barq said:
That's a fair point about the reward so I've changed my mind.
Although I wonder if there are other more subtle factors at work with ebay. For example you can mutually withdraw feedback, but you only have the leverage to get the other person to withdraw if you've left them something nasty too. A tactical move might be to always leave a -ve, so if you get one back you can negotiate its withdrawal. Hardly anyone would actually do that though because it is such an obscure move and (like you say) most people aren't spiteful.
Well, if you were to implement the 'transactionally atomic' feedback idea then you would probably remove the option to withdraw - because I think feedback withdrawal is only really relevant when retaliatory feedback has occurred and both want to exercise the opportunity to 'kiss and make up'. But if dual negative feedback occurs when neither knows that the other has left negative, then they both must have been genuinely unhappy with the other's handling of the transaction. Therefore this should stay. The point with ebay is it shouldn't have anything to do with game theory - the buyer and seller aren't 'opponents' as such, they are simply people who presumably don't know or trust each other but are undertaking an agreed transaction in which a level of trust is required.
The point of feedback should be simply an accurate representation of
that transaction - nothing more.
Generally people in the world are primarily interested in their own gains - but given that those gains are optimized, they're quite happy to help others to gain. Most people will normally only do another down if they feel aggrieved. Whether that aggrieval is justified (say, if they didn't receive the item) or whether it's 'unjustified' (say, if they just didn't think they were particularly polite, or failed to respond within the 8 minutes they were online for) is irrelevant - but it's a matter of opinion what the definition of 'justified' is, doesn't it. All dual negative would mean in a transactionally atomic system is that both parties feel aggrieved. It wouldn't be able to cast any judgement on the
relative level of aggrieval or how justified the aggrieval is, but I don't think
any system could possibly hope to do that.
barq said:
The sort of system you are describing probably would work quite well - although I'm sure there must be other pitfalls we haven't thought of!
Yes I'm sure you're right.
The 'politics of perfectionism' may be one, as I've said, but that may just be me being cynical. There may be other more mundane ones.