* SHAZAM code downloaded from UCLA Econ 143 (CAMERON) WebSite: 
* HTML file called e143sh28.htm, and should have 
*  been downloaded as smokes.sha

sample 1 30
read(smokes.dat) age inc price packs 

* Descriptive Statistics 
stat / pcor

* Regression 1
ols inc packs / anova

* Regression 2
ols packs inc / anova

* Regression 3
ols packs inc price / anova

* Plot 1
plot inc age 
plot inc age / gnu

* Plot 2
plot price age 
plot price age / gnu

* Regression 4
ols packs age inc price / anova auxrsqr
confid age inc
confid age inc / gnu lineonly
confid inc price / gnu lineonly

test
test inc=0
test price=0
end

test
test age=0
test inc=0
end

test age=1
test inc-10*age=0
test 10*inc=age