TY - CHAP A1 - Singer, E. T1 - The use of incentives to reduce nonresponse in household surveys Y1 - 2002 A3 - Groves, R.M. A3 - Dillman, D.A. A3 - Eltinge, J. A3 - Little, R.J.A. T2 - Survey nonresponse CY - New York PB - Wiley ER -