TY - CONF T1 - Changes in interviewer-related error over the course of the field period: An empirical examination using paradata T2 - American Association for Public Opinion Research 2014 Annual Conference Y1 - 2014 A1 - Olson, K. A1 - Kirchner, A. JF - American Association for Public Opinion Research 2014 Annual Conference CY - Anaheim, CA UR - http://www.aapor.org/AAPORKentico/Conference/Recent-Conferences.aspx ER -