Michael Linton originated the term "local exchange trading system" (LETS) in 1983 and for a time ran the Comox Valley LETSystems in Courtenay, British Columbia.[22] LETS networks use interest-free local credit so direct swaps do not need to be made. For instance, a member may earn credit by doing childcare for one person and spend it later on carpentry with another person in the same network. In LETS, unlike other local currencies, no scrip is issued, but rather transactions are recorded in a central location open to all members. As credit is issued by the network members, for the benefit of the members themselves, LETS are considered mutual credit systems.
1.Jump up ^ O'Sullivan, Arthur; Steven M. Sheffrin (2003). Economics: Principles in Action. Pearson Prentice Hall. p. 243. ISBN 0-13-063085-3. 2.^ Jump up to: a b Graeber, David (2011). Debt: the first 5,000 years. New York: Melville House. pp. 21–41. 3.Jump up ^ Humphrey, Caroline (1985). "Barter and Economic Disintegration". Man 20 (1): 49. 4.^ Jump up to: a b Humphrey, Caroline (1985). "Barter and Economic Disintegration". Man 20 (1): 48. 5.Jump up ^ Humphrey, Carolyn and Stephen Hugh-Jones (ed.). Barter, Exchange and Value: An Anthropological Approach. Cambridge: Cambridge University Press. p. 3. 6.Jump up ^ Graeber, David (2001). Toward an Anthropological Theory of Value: The False Coin of our Dreams. New York: Palgrave. p. 154. 7.Jump up ^ Graeber, David (2011). Debt: the first 5,000 years. New York: Melville House. pp. 40–41. 8.Jump up ^ Graeber, David (2001). Toward an Anthropological Theory of Value: The false coin of our own dreams. New York: Palgrave. pp. 153–4. 9.Jump up ^ Graeber, David (2011). Debt: The First 5,000 Years. Brooklyn, NY: Melville House. pp. 94–102. 10.Jump up ^ Robert E. Wright and Vincenzo Quadrini. Money and Banking.Chapter 3, Section 1: Of Love, Money, and Transactional Efficiency Accessed June 29, 2012 11.Jump up ^ Humphrey, Caroline (1985). "Barter and Economic Disintegration". Man 20 (1): 66–7. 12.Jump up ^ Plattner, Stuart (1989). Plattner, Stuart, ed. Economic Anthropology. Stanford, CA: Stanford University Press. p. 179. 13.Jump up ^ M. Bloch, J. Parry (1989). Money and the Morality of Exchange. Cambridge: Cambridge University Press. p. 10. 14.Jump up ^ Humphrey, Caroline (1985). "Barter and Economic Disintegration". Man 20 (1): 52. 15.Jump up ^ Polanyi, Karl (1957). Polanyi, Karl et al, ed. Trade and Market in Early Empires. Glencoe, Illinois: The Free Press. p. 14. 16.Jump up ^ Harrison, John (1969). Quest for the New Moral World: Robert Owen and the Owenites in Britain and America. New York: Charles Scibners Sons. p. 72. 17.Jump up ^ Harrison, John (1969). Quest for the New Moral World: Robert Owen and the Owenites in Britain and America. New York: Charles Scibners Sons. p. 73. 18.Jump up ^ Harrison, John (1969). Quest for the New Moral World: Robert Owen and the Owenites in Britain and America. New York: Charles Scibners Sons. pp. 202–4. 19.Jump up ^ Tadayuki Tsushima, Understanding “Labor Certificates” on the Basis of the Theory of Value, 1956 20.Jump up ^ Homenatge A Catalunya II (Motion Picture). Spain, Catalonia: IN3, Universita Oberta de Catalunya, Creative Commons Licence. 2010. Retrieved January–2011. "A documentary, a research, a story of stories about the construction of a sustainable, solidarity economics and decentralized weaving nets that overcome the individualization and the hierarchical division of the work, 2011." 21.Jump up ^ Barcelona's barter markets (from faircompanies.com. Accessed 2009-06-29.) 22.Jump up ^ "What is LETS?". AshevilleLETS. Retrieved December 9, 2008. 23.Jump up ^ TIMES, nov. 2009 24.Jump up ^ David M. Gross, ed. (2008). We Won’t Pay: A Tax Resistance Reader. pp. 437–440. 25.Jump up ^ Tax Topics - Topic 420 Bartering Income. United States Internal Revenue Service
Since the 1830s, barter in some western market economies has been aided by exchanges which use alternative currencies based on the labour theory of value, and which are intended to prevent profit-taking by intermediaries. Examples include the Owenite socialists, the Cincinnati Time store, and more recently[when?] Ithaca HOURS (time banking) and the LETS system.
Trade did occur in non-monetary societies, but not among fellow villagers. Instead, it was used almost exclusively with strangers, or even enemies, where it was often accompanied by complex rituals involving trade, dance, feasting, mock fighting, or sex—and sometimes all of them intertwined. Take the indigenous Gunwinggu people of Australia, as observed by the anthropologist Ronald Berndt in the 1940s:
He would have heard of channels and sandbanks, of natural features of the land useful for sea-marks, of villages and tribes and modes of barter and precautions to take: with the instructive tales about native chiefs dyed more or less blue, whose character for greediness, ferocity, or amiability must have been expounded to him with that capacity for vivid language which seems joined naturally to the shadiness of moral character and recklessness of disposition.
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Adam Smith, the father of modern economics, sought to demonstrate that markets (and economies) pre-existed the state, and hence should be free of government regulation. He argued (against conventional wisdom) that money was not the creation of governments. Markets emerged, in his view, out of the division of labour, by which individuals began to specialize in specific crafts and hence had to depend on others for subsistence goods. These goods were first exchanged by barter. Specialization depended on trade, but was hindered by the "double coincidence of wants" which barter requires, i.e., for the exchange to occur, each participant must want what the other has. To complete this hypothetical history, craftsmen would stockpile one particular good, be it salt or metal, that they thought no one would refuse. This is the origin of money according to Smith. Money, as a universally desired medium of exchange, allows each half of the transaction to be separated.[2] 

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In his analysis of barter between coastal and inland villages in the Trobriand Islands, Keith Hart highlighted the difference between highly ceremonial gift exchange between community leaders, and the barter that occurs between individual households. The haggling that takes place between strangers is possible because of the larger temporary political order established by the gift exchanges of leaders. From this he concludes that barter is "an atomized interaction predicated upon the presence of society" (i.e. that social order established by gift exchange), and not typical between complete strangers.[13]