Catallactics is the praxeological theory of the way the free market system reaches exchange ratios and prices. It aims to analyse all actions based on monetary calculation and trace the formation of prices back to the point where an agent makes his or her choices. It explains prices as they are, rather than as they `should` be. The laws of catal..... Found on http://en.wikipedia.org/wiki/Catallactics
Cat`al·lac'tics noun [ Greek ... to exchange; kata` wholly + ... to change.] The science of exchanges, a branch of political economy. Found on http://www.encyclo.co.uk/webster/C/34