出典:Wikipedia
出典:『Wikipedia』 (2011/06/03 11:39 UTC 版)
The Cook Partisan Voting Index (CPVI), sometimes referred to as simply the Partisan Voting Index (PVI), is a measurement of how strongly an American congressional district or state leans toward one political party compared to the nation as a whole. It was developed in 1997 by Charlie Cook of the Cook Political Report, a nonpartisan political newsletter, working with Polidata, a political statistics analysis firm.