GU_normalization: Gardeazabal and Ugidos normalization of factor variables
Description
The function performs the normalization of the factor variables
proposed by Gardeazabal and Ugidos (2004, GU) to estimate detailed decompositions
that do not depend on the chosen reference levels of the factor variables.
Usage
GU_normalization(formula, data, weights, group)
Value
a list containing the adjusted formula, adjusted data, adjusted coefficient names,
and the normalized regressors for prediction and the
Arguments
formula
an object of class "formula". See lm for further details.
data
a data frame containing the variables in the model.
weights
numeric vector of non-negative observation weights, hence of same length as dep_var.
group
name of the a binary variable (numeric or factor) identifying the two groups that will be compared.
References
Gardeazabal, Javier, and Arantza Ugidos. 2004. "More on identification in detailed wage decompositions."
Review of Economics and Statistics 86(4): 1034-1036.
data("men8305")
mod1 <- log(wage) ~ union + married + nonwhite + education + experience
normalized_data <- GU_normalization(
formula = mod1,
data = men8305,
weights = weights,
group = year
)