Excessively precise economic analysis can lead to assessing everything in terms of its easily measurable melt value - the value that thieves get from stealing copper wiring from isolated houses, that vandals got from tearing down Greek temples for the lead joints holding the marble blocks together, that shortsighted timber companies get from liquidating their forests. The standard to insist on is live value. What is something worth when it's working?

Whole Earth Discipline (2009), page 277.