//1 model
regress imdbscore numc duration dirlikes gross numu castlikes numur budget movlikes ib2.colour ib1.origin ib4.rate ib1.year
estat hettest
regress imdbscore numc duration dirlikes gross numu castlikes numur budget movlikes ib2.colour ib1.origin ib4.rate ib1.year, robust

//2 model
generate lnumc = log(numc)
generate lgross = log(gross)
generate ldirlikes = log(dirlikes)
generate lnumu = log(numu)
generate lnumur = log(numur)
generate lcastlikes = log(castlikes)
generate lbudget = log(budget)
generate lmovlikes = log(movlikes)

regress imdbscore lnumc duration ldirlikes lgross lnumu lcastlikes lnumur lbudget lmovlikes ib2.colour ib1.origin ib4.rate ib1.year
estat hettest
regress imdbscore lnumc duration ldirlikes lgross lnumu lcastlikes lnumur lbudget lmovlikes ib2.colour ib1.origin ib4.rate ib1.year, robust


//3 model
regress imdbscore lnumc duration dirlikes lgross lnumu castlikes lnumur lbudget movlikes ib2.colour ib1.origin ib4.rate ib1.year
estat hettest
regress imdbscore lnumc duration dirlikes lgross lnumu castlikes lnumur lbudget movlikes ib2.colour ib1.origin ib4.rate ib1.year, robust

//4 model
generate cdirlik = "does not have likes"
replace cdirlik = "has likes" if dirlikes > 0
encode cdirlik, gen(cdirlikes)

generate ccastlik = "does not have likes"
replace ccastlik = "has likes" if castlikes > 0
encode ccastlik, gen(ccastlikes)

generate cmovlik = "does not have likes"
replace cmovlik = "has likes" if movlikes > 0
encode cmovlik, gen(cmovlikes)

regress imdbscore lnumc duration ib2.cdirlikes lgross lnumu ib2.ccastlikes lnumur lbudget ib2.cmovlikes ib2.colour ib1.origin ib4.rate ib1.year
estat hettest
regress imdbscore lnumc duration ib2.cdirlikes lgross lnumu ib2.ccastlikes lnumur lbudget ib2.cmovlikes ib2.colour ib1.origin ib4.rate ib1.year, robust