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1 2 3 4 5 6 7 8 9 10 11 | # PS4.3 for Examples 4.12 and 4.13 in Section 4.5
open data4-3
ols housing 0 gnp intrate
# Model B in Example 4.12
omit intrate
# Model C in Example 4.13
ols housing 0 gnp intrate pop unemp
# Wald test for omitting pop and unemp
omit pop unemp
# add unemp back for Practice Problem 4.8
add unemp
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