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I did not do very much research on this and hope others add more references. Dw31415 02:52, 20 August 2007 (UTC)
- There are other definitions of economic in injection. For example, when a group or individual invests in something that is not already in the circular flow of economics, adding more in, that's called "injection", too. It is the opposite of leakage. --99.157.108.248 (talk) 18:09, 17 August 2010 (UTC)