Name: 理想のオークション - Numberphile (The Ideal Auction - Numberphile)
Uploaded: 2021-01-14T10:15:59.000Z
Duration: 14 min 18 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

so in auction is a method of price discovery, a method of figuring out what someone's gonna pay for an item and who's going to get it.

So if I've got a Coca Cola to sell and I've got six people who want it, who's going to get that Coca Cola?

And any sort of mechanism in which the potential buyers expressed desire in some wake and then that turns into both a price and determination of who gets it.

The Latin root of auction came from to increase, and you're kind of standard.

We're gonna let competition push the price up and until one person is left standing.

So probably the most important factor is price discovery.

You have paintings for sale, and no one really knows.

You know what the value those paintings is.

Pretty much determined by what people are willing to pay for them would be a really a frustrating thing if when I went to buy shampoo in the grocery store, I had to go bid on it and wait and let other people bid all the while waiting for my shampoo.

And so we typically wouldn't run auctions when we have enough of the supply that we're pretty sure we can sell the everybody.

And we have a good enough sense of the price of the value that there's no need to run through a price discovery method.

But we don't know the price of the Mona Lisa, in essence, that they can make more shampoo it roughly the same cost so that we can have as much shampoo is we need.

If we need 10% more shampoo, that's not a problem for the shampoo manufacturer.

So as a result, while there could be a shortage and you see this often, if there's a storm comic people come in, they buy all the stuff off the shelves.

That would be a time where there's gonna be people who go without a result.

You might think about holding an auction.

Now, let me say most states have laws that prevent sellers from holding an auction in that circumstance that they're not allowed to take advantage of people who are, in some sense desperate you know otherwise you can go if you need 10 bottles of shampoo would go by 10 bottles of shampoo.

Probably the most popular auction is called an aural ascending auction.

You see it in movies where somebody tugs their ear and they buy a Ming vase by accident.

There's a minimum bid, perhaps, or a low bid that the auctioneer starts with.

And then they start with this chatter going.

And the price rises until at some point there's only one bidder who's willing to bid at that price.

And that is no one is willing to go up anymore.

Sometimes called the English auction is common in England, but it's actually common around the world as a method of auctioning.

I believe it was used as far back in time is the Babylonian Sze.

This auction has been around a really long time sealed bid auction in this case, bidder say, Here is my head.

Those envelopes are all open simultaneously, the high bidder wins and they pay their bid.

Sometimes that's called a pay as bid auction, sometimes usually with the word seal bid.

And sometimes it's called a first price, meaning the high bidder paid the high bit.

Typically, it's governments that you sealed bids much more common to be government.

Sometimes large corporations will also use sealed bid.

The beauty of a sealed bid relative to an English auction is that it's hard for the auctioneer themselves to cheat.

So our big concern with the government holding an auction is that the government officials might collude with one of the bidders.

If the government official did that, there would be a paper trail that allows it to be audited.

When I was at the Department of Justice, a bitter submitted a bid that contained copies of all their rivals bids in the same envelope.

And so we were able to show really easily that the bidders themselves were colluding with each other.

The bidder had inadvertently submitted a copy of the rivals bids which they shouldn't have been able to see.

Dutch auction, sometimes called a tulip auction is well known for being used in the Dutch tulip auctions.

It's an aural auction that is, it's used with an auctioneer and all the bidders assembled together, and it starts high and then runs low.

If we're selling, tulips will say, Is anybody willing to pay $10,000 where we're pretty sure that no one's willing to pay $10,000 the prices successively lowered until someone says I'll take it?

And at that moment, it sells to that bidder at the price that they bid.

From a theoretical standpoint, this auction is actually identical to the sealed bid auction.

And if you think about it when you submit a bid in a sealed bid auction, you're thinking, well, the other bidders will bid whatever they bid, and I win.

If I'm the highest Now, imagine yourself in the position of bidding in the Dutch auction.

You're saying I have to choose a bid, and when the price reaches that bid, that's the moment I'm going to jump in.

I'm thinking, well, the other one's bid higher than that, in which case I'll lose.

But if I put in a higher bid, I might win, but I pay Maur.

It's exactly the same thought process that you face with the sealed bid auction.

So, in fact, theoretically the same bidder should win at the same price.

Whether I hold a Dutch or a sealed bid when we actually run experiments, it's not true.

People jump a little bit earlier in the Dutch auction, that is, they bid a little bit higher, maybe because of the excitement of it.

Just the time while they wait is making them nervous or something.

They're less rational, we don't know, but they bid a little bit higher in the Dutch auction than they do in the seal bit.

Second price sealed bid auction are also known as the Vickery auction, after William Vickery, who won the Nobel Prize for its discovery along with some other things about auctions.

He did this work in 1961 so the way victories auction works is it works just like the sealed bid that we described before.

But now when we open the envelopes, the high bidder will win.

But they pay the second highest bid, not the highest bids.

It's the minimum they could have bid and still want is one way to think about it.

Had they known what all the other bids were, This is what they would have wanted to bid.

Is that maybe plus a penny toe guarantee?

If I am paying the second highest price, I'll will it.

I'll be willing to bid a lot more aggressively if you've been an eBay.

You submit a bid, let's say, for $100 when another bid comes in at 40 they then turn around and give it to you at 40 plus the increment, which might be 45.

If that bitter comes back with 60 will then give it again to you for 60 plus the increment.

That process continues unless someone actually bids higher than you.

So what that's implemented is a second price auction.

You still pay the next highest bid, plus a little bit.

And the smaller that little bit is, the more it looks exactly like the victory, which is paying the second highest price.

It's easy to cheat a second price auction because you actually see what people are willing to pay.

So you could just go to the high bidder and say, Oh, the second highest bid was just a penny below your bid.

You're gonna have to pay approximately your bit.

Well, they've revealed it, and that can be dangerous.

The upside of it is that it actually gets this competitive pressure of that aural auction, which has, you know, it's a great auction, forgetting for extracting lots of money out of people, but without requiring them to be in the same room or even to be humans.

The big search auctions one by Google and being they are second price auctions.

But what you pay is just what it would take to hold your slot.

Let me, let's let's just think about the first price he'll bid or the pay is bid and the victory auction.

When I'm thinking about what I should bid to a first price, he'll bid.

I say, Well, I'm gonna pay my bid, so let's say my value is 100 I think about submitting a bit of $75.

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理想のオークション - Numberphile (The Ideal Auction - Numberphile)

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