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A Multilevel Multinomial Analysis of Interviewer Effects on Various Components of Unit Nonresponse
Pickery, Jan, (2002)
The Impact of Respondent and Interviewer Characteristics on the Number of “No Opinion” Answers
Pickery, Jan, (1998)
The effect of the elapsed time between the initial refusal and conversion contact on conversion success: evidence from the 2nd round of the European social survey
Beullens, Koen, (2010)