Sorry about this question,
I have been discussing with some people I am working about the need of
imputation with some of our data. What some of analysist are doing is just
to creating a category of missing values inside some variables, they argue
this is enough. It has been hard to argue with them that this is not the
best way to do. Specially in our variable income, we have about 30% of
missings.
Does anybody know about refereces discussing this approach of just
creating a category for missing values inside a variable?
Maria
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Maria da Conceicao P. Saraiva DDS, MSc, Ph.D
Departamento de Clinica Infantil e Odontologia Social e Preventiva
Faculdade de Odontologia de Ribeirao Preto-Universidade de Sao Paulo
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