I did estimate high cross-price elasticity effects between free range and cage eggs. If you add other free range/humane products to the spreadsheet then you will have to estimate CPE effects with this sort of thing in mind. The model has capacity for it, just add more rows and columns in the matrices and interpolate the formulas. You can also include different plant products if you like, but I think you are really just adding needless complexity and noise at that point, those differences seem small and nearly impossible to estimate. I lumped all plant products together with average emissions and the assumption of equal-or-nonexistent elasticity effects.
I did estimate high cross-price elasticity effects between free range and cage eggs. If you add other free range/humane products to the spreadsheet then you will have to estimate CPE effects with this sort of thing in mind. The model has capacity for it, just add more rows and columns in the matrices and interpolate the formulas. You can also include different plant products if you like, but I think you are really just adding needless complexity and noise at that point, those differences seem small and nearly impossible to estimate. I lumped all plant products together with average emissions and the assumption of equal-or-nonexistent elasticity effects.