R&D, stock of knowledge and CES functions

Hello everyone,

I’m currently implementing in my model a sector that uses, on top of capital/labor/energy/material inputs, a technical progress input to change the design of the good. I see that in the litterature, most models (Romer and co) use a Cobb Douglas function for the final good with the stock of knowledge and other intermediate inputs.

I wondered if I could do the same but with a CES function, assuming that the stock of knowledge and other inputs are imperfect complements : you cannot produce the specific good with a specific new design coming from innovation without KLEM or innovation.

The technical progress/innovation intermediate input comes from an innovator.

Thank you

I don’t see an immediate reason why that should not be feasible.