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Maximizing data quality using mode switching in mixed-device survey design: nonresponse bias and models of demographic behavior

"Conducting survey interviews on the internet has become an attractive method for lowering data collection costs and increasing the frequency of interviewing, especially in longitudinal studies. However, the advantages of the web mode for studies with frequent reinterviews can be offset by the serious disadvantage of low response rates and the potential for nonresponse bias to mislead investigator…