A gift economy is an economic system in which goods and services are given without any explicit agreement for immediate or future quid pro quo. Typically, a gift economy occurs in a culture or subculture that emphasizes social or intangible rewards for generosity: karma, honor, loyalty or other forms of gratitude. In some cases, simultaneous or recurring giving serves to circulate and redistribute valuables within a community. This can be considered a form of reciprocal altruism. Sometimes there is an implicit expectation of the return of comparable goods or services, political support, or the gift being later passed on to a third party. However, in what is considered to be in the true spirit of gift economics, many times giving is done without any expectation of reciprocity.