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arXiv:1201.3798q-fin.GN

No need for conspiracy: Self-organized cartel formation in a modified trust game

Tiago P. Peixoto, Stefan Bornholdt

Abstract

We investigate the dynamics of a trust game on a mixed population where individuals with the role of buyers are forced to play against a predetermined number of sellers, whom they choose dynamically. Agents with the role of sellers are also allowed to adapt the level of value for money of their products, based on payoff. The dynamics undergoes a transition at a specific value of the strategy update rate, above which an emergent cartel organization is observed, where sellers have similar values of below optimal value for money. This cartel organization is not due to an explicit collusion among agents; instead it arises spontaneously from the maximization of the individual payoffs. This dynamics is marked by large fluctuations and a high degree of unpredictability for most of the parameter space, and serves as a plausible qualitative explanation for observed elevated levels and fluctuations of certain commodity prices.

arXiv comments
5 pages, 5 figures [fixes a typo in the text]
Journal reference
Phys. Rev. Lett. 108, 218702 (2012)
DOI
doi:10.1103/PhysRevLett.108.218702
Subjects
q-fin.GNGeneral Finance cs.GTComputer Science and Game Theory physics.soc-phPhysics and Society

On Hacker News

Linked by 4 identifiable commenters in 9 comments across 9 threads, from Jan 2012 to Aug 2024.

Comments linking this paper, per year.

Discussed in comments9 threads

    • > Their actual mathematical conclusions are what matters... OK, what in https://arxiv.org/pdf/1201.3798 concludes cartel-like things that arise naturally can't be regulated?

      ceejayozView on HNParent context

    • Pump = buy a lot of something so the price goes up. Let's say $2 billion of it <wait for more people to buy it as a result of the price movement, and news, etc.> Dump = sell at the higher prices and match the increased demand This is whats being advocated by market analysts, and…

      EGregView on HNParent context

    • I am currently talking with Warren Mosler about implementing Unconditional Basic Income in local communities (Hi @sama! :) Cartels is the main danger with unconditional basic income. If you make sure everyone can eat, you create a moral hazard, where the insured are not…

      EGregView on HNParent context

  1. Finance is Not the Economy 1 comment
    • Things get bad even before extractors enter the picture [0]; just a disadvantage in strategy update rate will result in the formation of cartel structures. The economy will function as long as there are sufficient physical resources and human will. Finance cannot kill it. [0]…

      jsprogrammerView on HNParent context

  2. Economics Simulation 1 comment
    • Be sure to check out a similar simulation, "No need for conspiracy: Self-organizined cartel formation in a modified trust game" (0). (0) http://arxiv.org/pdf/1201.3798v3

      jsprogrammerView on HNParent context

  3. Airbnb, My $1B Lesson 1 comment
    • Pretty close to what was found here: http://arxiv.org/abs/1201.3798 It also sounds fairly intuitive when you verbalize it: the faster you can update your (presumably sound) strategy to new information, the "better" you are likely to do compared to someone who responds to…

      jsprogrammerView on HNParent context

    • Ok, well now we've gone from two ill-defined terms to a handful of ill-defined terms: "economic market or system", "prices based on competition", "private businesses", "control", "government", "market economy", "supply and demand", "little". I don't think these definitions are…

      jsprogrammerView on HNParent context

    • Well let's take this context of married women for example. The reality is that there are many men who do not have any qualms about "trying to seduce" a married woman. http://www.youtube.com/watch?v=FKfMqwSMI4U (I just had to link this :-) These men do not "respect" the…

      EGregView on HNParent context

    • I agree with your general critique, but these guys have a structural problem in their model: Their description of their model[1]: Our model is defined as follows. We consider a population of N agents, where each agent has two simultaneous roles: donator (e.g. a buyer) and…

      eternalbanView on HNParent context

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