Help with interpreting log in regression

Good morning,
I am new to this forum and would like some help with the interpretation of the following regression. I hope I am in the right place.

lnWaste = +A(lnGDP) +B(lnGDP)2

I have found coefficients for lnGDP= -1.85 and for (lnGDP)2=0.1
Now I am trying to give an interpretation of what would happen to Waste if GDP increases by x%.
I usually report the elasticity easily but I am not sure how to work with this since I have two different values that I should take into account when differentiating. I hope this makes sense and someone can give me a hand.

Many thanks to all!


Well-Known Member
Hi Sara,

Did you try:
1. extracting Waste from the formula (power regression)
2. changing GDP predictor and see how Waste is changed? (try multiply GDP)
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