Questions tagged [utility]

Utility, or usefulness, is the (perceived) ability of something to satisfy needs or wants.

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2answers
15k views

Cobb-Douglas and Logarithm Utility Functions

Suppose I have a consumer with a utility function $U(x,y) = x^\alpha y ^{1-\alpha} $ where $a \in (0,1)$. Suppose this consumer has wealth $w$ and the prices for $x$ and $y$ are $p_x$ and $p_y$ ...
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1answer
16k views

Finding demand function given a utility min(x,y) function

I am confused about a particular point regarding finding a demand function. All the problems in this practice set I am doing have involved applying the method of Lagrangian multipliers. But I am ...
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5answers
14k views

Help understanding Lagrangian multipliers?

I am trying to understand Lagrangian multipliers and using an example problem I found online. Problem Set Up: Consider a consumer with utility function $u(x,y) = x^{\alpha} y^{1-\alpha}$, where $\...
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2answers
12k views

Difference between 'surplus' and 'welfare'

I see these two terms used interchangeably but I have the feeling they are not exactly the same. My gut feeling tells me this: 1) Surplus is the additional aggregate utility from the existence of one ...
6
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1answer
294 views

How is labor disutility modeled in Arrow-Debreu model?

In DSGE models, utility function contains labor disutility components. But I cannot not see how labor disutility is incorporated in Arrow-Debreu-Mackenzie model.
3
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1answer
170 views

Is special case of utility function in "Intertemporal Substitution in Macroeconomics" also a special case of a Ramsey growth model utility function?

So in RBC and Ramsey-derived utility function, the following is usually the form of utility: $$u(c,l) = c^{1-\sigma}(1 + \omega(l))$$ where $\omega(l)$ is arbitrary function of $l$, labor, that ...
9
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1answer
8k views

Why is CRRA utility often used in macroeconomics DSGE model?

As title says, why is CRRA utility often used in macroeconomics DSGE model? That is, the form of $$u(c_t) = \frac{c_t^{1-\sigma}}{1-\sigma}$$ I cannot find any theoretical background around this........
14
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2answers
13k views

The relationship between the expenditure function and many others!

I dont understand the relationships between Hicksian demand, walrasian demand (marshallian), the expenditure function and the indirect utility function (including the value function V(b)). I have ...
10
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1answer
596 views

Is it possible to derive indifference curves given marshallian demand function?

In a two good world, will a marshallian demand function the likes of D(p,m) where p is the price of one good and m the income yield a utility function or ...
6
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2answers
3k views

Empirical estimates of CRRA and CARA utility

I am working on macroeconomic model and I need to calibrate it. I am looking primarily for a statistically-founded estimate for the coefficient of relative risk aversion in the CRRA utility function ...
6
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2answers
940 views

Is risk aversion bounded in CRRA utility?

For instance, Cagetti (2003) estimates ρ > 2 by targeting the median wealth of households, Gourinchas and Parker (2002) find ρ < 2 by targeting the mean consumption of households, Chetty (2006), ...
9
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2answers
1k views

When can one safely talk about decreasing marginal utility?

One thing I hear a lot is talk of decreasing marginal utility—the idea being that additional units of a good become progressively less attractive the more units of that good one has already. However, ...
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2answers
103 views

Utility and the tyranny of a minority

Follow on to this question. Using similar constraints: The constraints regarding the system I'm modeling are (and looking for a general solution to): Marginal Utility for every unit of a ...
14
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5answers
1k views

Are there Utility Monsters in Economics?

Economics, especially in the modern school is broadly influenced by the utilitarian concept of utility. More so since the labor theory of value has been broadly replaced by the theory of marginal ...

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