88 is below 0.5 and 1 if it is
above 0.5). You can use the alias command to reduce the length of this
variable name if you wish.
Gary King
2006-01-07
