Sentence examples for based on voluntary contributions from inspiring English sources

From Wikipedia to Open Source Software, Peer Production – a large-scale collaborative model of production primarily based on voluntary contributions – is emerging as an economically significant production model alongside firms, markets and governments.

The initial budget is supposed to be $500 million but it is based on voluntary contributions, which could be a financing problem in the future.

"UNICEF's income is based entirely on voluntary contributions," he said.

The database is based on voluntary monitoring by governments.

Trading at the Chicago Climate Exchange, a market based on voluntary compliance, is set to begin in June.

Household recycling is, to a large extent, based on voluntary efforts.

When based on voluntary participation, the sample of participating units can be biased.

Are they based on voluntary or involuntary membership in the group?

Our country's tax system is based on voluntary compliance.

It's based on voluntary laughing, which often induces real laughter.

Environmentalists say state figures are based on voluntary submission and not are verified.