Which of the following models can be estimated (following a suitable rearrangement if necessary) using ordinary least squares (OLS), where X, y, Z are variables and α, β, γ are parameters to be estimated?

(Hint: the models need to be linear in the parameters.)

yt = α + βxt + ut (2.57)

yt = eαxβ

t eut (2.58)

yt = α + βγ xt + ut (2.59)

ln(yt ) = α + β ln(xt ) + ut (2.60)

yt = α + βxt zt + ut (2.61)

AppendixLO1