New Tools at Statistics Canada to Measure and Evaluate the Impact of Nonresponse and Imputation
نویسندگان
چکیده
Since the 80's, Statistics Canada has invested in the development of generic software for editing and imputation. From the outset, it has been known by practicians and researchers that treating nonresponse, in particular by imputing for missing values, has impacts on estimates. In the 90's, resources were devoted to research how these impacts could be measured. These studies provided a number of answers that have led to the development of two systems (or sets of routines). One is a flexible tool that is used to carry out simulation studies in presence of imputation and under full response. It is called the GENEralised SImulation System (GENESIS). The second one is a System for Estimation of VAriance due to Nonresponse and Imputation (SEVANI). It is designed to provide users with one or more non-sampling variance component due to total or partial nonresponse when re-weighting or imputation is used to compensate for missing data. Both systems are SAS-based. The paper describes the features of the systems and presents an overview of their methodology.
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