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Sampling and estimation techniques for the implementation of new classification systems: the change-over from NACE Rev. 1.1 to NACE Rev. 2 in business surveys
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Relating question type to panel conditioning: comparing trained and fresh respondents
Nonresponse in the recruitment of an internet panel based on probability sampling
The Three-Step Test-Interview (TSTI): an observation-based method for pretesting self-completion questionnaires
Incentives and ethnic minorities: results of a controlled randomized experiment in the Netherlands