Calculate residuals of sample selection models
# S3 method for selection
residuals(object, part = "outcome",
type = "deviance", ... )object of class selection.
character string indication which residuals to extract: "outcome" for the fitted values of the outcome equation(s) or "selection" for the fitted values of the selection equation.
the type of residuals (see section ‘Details’).
The alternatives are: "deviance" (default), "pearson", and "response"
(see residuals.probit).
further arguments passed to other methods
(e.g. residuals.probit or residuals).
A numeric vector of the residuals.
The calculation of the fitted values
that are used to calculate the residuals
is described in the details section of the documentation
of fitted.selection.
Argument type is only used for binary dependent variables,
i.e. if argument part is equal "selection"
or the dependent variable of the outcome model is binary.
Hence, argument type is ignored
if argument part is equal "outcome"
and the dependent variable of the outcome model is numeric.
residuals, selection,
fitted.selection, residuals.probit,
and selection-methods.