I think that today we haven’t got this form of trade, like it was at that time until we had no money. Now everyone and everywhere (although I am not sure) use the money anyway. If we can accept barter like exchange of services, something like I'm helping you here, and you give me help in the future, then barter is. I think that even in poor and not developed countries have already gone… No, I can give an example of barter which are exist now. For example, when two people sells a property. If there are two sales contracts, then it's kind of barter, because they don’t use money, they just changing their property. Flats for example.