关于indifference curve的一个小问题。 - 未名空间MITBBS历史存档

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关于indifference curve的一个小问题。

关于indifference curve的一个小问题。# Economics - 经济

r*o2008-04-29 07:04

1 楼

indifference curve是指在该曲线上的任何一点用户有着相同的utlity。
那么能否假定用户选择曲线上任何一点的概率相同呢？
举个例子。10000个用户属于同一种类型(即他们的indifference curve相同)。他们消
费apple和banana。假定indifference curves的个数有限(量化)，20条。能否认为每条
indifference curve上面的用户消费概率分布均匀呢?

t*g2008-04-29 07:04

2 楼

If they are rational, why do not stay at a single point that minimizes their
cost? You statement works only if on the curve, the costs are the same.

【在 r****o 的大作中提到】

: indifference curve是指在该曲线上的任何一点用户有着相同的utlity。
: 那么能否假定用户选择曲线上任何一点的概率相同呢？
: 举个例子。10000个用户属于同一种类型(即他们的indifference curve相同)。他们消
: 费apple和banana。假定indifference curves的个数有限(量化)，20条。能否认为每条
: indifference curve上面的用户消费概率分布均匀呢?

r*o2008-04-29 07:04

3 楼

你说得有道理。
不过如果假定消费规则是先消费，再付钱的话，我的假定是不是也有道理?

their

【在 t****g 的大作中提到】

: If they are rational, why do not stay at a single point that minimizes their
: cost? You statement works only if on the curve, the costs are the same.

t*g2008-04-29 07:04

4 楼

If they are forward looking, then they can expect how much they have to pay
ex post. Taking this into consideration, it does not matter when they pay. O
f course, if you assume they do not have any konwledge of price, which is qu
ite unusual, then they would randomly pick bundles.

【在 r****o 的大作中提到】

: 你说得有道理。
: 不过如果假定消费规则是先消费，再付钱的话，我的假定是不是也有道理?
:
: their

i*e2008-04-29 07:04

5 楼

If consumers are price takers who face the same problem, have the same
preference and endowment (including information), they will make the same
choice. In your setup you want their choices to be distributed on a
indifference curve, so I guess they have the same perference. Then my guess
is you need heterogeneity in some dimension to support different choices.
If consumers play a game, and the equilibrium can be that everyone plays a
mixed strategy. By construction of mixed strategy, the consume

f*02008-04-29 07:04

6 楼

their
the utility (benefit) to the consumer is the same at any point on the curve
but that doesn't mean the cost is the same on the indifference curve.
so if a person is to maximize his utility subject to a cost (or minimize his
cost given a utility), he is likely to prefer certain points on the curve
than others, depending on how the cost function is constructed.
in other words, which he is indifferent utilitywise on the curve, he may
prefer certain points on the curve when you factor his cost

【在 t****g 的大作中提到】

: If they are forward looking, then they can expect how much they have to pay
: ex post. Taking this into consideration, it does not matter when they pay. O
: f course, if you assume they do not have any konwledge of price, which is qu
: ite unusual, then they would randomly pick bundles.