Corporate valuation increased in 21 of the 38 states studied following medical marijuana legalization. Gross profit per employee and gross sales per employee each rose by more than $8,000. Patent output climbed 10.4% across those states, and the economic value of those patents — not just the count, but how much they were actually worth — rose 22%, as states became better at both retaining their existing inventors and pulling in new ones from states that hadn’t legalized.