@conference {2157,
	title = {Changes in interviewer-related error over the course of the field period: An empirical examination using paradata},
	booktitle = {American Association for Public Opinion Research 2014 Annual Conference},
	year = {2014},
	address = {Anaheim, CA},
	url = {http://www.aapor.org/AAPORKentico/Conference/Recent-Conferences.aspx},
	author = {Olson, K. and Kirchner, A.}
}