Still More on the Bradley Effect

Nate Silver is not quite convinced that there never was a Bradley Effect, but agrees that it has disappeared:

With that said, the evidence is pretty strong that the Bradley Effect in fact used to exist in the 1980s and probably through some point in the 1990s. In this Pew Research article you will find several examples of it, spanning the window from Harold Washington in 1983 to Carol Moseley Braun in 1992.

The evidence is perhaps equally strong, however, that the Bradley Effect does not exist any longer. As can be seen in the Hopkins paper for Harvard University that I have referenced many times, at some point during the mid 1990s the Bradley Effect seems to be disappeared.

He goes on to give a more complete accounting of why it might have disappeared.  All said, a worthwhile read.