Moors, J.J.A.; Smeets, R.; Boekema, F.W.M. - Tilburg University, School of Economics and Management - 1996
To estimate the mean sojourn time, a sample of Tilburg fair visitors was asked for the duration of their stay on the fair grounds. The longer a visitor's sojourn, the larger his/her probability of being interviewed will be; therefore, longer sojourn times will be overrepresented in the sample. As...
