ABSTRACT
Chapter 7 concentrated on problems with the columns of the data matrix. Chapter 8 changes the perspective to the rows. An important consequence of nonresponse and missing data is that the remaining sample may not be representative anymore. Multiple imputation of entire blocks of variables (Section 8.1) can be useful to adjust for selective loss of cases in panel and cohort studies. Section 8.2 takes this idea a step further by appended and imputing new synthetic records to the data. This can also work for cross-sectional studies.
