Dear everyone,

I have a regression on GDP where I include both inflation, inflation^2 and one lag of these (I also have other control variables). Since I am looking for a convex relationship between inflation and GDP I want to look at the marginal effect of inflation on GDP but I am confused about the margins command in stata even after reading about it. Also, I have a hard time understanding how I should interpret marginal effects if I include not lagged and lagged inflation and inflation^2.

I hope it is ok to ask these questions here, all help is greatly appreciated.