use "C:\Users\Asus\Documents\AUCA\Teaching\2021-2022\Applied Econometrics\Seminars\Seminar 4\reg01.dta" 
gen logincome=log(income)
regress logincome educ jobexp race
gen jobexpsqrd=jobexp^2
regress income educ jobexp jobexpsqrd race
gen jobexprace=jobexp*race
reg income educ jobexp jobexprace race
gen incomenew=income*1000
reg incomenew educ jobexp race
reg income educ jobexp race
gen logjobexp=log(jobexp)
regress income educ jobexp jobexpsqrd race
regress income educ logjobexp race