There is one prime difference between computation and economics - and for that matter, material and social sciences. Computation doesn't study humans. Wouldn't

There is one prime difference between computation and economics - and for that matter, material and social sciences. Computation doesn't study humans. Wouldn't a "unified theory" of economics (a deterministic one at that) effectively rule out free will? After all, what is "the market" if not the aggregate behaviour of all human actors in it? And if you accept free will, doesn't that conversely create a problem where the best you can do when predicting markets is correlation, not causality?