"The Data that did not arrive for the Date. Talkin' the Nonresponse Blues" Karsten Boye Rasmussen Department of Marketing and Management, University of Southern Denmark, Odense, Denmark Heiko Thimm School of Engineering, Pforzheim University, Pforzheim, Germany

Did not answer

Number of pregnancies MaleFemale Did not answer 0-nErrorOK over nErrorProbable error

Did not answer - skip pattern Number of pregnancies Male Should not answer Female Should answer Did not answer IrrelevantNo answer 0-nErrorOK over nErrorProbable error

Did not answer Number of pregnancies Male Should not answer Female Should answer Did not answer IrrelevantNo answer 0-nErrorOK over nErrorProbable error

Did not answer The missing data

Missing Data

Nonresponse

Nonresponse

Nonresponse

logos

eBusco.net survey Production SME companies in South Denmark & North Germany Response rate 12.6% 64 and 66 respectively 130 of the selected 1033 companies !

Response rates in other SME surveys WalesJones, % UKDaniel, 2002a10.4%"deseletion" UKDaniel, 2002b 4.5% SingaporeThong, % 40.6% mortality of firms AustraliaGoode, %

Potential effect of nonresponse 64 of 130 companies have an English web-site Thats 50% How about the 903 nonrespondents? A extreme: They all have English web-site => 94% B extreme: None have English web-site => 6% So the correct answer would be: 50% +/- 44%

The Blues Woody Guthrie

The Blues Talkin' World War III Blues

Potential effect of nonresponse 64 of 130 companies have an English web-site Thats 50% How about the 903 nonrespondents? A extreme: They all have English web-site => 94% B extreme: None have English web-site => 6% So the correct answer would be: 50% +/- 44%

Confidence intervals for nonresponse

Comparison with known value "archival analysis" as the quest for "the third variable" in causality we have not found the variable causing nonresponse yet Data Source

Extrapolation of the nonrespondents The respondents And the late respondents Assuming nonresponse = late Question: How difficult is it to join two points with a straight line? Time

Data Source phone calls Passive showing not planned socially acceptable but did not find the time Active Expressing planned behavior Passive Busy No answer Active Uinterested Passive Polite

phone calls Passive nonresponse will not have nonresponse bias Active nonresonse will have nonresponse bias Rogelberg and Stanton (2007, p. 201) Passive Busy No answer Active Uinterested Passive Polite

Thundershields soldiers? Are nonrespondents.. Karlsten - Marstrand became a nobleman 1716 and got his name former Peter Wessel

Contact and participation SurveyNo contact Contact with Business agency Total Nonresponse % % 441 Participation in survey % % 64 Total Data Source

Conclusion Significant difference! Nonrespondents are different!

thanks talkin' Karsten Boye Rasmussen associate professor Institute of Marketing and Management University of Southern Denmark Campusvej 55, DK-5230 Odense M, Denmark fax: ?

Talkin' World War III blues Well, now time passed and now it seems Everybody's having them dreams. Everybody sees themselves walkin' around with no one else. Half of the people can be part right all of the time, Some of the people can be all right part of the time. But all the people can't be all right all the time I think Abraham Lincoln said that. "I'll let you be in my dreams if I can be in yours," I said that.