What research studies have been done on survey response bias resulting
from the use of in-house/on-staff interviewers to ask questions rather than
using an independent outside research firm? I am not interested in
articles/papers that merely define response bias or conjecture why/how
it might occur. I have already found many pages like this. I am not
interested in studies/papers on non-response bias. I want
articles/papers on or references to research studies that examine and
analyze such response bias.