 Market socialism can take many different forms. John Roemer has developed, and serially refined, a particular variant referred to here as “coupon socialism” (1994a, 1994b, 1996). Coupon socialism is an example of a kind of market socialism sometimes called “shareholder socialism”; that is, a type of economic model which combines a stock market with public ownership of firms (Corneo 2017: 184–197). Sceptics might characterise the result as “capitalism without capitalists”, but Roemer defends it as a feasible and desirable attempt to combine: efficient market mechanisms; some state planning over broad investment priorities; an egalitarian distribution of property rights; and an egalitarian distribution of profits.