A Mathematician, a Physicist, an Engineer, a Computer Scientist, and an Economist Attempt to Split a Check

A mathematician, a physicist, an engineer, a computer scientist, and an economist attempt to split a check.  Nobody looks good, but perhaps the economist gets the worst of this story:

Economist: Let’s each write down the amount we’re willing to put in, then auction off the remainder at some point on the contract curve.

Physicist: Huh?

Mathematician: Like most economics, that’s just gibberish with the word “auction” in it.