For a free market economy, having no external regulation over the prices and production of goods (in terms of amount of goods) other than those exhibited by the market itself is usually considered to be the main characteristic.
Its actually VERY likely. I may be wrong, but My research doesn't say so :D<span />
The USSR's (Soviet Union) economy was based on a communist ideology. In this political/economical situation, all property is publicly owned and each person is worked and paid according to their ability and needs. There are two classes included in this system, the working class that runs the system and the capitalist class that derive profit from employing the working class majority. In this case, the capitalist class would be the government who is given the right to decide the allocation of resources, products, and services and who they will be provided too. This was in contrast to the economy other United States because the US believed in a free market free from government control.
Having undertaken for the Glory of God, and Advancement of the Christian Faith, and the Honour of our King and Country, a voyage to plant the first colony in the northern parts of Virginia; do by these presents, solemnly and mutually in the Presence of God and one of another, covenant and combine ourselves together ...