This can actually be captured with the simple recognition that opportunity cost is not entirely monetary, but rather it's about value. "Money now" has more valu

This can actually be captured with the simple recognition that opportunity cost is not entirely monetary, but rather it's about value. "Money now" has more value than "money later". This is described using a http://en.wikipedia.org/wiki/Value_function http://en.wikipedia.org/wiki/Value_function > It's easiest to imagine future earnings discounted based on how far in the future they are; I think traditionally they are discounted exponentially. It's called http://en.wikipedia.org/wiki/Temporal_discounting http://en.wikipedia.org/wiki/Temporal_discounting