Elaborate barter systems often crop up in the wake of the collapse of national economies: most recently in Russia in the ’90s and in Argentina around 2002, when rubles in the first case, and dollars in the second, effectively disappeared.26 Occasionally one can even find some kind of currency beginning to develop: for instance, in POW camps and many prisons, inmates have indeed been known to use cigarettes as a kind of currency, much to the delight and excitement of professional economists.
