 Apart from this formal analysis of rights and measures of freedom, economic theory is not very well connected to libertarian philosophy, since economic models show that, apart from the very specific context of perfect competition with complete markets, perfect information, no externalities and no public goods, the laissez-faire allocation is typically inefficient and arbitrarily unequal. Therefore libertarian philosophers do not find much help or inspiration in economic theory, and there is little cross-fertilization in this area.