The survey methodology literature has debated whether advance letters to potential survey respondents will reduce nonresponse bias and thereby improve the accuracy of preelection forecasts. This research note analyzes the results of experiments conducted in Maryland, New York, and Pennsylvania...

Survey researchers have long been concerned with the question of whether participation in preelection surveys increases voter turnout. This article presents findings from three large-scale field experiments conducted during the 2002 general election in Maryland, New York, and Pennsylvania....