gift economy
贈与経済
Anarchist economics
Basic income
Brownie points
Calculation in kind
Digital currency
Egoboo
Food swap
Free education
Giving circles
History of money
Homestay – CouchSurfing
Knowledge market
Natural economy
Pay it forward
Post-scarcity economy
Primitive communism
Solidarity economy
World currency
/suto3/google.icongift economy
image gift economy
define gift economy
wikipedia gift economy
weblio gift economy
kotobank gift economy
jisho gift economy