Omitted Variable Bias: Wald Test in Python Videos

Last Update: March 22, 2022

My online video tutorials are hosted at YouTube channel.

For learning this concept, you can view my online video tutorials: Omitted Variable Bias: Wald Test in Python (Spyder) and Omitted Variable Bias: Wald Test in Python (Jupyter).

Videos Code

1. Package

import statsmodels.api as sm
import statsmodels.formula.api as smf

2. Data

houseprices_object = sm.datasets.get_rdataset(dataname="HousePrices",
                                              package="AER", cache=True)
houseprices = houseprices_object.data
print(houseprices.iloc[:, 0:4].head())
print(houseprices_object.__doc__)

3. Model

mlr = smf.ols(formula="price ~ lotsize + bedrooms + bathrooms",
              data=houseprices).fit()

4. Omitted Variable

waldtest = mlr.wald_test(r_matrix="bathrooms = 0", use_f=True)
print(waldtest)

Courses

My online courses are hosted at Teachable website.

For more details on this concept, you can view my Linear Regression in Python Course.