- See Emissions Reduction Currency System for community based initiatives aimed at emission reduction
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A Community Currency is often used as synonym for complementary currency, local currency, regional currency, alternative currency, auxiliary currencies, and private currencies. The debate is not easy to solve, since the words have different meanings to different people. All are currencies that have different designs and serve different purposes than conventional money.
- Community Currency describes currencies that are used by groups with a common bond, like members of a locality, or association.
- Complementary currency describes currencies that exists as a supplement to our conventional (national) money. “A complementary currency (…) is an agreement to use something other than legal tender (i.e. national money) as a medium of exchange, with the purpose to link unmet needs with otherwise unused resources” (Lietaer & Hallsmith 2006: 2).
- Alternative currency is often used, but in essence this term is deceptive in many cases, as many currencies are designed to be complementary, and not to substitute conventional currencies.
- Local currency is a Community Currency used in a locality. If this locality is larger, the word regional currency is often used.
- Private currencies emphasizes that the currency is issued by individuals, businesses or NGOs as opposed to ordinary currency issued under the authority of the government.
- Auxiliary currencies is far less applied, (see for example Douthwaite & Wagman 1999) as synonym of community currencies.
In economics, a local currency, in its common usage, is a currency not backed by a national government (and not necessarily legal tender), and intended to trade only in a small area. As a tool of fiscal localism, local moneys can raise awareness of the state of the local economy, especially among those who may be unfamiliar or uncomfortable with traditional bartering. These currencies are also referred to as community currency, and are a form of alternative currency or complementary currency. They encompass a wide range of forms, both physically and financially, and often are associated with a particular economic discourse.
Local currency is based on a local form of monetarism and mercantilism: it establishes an internal trade barrier, as the local currency cannot be used externally, and allows the area to have a different (presumably lower) interest rate than the national currency's — in the Wörgl experiment, a negative interest rate, known as demurrage. Advocacy and criticism of local currencies is based partly on general attitudes towards monetarism and mercantilism, and partly on opinions of the desirability of having internal variations in currency and trade.
Advocates[who?] of local currency in effect argue that, in certain circumstances, an entire country is not an optimum currency area, and that various regions should have different currencies. Compare with the Eurozone in Europe.
The Wörgl experiment dramatically illustrates some of the common characteristics and major benefits of local currencies.
- Local currencies tend to circulate much more rapidly than national currencies. The same amount of currency in circulation is employed more times and results in far greater overall economic activity. It produces greater benefit per unit. The higher velocity of money is a result of the negative interest rate which encourages people to spend the money more quickly.
- Local currencies enable the community to more fully utilize its existing productive resources, especially unemployed labor, which has a catalytic effect on the rest of the local economy. They are based on the premise that the community is not fully utilizing its productive capacities, because of a lack of local purchasing power. The alternative currency is utilized to increase demand, resulting in a greater exploitation of productive resources. So long as the local economy is functioning at less than full capacity, the introduction of local currency need not be inflationary, even when it results in a significant increase in total money supply and total economic activity.
- Since local currencies are only accepted within the community, their usage encourages the purchase of locally-produced and locally-available goods and services. Thus, for any given level of economic activity, more of the benefit accrues to the local community and less drains out to other parts of the country or the world. For instance, construction work undertaken with local currencies employs local labor and utilizes as far as possible local materials. The enhanced local effect becomes an incentive for the local population to accept and utilize the scrips.
- Some forms of complementary currency can promote fuller utilization of resources over a much wider geographic area and help bridge the barriers imposed by distance. The Fureai kippu system in Japan issues credits in exchange for assistance to senior citizens. Family members living far from their parents can earn credits by offering assistance to the elderly in their local community. The credits can then be transferred to their parents and redeemed by them for local assistance. Airline frequent flyer miles are a form of complementary currency that promotes customer-loyalty in exchange for free travel. The airlines offer most of the coupons for seats on less heavily sold flights where some seats normally go empty, thus providing a benefit to customers at relatively low cost to the airline.
- While most of these currencies are restricted to a small geographic area or a country, through the Internet electronic forms of complementary currency can be used to stimulate transactions on a global basis. In China, Tencent's QQ coins are a virtual form of currency that has gained wide circulation. QQ coins can be purchased for Renminbi and used to purchase virtual products and services such as ringtones and on-line video game time. They are also obtainable through on-line exchange for goods and services at about twice the Renminbi price, by which additional 'money' is being directly created. Though virtual currencies are not 'local' in the tradition sense, they do cater to the specific needs of a particular community, a virtual community. Once in circulation, they add to the total effective purchasing power of the on-line population as in the case of local currencies. The Chinese government has begun to tax the coins as they are exchanged from virtual currency to actual hard currency.
Society utilizes only a small portion of its resources and opportunities. Almost everyone has underutilized knowledge, skills and time that can be engaged productively. Most manufacturers and services have underutilized machinery or capacity. Complementary currencies are a creative means to enhance this untapped social potential.
Difficulties and criticisms 
Local currencies and the Transition Towns movement in the UK have received criticism for a failure to address the needs of the wider population, especially lower socio-economic groups. Such local currency initiatives have been more widely criticized in light of limited success stimulating new spending in local economies and as an unrealistic strategy to reduce carbon emissions. Successful Local Currencies such as the Wörgl experiment attract hostility from the Central Governments, as they reduce the bureaucracy's control over an important power centre.
Modern local currencies 
There has been a tremendous surge in the use of local currencies over the past two decades. Today there are over 2,500 different local currency systems operating in countries throughout the world.
Since 2002 there has been an upsurge in local currency experiments particularly payment voucher-based systems that are exchangeable with the national currency. Such currencies aim to raise the resilience of local economies by encouraging re-localisation of buying and food production. The drive for this change has arisen from a range of community-based initiatives and social movements. The Transition Towns movement originating in the UK has utilised local currencies for re-localisation in the face of energy descent from peak oil and climate change. Other drives include movements against Clone town and Big-box trends.
Previously, one of the most prominent systems was LETS, local exchange trading system, a trading network supported by its own internal currency. Originally started in Vancouver, Canada, there are presently more than 30 LETS systems operating in Canada and over 400 in the United Kingdom. Australia, France, New Zealand, and Switzerland have similar systems. Time Dollars, Ithaca Hours, and PEN exchange are among the most successful systems in the USA.
- Worldwide Database of Complementary Currency Systems
- Gallery of Images and Samples of Notes from Complementary Currency Systems
- short description of historical and current Local Currencies
- South America
- North America
- Regional Exchange System «Time Banking» (ROCSystem)
- United Kingdom
- Billex (credit system based on gold bills, Tomsk)
- Ven by Hub Culture
- Flash Cash
- Green dollar
- Interdependent Occupational Unit
- RGT - Red Global del Trueque
- ROCS - Robust Complementary Community Currency System
- RERS - Réseaux d'Echange Réciproque de Savoirs
- Salta Creditos
- Systèmes d’Echanges Communitares
- Thay Gerh
- Tianguis Tlaloc
See also 
- Alternative currency
- Fiscal localism
- Buy local
- Informal sector (of the economy)
- Local exchange trading system
- Complementary currency
- Collaborative finance
- Private currency
- Time-based currency
- Time Banking
- Ven (currency)
- Lietaer, Bernard, The Future of Money, Century, 2002.
- China Taxes Online Game Players KerryOnWorld, December 7, 2008
- Jamie Doward and Naomi Loomes (2008-08-17). "Lewes, the proud town that is printing its own money". London: Guardian. Retrieved 2010-08-14.
- The Undercover Economist on Local Currency
- A critique of the Lewes Pound and of local currencies more generally
- "Salt Spring Dollars". Salt Spring Island Monetary Foundation. Retrieved 2011-04-27.
- "Measures Aim To Tackle Problem Of Empty Shops". Publicnet.co.uk. 2009-04-15. Retrieved 2010-08-14.
- Clone Town Britain survey: results reveals national identity crisis The new economics foundation, 6 June 2005
- "No money? Then make your own". BBC News. 2009-09-17. Retrieved 2010-05-11.
- VENTSPILS VENTS
- Baroon Dollar An Australian local currency system.
- Kroonos.com Online social networking and time bank
- E. F. Schumacher Society large collection of information on local economies including local currencies
- History of Barter and Local Currencies large collection of information about the history of barter and local currencies
- Calderdale Green Currency 2000-2003
- Regional currencies in Germany - local competition for the euro? Deutsche Bundesbank (ed.)
- open money
- Community Exchange System (CES) global complementary currency system
- Community Currency Resources
- Complementary Community Currency Systems
- ccSyndicator Collaborative IT Committee for Complementary Currencies
- Collaborative Finance and Complementary Currencies
- Social Trade Organization
- Margrit Kennedy
- Network of German local currencies
- Online Laboratory on Complementary Currencies JAPAN
- Parallel Currency Systems in Asia
- Complementary Currency Resource Center
- Ithaca Hours An example of a local currency system functioning in the US.
- Ithaca Hours HOUR founder's site consulting with new currencies.
- Bank of International Art Money A global alternative money based on currency created by artists.
- REDI-the Regional Economic Development Initiative A local currency system being developed for Colorado.
- Infography about Community Currencies
- In We We Trust: The Prospect Of Local Currencies
- Cyclos, Open Source Complementary Currency Software
- Community Currency Magazine
- The Plenty A local currency revitalized by the publication of Small is Possible by Lyle Estill
- From Stalwart To Skeptic, Germany Rethinks EU Role on the development of microcurrencies in Germany.
- Fuzzy Local Currency Based on Social Network Analysis for Promoting Community Businesses.