Sampling Methods for Random Digit Dialing

摘要: Abstract A method of sample selection for household telephone interviewing via random digit dialing is developed which significantly reduces the cost such surveys as compared to numbers completely at random. The sampling carried out through a two-stage design and has unusual feature that although all units have same probability selection, it not necessary know probabilities first-stage or second-stage units. Simple possible numbers, within existing exchanges, inefficient because only about 20 percent these are actually assigned households. proposed proportion unused sharply.