As DMUV implies that plp give up less when they gain one more extra unit of good.It enables them to maximize their gain under exchange.
英
美
- 狀態(tài) 離線(xiàn) [quote="KoBe"]i think they can exchange they can use barter system price is then replaced by relative price(CE lvl relative price；one good in term of another good)[/quote5] I agree too.
