This paper is a brief report of several schemes that exist today, September 2010, in Greece and permit their members to perform transactions without any official currency. The report covers parallel currency schemes, exchange networks and several related initiatives that could be characterised as alternative exchange or non-mainstream modes of economic activity.
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"It is astonishing what foolish things one can temporarily believe if one thinks too long alone, particularly in economics". John Maynard Keynes (1936, The General Theory).