Cross Auction Model

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Cross Auction Model

Postby Akeron on 2012-06-11T01:23:00

Maybe you guys know a better forum to ask about this, but I didn't know where to start. It's not quite an ethical issue, but maybe it is.

Anyway, what do you do when you have an item, you don't know what it's worth, but you have a pool of (expert) buyers?

I call it the "Cross Auction".

To get information out of the pool, you auction off a commission for information. The pool bids the percent downwards until someone accepts the lowest rate.

When the auction completes, the accepter reveals an insurance price. This price has two values:

a) It gives the item holder insight as to how to offer the item to the rest of the crowd.
b) If the item doesn't sell, the accepter is committed to pay insurance.

If the item is sold, the accepter receives commission and walks away. If the item doesn't sell, the accepter pays what's revealed. Obviously, the accepter wants as much commission as possible, so he'll offer a high price, but not too high because he doesn't want to get stuck with the bill. On the other hand, everyone in the pool wants commission and first dibs at the item, so they're willing to bid down the rate...

...so for example, say you have an item and a pool of two. Bob thinks it's worth $100, Jim thinks it's worth $150.

Jim offers 10% and Bob offers 15% to get the same amount of cash out of the deal (let's keep it simple).

Jim then tells you it's worth $150. You go to Bob and negotiate, on average, to $125.

Bob gets the item, Jim gets ~$12.50, and you get ~$112.50 despite not knowing what the item was worth.

Seem fair?

Akeron
 
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Re: Cross Auction Model

Postby DanielLC on 2012-06-11T03:27:00

Why not just auction it normally?
Consequentialism: The belief that doing the right thing makes the world a better place.

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Re: Cross Auction Model

Postby Akeron on 2012-06-12T03:22:00

Auctions start at a bottom price, and you can suffer collusion.

You also have to account for how auctions take time. If an auction increments too slowly, people won't bid high enough to get to their marginal prices.

Akeron
 
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Re: Cross Auction Model

Postby DanielLC on 2012-06-12T04:57:00

Do a silent auction in which the highest bidder must pay the second highest bid. Then everyone bids what they think it's worth, and the winner pays what they would if they incremented it one penny at a time. That will prevent the bottom price, and it would take a minimum of time.

How does your method prevent collusion?

I don't really understand your example. Could you try to explain it better?
Consequentialism: The belief that doing the right thing makes the world a better place.

DanielLC
 
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