Source data archives:

Main study: at DANS (P0633); at ICPSR (8121)

Principal investigator(s): C. van der Eijk (University of Amsterdam, the Netherlands), M.j. Koopman (University of Amsterdam, the Netherlands), B. Niemoeller (University of Amsterdam, the Netherlands), S.M.J. Koopman (University of Amsterdam, the Netherlands)

Fieldwork organization: Intomart b.v.

Design: This study contained a single wave election study, which consisted of a fresh sample and a fourth wave of the panel study of 1981-1986. The wave was held after the election campaign. It was decided to conduct a single wave, post election interview because of early elections (15 months after the May 1981 elections) and because of the fact that the elections were to take place shortly after summer vacations (which would yield high nonresponse). The relative short interval between the elections in 1981 and the elections in 1982 allowed for the possibility to re-interview the respondents of the 1981 sample. But also a fresh sample was taken for this study.

Fieldwork dates: The fieldwork was done after the election date from September 1982 till October 1982. The election date was September 8, 1982.

Sampling frame: This study consisted of a multi-stage sampling procedure for the fresh sample. On basis of the PTT post-delivery register, first municipalities were selected both self-selective and non-self-selective. Next there was a selection of households-addresses. For this there was a minimum of four per municipality. Finally one respondent per household was selected. The sample size had been set at 2.500, but slightly more addresses were drawn than originally intended, namely 2.599. Due to more households at the same address, the original sample was 2.646. Because of not inhabited addresses and foreigners, the gross sample was 2.472. The fourth wave sample consisted of 1.206 respondents (these were the respondents who completed all three waves of the election study of 1981.

Response: 1.541 respondents of the fresh sample completed the interview, which means that there was a response rate of 62 percent. The response in fourth wave was 52 percent (which means 1.206 completed interviews in 1982, compared with 2.305 completed interviews in the first wave). When both samples are compared, there is a response (2747 completed interviews) of 58 percent (originally 2.472 respondents in fresh sample and 2.305 fourth wave).

Panel study: This election study did not include a panel study.