【200币】求助 信息甄别 习题！

I was confused about the meaning of the problem yesterday. Now I know the meaning of it and I can understand why "screening by delivery date". Let (t1,p1) and (t2,p2) be the contract, (t1,p1) is for the high value buyer and (t2,p2) is for the low value buyer.The aim of the seller is to maximize the expected revenue which is πH*p1+πL*p2(we assume the seller is risk neutral). In order to sell (t1,p1) to high value buyer and (t2,p2) to low value buyer, the seller confronts four restrictions:(1)VH*δ^t1-p1>=0 (2) VL*δ^t2-p2>=0 (3)VH*δ^t1-p1>=VH*δ^t2-p2 (4)VL*δ^t2-p2>=VL*δ^
t1-p1. The first two constraints are participation constraints and the last two are incentive compatibility constraints. It's easy to proof that (1) holds if (2) and (3) holds and (1) is not binding.We can also proof (2) and (3) are binding.By (2) and (3),it's easy to find the optimal parameters which satisfy (4). I'm sure you can solve it.My calculation shows that the contract is dependent on the relation of πH and VL/VH.In each cases t1=0, p1=VH+(VL-VH)*δ^t2, p2=VL*δ^t2. But t2 is dependent on the relation of πH and VL/VH. If πH> VL/VH, t2=∞. If πH= VL/VH,t2 can be any non negative value.If πH< VL/VH, t2=0.The answer is for reference only and you don't need give the coins.

急求！急求！

顶。

The contract is not difficult to find.But I wonder why the problem is called screening by delivery date.I think the screening instrument is still the price.

not difficult,.........

rivuletwj 发表于 2013-5-6 13:02
The contract is not difficult to find.But I wonder why the problem is called screening by delivery d ...

您有没有空帮俺详细解答一下？急求。。悬赏200币。

有朋友愿意帮忙么

要是明天之前木有朋友解出来，取消悬赏，唉。。。

rivuletwj 发表于 2013-5-7 20:40
I was confused about the meaning of the problem yesterday. Now I know the meaning of it and I can un ...

这里为啥要讨论 .In each cases t1=0, ，而不是 t1=1,2,3,... t2 is dependent on the relation of πH and VL/VH. 这个关系怎么来的？谢谢！