 Philosophers have articulated other principles they think a desert-sensitive theory of value should entail, and have proposed yet more complicated “contribution formulas” as parts of theories of that sort. For example, Eric Carlson holds that if you have a bunch of people with the same desert level, and you “have a fixed amount of welfare to distribute between them” (really, in each world that you can “make actual” the sum of their welfare levels is the same), then the world in which they all receive the same welfare level should have the greatest intrinsic value. Equal levels of welfare are best, when everyone is equally deserving. The theory we just described is incompatible with this idea. (For Carlson’s theory, which does entail this principle, see Carlson 1997. Feldman 1995a articulated many ideas about how intrinsic values should be adjusted to take desert into account. Persson 1997 distinguished the idea of desert as a multiplier (he called it the “merit idea”) from the idea that what matters is the fit between desert and receipt; he sees both ideas at work in Feldman’s paper. Other constraints people have wanted to place on a desert-sensitive theory may be found in Carlson 1997, Arrhenius 2006, and Skow 2012.) 