cragg_donald {cragg} | R Documentation |
Calculate the Cragg-Donald statistic for a given model.
cragg_donald(X, D, Z, data = data.frame())
X |
(formula). A one-sided formula of control variables. |
D |
(formula). A one-sided formula of endogenous variables (treatments) |
Z |
(formula). A one-sided formula of instruments |
data |
(dataframe). An optional dataframe, list, or environment containing the variables used in the model. As with many of the base R functions, if the variables are not found here, they may be searched for in the environment cragg_donald() was called. |
(cd_test) results object of class "cd_test"
#Obtain the Cragg-Donald statistic for a model that instruments #Sepal Width on Petal Length, Petal Width, and Species, while controlling #for Sepal.Length (a toy example). cragg_donald(X=~Sepal.Length, D=~Sepal.Width, Z=~Petal.Length + Petal.Width + Species, data = iris)