observation_idnumeric
observation_id used for Module 8 conventional versus robust standard errors and robust joint tests.
Missing values: Review source documentation before recoding missing values.
outcomenumeric
outcome used for Module 8 conventional versus robust standard errors and robust joint tests.
Missing values: Review source documentation before recoding missing values.
x1numeric
x1 used for Module 8 conventional versus robust standard errors and robust joint tests.
Missing values: Review source documentation before recoding missing values.
x2numeric
x2 used for Module 8 conventional versus robust standard errors and robust joint tests.
Missing values: Review source documentation before recoding missing values.
groupnumeric
group used for Module 8 conventional versus robust standard errors and robust joint tests.
Missing values: Review source documentation before recoding missing values.
error_variancenumeric
error_variance used for Module 8 conventional versus robust standard errors and robust joint tests.
Missing values: Review source documentation before recoding missing values.
true_errornumeric
true_error used for Module 8 conventional versus robust standard errors and robust joint tests.
Missing values: Review source documentation before recoding missing values.