In a "Free market" system, supply and demand forces affect the production and consumption decisions. There is little to no price control in such a system.
The first blank could also be "perfectly competitive" or "market efficient" system. The second blank can also be "deadweight loss". This means that producers are price takers, not price makers, and that the quantity produced and the equilibrium price of goods are determined by the free market. Usually this implies a very large number of firms producing identical products, with no collusion among them.
