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> Solution: only allow trades that are in accord with the students' submitted preferences. That is, if Alice prefers Central to Devonshire, and Bob prefers Devo
by bjl 9y ago
> Solution: only allow trades that are in accord with the students' submitted preferences. That is, if Alice prefers Central to Devonshire, and Bob prefers Devonshire to Central, then we could allow Alice and Bob to switch if their submitted rankings indicated that these moves were consistent with their desires. There would be no incentive to lie.
This is just false. You're still incentivized to place popular schools farther up than you otherwise would.
- jpfed 9y agoSo what you're saying is something like... Say you have some true preferences: Heaventy Nirvana Populonopolous Shitsville Say you decide to list Populonopolous higher than Nirvana, even though you would ultimately like Nirvana better. There isn't space at Heaventy, so you are initially assigned to Populonopolous. This won't help you get into Nirvana, because you can't trade downward on your preference list. But as long as someone else got assigned to Heaventy that would have preferred Populonopolous, you could trade with them.