[quote=Diego Mamani][quote=davelj]while receiving nothing of equal value in return[/quote]
Are you kidding? You are buying an option! Anthropology is a great field, but you need to talk to an economist about things of value (they are fellow social scientists, after all).
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But the option is worthless and might, in fact, have negative value. This “call option” on marriage that you’re buying can be put back to you at any time, which means it really isn’t an option at all. Being in finance, I consulted myself on this one.