In his own right, Heal has contributed influential research on public economics ( marginal cost pricing for production economies with increasing returns to scale ), with natural resource economics ( particularly on economic growth with exhaustible resources ), and on petroleum.
12.
These models of socialism are not to be confused with other forms of market socialism ( e . g . the Lange model ) where publicly owned enterprises are coordinated by various degrees of economic planning, or where capital good prices are determined through marginal cost pricing.
13.
A further distinction arose between market socialists who argued that social ownership can be achieved within the context of a market economy, where worker-owned or publicly owned enterprises maximized profit, and those who argued that socially owned enterprises operate according to other criteria, like marginal cost pricing.
