First Differences

[jamjars]

i'm new to eviews and econometrics and i'd really appreciate some guidance.

i'm trying to test a cobb-douglas model of the form Y=E∙K^a∙L^b∙D^c , ADF and PP unit root tests show all time series to be stationary in first differences of logarithms.

does the model in logs therefore simply become:

Log ΔY = log ΔE + a log ΔK + b log ΔL + c log ΔD


Thanks

[jamjars]

Sorry, should say does the model simply become:
dlogY= dlogE + a dlogK + b dlogL + c dlogD
?