Folks like melveyr and myself point out that it's a natural result of a monetized economy, within which economic errors, financial shocks, or malinve. Others seem to think differently... here's one of a few interesting artices I've found on the nature of a recession and the natural will and difficulty to bartar in such times in the modern economy.
http://marginalrevolution.com/marginalr ... cfq8B.dpuf
If proof were needed that overproduction is not the cause of the depression, barter is the proof – or some of the proof. It shows goods not over-produced but dead-locked for want of a circulating transfer-belt called “money.”? Many a dealer sits down in puzzled exasperation, as he sees about him a market wanting his goods, and well stocked with other goods which he wants and with able-bodied and willing workers, but without work and therefore without buying power. Says A, “I could use some of B’s goods; but I have no cash to pay for them until someone with cash walks in here!”? Says B, “I could buy some of C’s goods, but I’ve no cash to do it with till someone with cash walks in here.”? Says the job hunter, “I’d gladly take my wages in trade if I could work them out with A and B and C who among them sell the entire range of what my family must eat and wear and burn for fuel – but neither A nor B nor C has need of me – much less could the three of them divide me up.”? Then D comes on the scene, and says, “I could use that man! – if he’d really take his pay in trade; but he says he can’t play a trombone and that’s all I’ve got for him.”? “Very well,”? cries Chic or Marie, “A’s boy is looking for a trombone and that solves the whole problem, and solves it without the use of a dollar. In the real life of the twentieth century, the handicaps to barter on a large scale are practically insurmountable…. Therefore Chic or somebody organizes an Exchange Association… in the real life of this depression, and culminating apparently in 1933, precisely what I have just described has been taking place.
