Market socialism is a type of economic system involving the public, cooperative, or social ownership of the means of production in the framework of a market economy. Market socialism differs from non-market socialism in that the market mechanism is utilized for the allocation of capital goods and the means of production.
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- The accounting prices in a socialist economy can be determined by the same process of trial and error by which prices on a competitive market are determined. […] Neither would the Central Planning Board have to solve hundreds of thousands (as Professor Hayek expects) or millions (as Professor Robbins thinks) of equations. The only "equations" which would have to be "solved" would be those of the consumers and the managers of production. These are exactly the same "equations" which are "solved" in the present economic system and the persons who do the "solving" are the same also. Consumers "solve" them by spending their income so as to get out of it the maximum total utility; and the managers of production "solve" them by finding the combination of factors that minimizes average cost and the scale of output that equalizes marginal cost and the price of the product. They "solve" them by a method of trial and error, making (or imagining) small variations at the margin, as Marshall used to say, and watching what effect those variations have either on the total utility or on the cost of production. And only a few of them have been graduated in higher mathematics. Professor Hayek and Professor Robbins themselves "solve" at least hundreds of equations daily, for instance, in buying a newspaper or in deciding to take a meal in a restaurant, and presumably they do not use determinants or Jacobians for that purpose.
- Oskar Lange, "On the Economic Theory of Socialism: Part One", The Review of Economic Studies, Vol. 4, No. 1 (Oct., 1936)