Having identified parthership law with the economic theory of organization, the book then goes on to argue that most of partnership law is directed at offering bundles of legal rules for different types of firms. Lawmakers should promote partnership rules that attract investors and can be expected to be efficient if they allow entrepreneurs to freely select the bundle of rules that best match their priorities. In a modern vision of partnership law, lawmakers promote economic welfare through creating non-mandatory rules that allow multiple businesses to switch to a favourable business form without significant costs. Jurisdictions plagued by falling incorporations and low levels of small and medium business activity, should abandon the mandatory and standardized framework and the "lock in" effect that it promotes, and focus on the mechanisms of legal evolution and rules that tend to mimic the market.