This document contains two questions about socialist economic systems and markets. The first question asks about Ludwig von Mises' view that rational economic calculation is not possible in a socialist system due to the lack of private ownership and market prices. It also asks how Chinese reformers adapted ideas from the "socialist calculation debate" to incorporate some market mechanisms. The second question discusses Duncan Foley's view of socialism according to Marx, including Marx's two-stage model to communism, contributions from the Vienna Circle that influenced top-down socialist models, and the idea of socialism as a bottom-up, self-organized system with three main properties.