ch9

jhu-aap-econ · Oct 29, 2024 · 671cc2b · 671cc2b
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diff --git a/README.md b/README.md
@@ -51,6 +51,11 @@ Each notebook corresponds to a chapter from the source material. Click on the "O
    <img src="https://colab.research.google.com/assets/colab-badge.svg" alt="Open In Colab"/>
    </a>
 
+8. **Ch9. Specification and Data Issues**
+   <a target="_blank" href="https://colab.research.google.com/github/alanlujan91/merino/blob/main/notebooks/Ch9.%20Specification%20and%20Data%20Issues.ipynb">
+   <img src="https://colab.research.google.com/assets/colab-badge.svg" alt="Open In Colab"/>
+   </a>
+
 ## How to Use
 
 1. Click on the "Open in Colab" badge next to the notebook you want to explore.

diff --git a/markdown/Ch7. MRA - Qualitative Regressors.md b/markdown/Ch7. MRA - Qualitative Regressors.md
@@ -20,11 +20,11 @@ jupyter:
 ```
 
 ```python
+import numpy as np  # noqa
 import pandas as pd
 import statsmodels.api as sm
 import statsmodels.formula.api as smf
 import wooldridge as wool
-import numpy as np
 ```
 
 ## 7.1 Linear Regression with Dummy Variables as Regressors