Category Archives: Economics

TYI 39 : Can a coalition of children guarantees all being in the same class?

There is a class of children that have just finished elementary school. Now they all move from elementary school to high school and classes are reshuffled. Each child lists three friends, and the assignment of children into classes ensures that … Continue reading

Posted in Combinatorics, Economics, Mathematics to the rescue, Test your intuition | Tagged | 3 Comments

Is it Legitimate/Ethical for Google to close Google+?

Update April 2, 2019: the links below are not working anymore.  Google Plus is a nice social platform with tens of millions participants. I found it especially nice for scientific posts, e.g. by John Baez, Moshe Vardi, or about symplectic … Continue reading

Posted in Economics, Open discussion, Rationality | Tagged | 11 Comments

Fix a Horse Race…

GK (2019): Can you base world economy on horse races? Here is an old unpublished draft from 2008 that I did not complete, which was  inspired by the  economic crisis at that time. (It also felt a little over the … Continue reading

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Sergiu Hart: Two-Vote or not to Vote

  Sergiu Hart raises a very interesting idea regarding elections. Consider the Brexit referendum. Sergiu  proposes to have two rounds two weeks apart.  Every voter can vote in each, and the votes of both rounds add up! The outcomes of … Continue reading

Posted in Economics, Games | Tagged , | 14 Comments

A Historical Picture Taken by Nimrod Megiddo

Last week I took a bus from Tel Aviv to Jerusalem and I saw (from behind) a person that I immediately recognized. It was Nimrod Megiddo, from IBM Almaden, one of the very first  to relate game theory with complexity … Continue reading

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Test Your Intuition (23): How Many Women?

How many women can you find on this poster announcing the 25th Jerusalem School in Economics Theory devoted to Matching and Market Design? Please respond to the poll:

Posted in Economics, Test your intuition, Women in science | Tagged | 5 Comments

Answer to Test Your Intuition (22)

  Indeed, most people got it right! Bundling sometimes increases revenues, sometimes keeps revenues the same, and sometimes decreases revenues. In fact, this is an interesting issue which was the subject of recent research effort. So here are a few … Continue reading

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Test your intuition (22): Selling Two Items in a Bundle.

One item You have one item to sell and you need to post a price for it. There is a single potential buyer and the value of the item for the buyer is distributed according to a known probability distribution. It … Continue reading

Posted in Economics, Test your intuition | Tagged | 1 Comment

Test Your Intuition (21): Auctions

You run a single-item sealed bid auction where you sell an old camera. There are three bidders and the value of the camera for each of them is described by a certain (known) random variable: With probability 0.9 the value … Continue reading

Posted in Economics, Games, Test your intuition | Tagged , , | 4 Comments

Itai Ashlagi, Yashodhan Kanoria, and Jacob Leshno: What a Difference an Additional Man makes?

We are considering the stable marriage theorem. Suppose that there are n men and n women. If the preferences are random and men are proposing, what is the likely average women’s rank of their husbands, and what is the likely average … Continue reading

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