Examlex
The following are all sampling strategies in field research except
Barter
The direct exchange of one good or service for another good or service.
Barter
A system of exchange where goods or services are traded directly for other goods or services without the use of money.
Exchange of Goods
The act of giving one item of value in return for another, especially in a commercial context.
Market Failures
Occur when the market does not allocate resources efficiently on its own, leading to a loss of economic welfare.
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