Mr Woodruff plumps for money as the weak link, tracing Russia's descent into a barter economy.
Local leaders could help undermine the power of the federal government by allowing the barter economy to displace the cash economy.
Ms Duong's agents, then, spontaneously organise themselves into a barter economy.
What was once a prosperous island considered a gateway to three continents, in the near term, will be reduced to just a couple of notches above a barter economy.
The fiscal wing of government has a huge incentive to move its economy away from barter.
The state forces the economy away from barter for its own fiscal purposes.
The village's economy runs on barter, though most households seem self-sufficient.
All this contributes to economic collapse, relieved mainly by a burgeoning underground economy based on barter or transactions involving precious metals, stable foreign currency or whatever else might be commonly accepted.
Others have dropped out of the money economy and rely on barter, through an exchange network that drew in as much as a third of the population at its peak earlier this year.
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Over half the Russian people today subsist outside of a money-economy system, surviving by barter and by getting whatever food they can from relatives, friends and neighbors or from what they grow on patches of land in the countryside.
For example, with too much inventory and too little cash, barter can be part of a survival strategy in a bad economy.
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