# Questions tagged [economics]

For questions regarding the mathematical analysis of economic models and problems. This includes questions about the formulation or solution of models from microeconomics or macroeconomics.

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### Can quasi-concave and monotone functions level curves that are not path-connected?

For $X = \mathbb{R}^2$, does there exist a quasi-concave and monotone function $f : X \to \mathbb{R}$ that has a level curve which is not path-connected? Secondly, will every level curve necessarily ...
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### Geometry of concepts in social sciences (reference request)

When preparing for my research proposal, I read a lot of articles in economics and political science. In the social sciences one often encounters statements such as "the institutions of country X ...
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### Determine Capacity for Airline Membership Model

I am trying to determine a simple calculation for capacity for one single 747 plane -- there are 200 seats on the plane and the plane flies twice per day, every day of the year. If there was a ...
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### calculus of variations with functional being itself an optimum

The problem, I am trying to solve is based on the paper by Rochet and Vila 1994 (see literature below). In fact, it is a variant of the seminal paper of Kyle 1985 in the finance/economics literature. ...
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### Nash equilibrium in Cournot competition

QUESTION: Assume there are two types of products, labelled $l$ and $n$. Firms compete in the market by choosing which product to sell and then choosing the quantities. Let $Q_n$ and $Q_l$ denote the ...
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### Is this random generation of a distribution over the [0,1] interval measurable?

So this is basically from an economics lecture (the lecturer introduced the voting model from myerson 1993). I have this feeling that the lecturer simplified this model though, so this might not be ...
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### A car is to be purchased in monthly payments of $19500$ for five years starting at the end of three months. How much...

I was helping my comrade answer some questions when we found this question. It goes like this: A car is to be purchased in monthly payments of $19500$ for five years starting at the end of three ...
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### Game with "pure" Nash equilibrium but not SPNE

after trying to find the answer for this problem for the last few days and crawling through loads of papers and notes, I decided to ask in case someone else has a good example for me. I am trying to ...
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