clear
set mem 100M
set matsize 800
set more off

cd "C:\Users\josh\Documents\My Dropbox\Classes\Econ 174\Assignments\Practice"
log using practice.log

use practice.dta, replace

sysuse auto, replace
gen cost = 0
replace cost = cost + 1.5*weight
replace cost = cost + .25*weight if foreign==1
replace cost = cost+100 if rep78==5
replace cost = cost+50 if mpg>25
gen profit = price - cost
sum profit




xtile cost_quartile=price, nq(4)
bysort cost_quartile: egen quartile_mpg = mean(mpg)




reg price mpg
pred pred_price
twoway (scatter price mpg)(line pred_price mpg)
twoway (scatter price mpg, msymbol(plus))(line pred_price mpg, clpattern(dash) clcolor(yellow)), title(Josh's plot. w00t.)
twoway (scatter price mpg, msymbol(plus))(lfitci price mpg, clpattern(dash) clcolor(yellow)), title(Josh's plot. w00t.)