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Prisoner's Dilemma
Prisoner's Dilemma
Prisoner's Dilemma
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Overview

One of the most popular models in game theory, the prisoner’s dilemma represents a compelling story with a range of takeaways. 

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Lorem ipsum dolor sit amet, consectetur adipiscing elit. Tecum optime, deinde etiam cum mediocri amico. Quae hic rei publicae vulnera inponebat, eadem ille sanabat. Quae diligentissime contra Aristonem dicuntur a Chryippo. Vide, quaeso, rectumne sit. Non enim, si malum est dolor, carere eo malo satis est ad bene vivendum. Duo Reges: constructio interrete. Semper enim ita adsumit aliquid, ut ea, quae prima dederit, non deserat. Nosti, credo, illud: Nemo pius est, qui pietatem-; Quod quidem iam fit etiam in Academia. An potest, inquit ille, quicquam esse suavius quam nihil dolere?

Expressa vero in iis aetatibus, quae iam confirmatae sunt. Quid de Pythagora? Atque hoc loco similitudines eas, quibus illi uti solent, dissimillimas proferebas. Si ad corpus pertinentibus, rationes tuas te video compensare cum istis doloribus, non memoriam corpore perceptarum voluptatum; Cur fortior sit, si illud, quod tute concedis, asperum et vix ferendum putabit? Qui enim voluptatem ipsam contemnunt, iis licet dicere se acupenserem maenae non anteponere. Quid enim necesse est, tamquam meretricem in matronarum coetum, sic voluptatem in virtutum concilium adducere? Tum Piso: Atqui, Cicero, inquit, ista studia, si ad imitandos summos viros spectant, ingeniosorum sunt; Videsne, ut haec concinant? Recte, inquit, intellegis.

Quid, si reviviscant Platonis illi et deinceps qui eorum auditores fuerunt, et tecum ita loquantur? Sic enim censent, oportunitatis esse beate vivere. Qui est in parvis malis. Dat enim intervalla et relaxat. Tum ille timide vel potius verecunde: Facio, inquit. Ut in geometria, prima si dederis, danda sunt omnia.

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Actionable Takeaways
  • Identify win-wins.

Take time to consider the possible win-wins, even with potential competitors. What ar ...

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Videamus animi partes, quarum est conspectus illustrior; Itaque hoc frequenter dici solet a vobis, non intellegere nos, quam dicat Epicurus voluptatem. Vitae autem degendae ratio maxime quidem illis placuit quieta. Quid enim de amicitia statueris utilitatis causa expetenda vides. Si qua in iis corrigere voluit, deteriora fecit. Varietates autem iniurasque fortunae facile veteres philosophorum praeceptis instituta vita superabat.

Et quidem saepe quaerimus verbum Latinum par Graeco et quod idem valeat; Non autem hoc: igitur ne illud quidem. Isto modo ne improbos quidem, si essent boni viri. Quasi ego id curem, quid ille aiat aut neget.

Duo Reges: constructio interrete. Aliena dixit in physicis nec ea ipsa, quae tibi probarentur; Quae cum essent dicta, discessimus. Et quidem, inquit, vehementer errat; Minime vero istorum quidem, inquit. Tecum optime, deinde etiam cum mediocri amico. Apud imperitos tum illa dicta sunt, aliquid etiam coronae datum; Varietates autem iniurasque fortunae facile veteres philosophorum praeceptis instituta vita superabat. Animum autem reliquis rebus ita perfecit, ut corpus; An nisi populari fama?

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Limitations

In real life, we mostly deal with repeated Prisoner's Dilemmas, where we can choose strategies to reward cooperation or punish betrayal over time. The incentives that individual decision-makers face are also altered by collective action such as rules, laws, and social punishment. 

We generally also have the opportunity to communicate within our versions of the prisoner’s dilemma, so we can negotiate and seek a level of confidence not possible in the story.

In Practice

Listen to this amazing podcast episode of golden balls.

Radiolab presents a truly gripping investigation into a game show based on the prisoner's dilemma. It really is fantastic storytelling and is highly recommended as a fascinating insight into this model.  

Global warming. 

If countries acted cooperatively, they would cut carbon emissions to help reduce global warming, possibly taking a hit to their economy as a result (let’s put renewable and green driven economies to one side for this example). However, if a country believes that another country will not take the action required then they might fear for the resulting economic advantage they will gain. The mistrust underlying a cooperative strategy, even when it's in everyone's interests, might lead to an individual strategy rather than a cooperative one.

Cigarette advertising.  

A common example cited in relation to the prisoner’s dilemma is the cigarette industry. When cigarette advertising was legalised in the US competing firms theoretically could benefit from not advertising and sharing the market. If one advertised, they would gain a dominant share, however, if both advertised they would split the market and have less profit because of advertising costs. It is of course more complex than that, particularly in terms of growing a market with advertising, but that challenge plays itself out in a range of contexts. 

Build your latticework
This model will help you to:

The Prioner's Dillema is part of game theory, and provides an understanding of how we can work together, or not. 

Use the following examples of connected and complementary models to weave the prisoner’s dilemma into your broader latticework of mental models. Alternatively, discover your own connections by exploring the category list above.

Connected models: 

  • Game theory: the prisoner’s dilemma is a model from game theory.
  • Mutually assured destruction: in terms of finding a shared, often counterintuitive, interest. 

Complementary models: 

  • Red Queen effect: in considering a potentially escalating competitive environment.
  • Divide and conquer: splitting the battle rather than fighting head on. 
  • Cialdini’s six principles of influence: to create greater connection and trust. 
  • BATNA: in the context of negotiated solutions. 
  • SCARF model: to understand when mistrust and threat dominate.
Origins & Resources

The Prisoner's Dilemma was originally posed by mathematicians Merrill Flood and Melvin Dresher while working for Rand corporation in the 1950s. It was actually named sometime later by Princeton mathematician Albert Tucker.

The model gained a boost of profile when it was featured in Robert Axelrod’s book, The Evolution of Cooperation in 1994. Now in its fifth edition, the book is the foundation for the ‘tit for tat’ strategy outlined in this model’s summary during iterative prisoner’s dilemma scenarios. Though he did note it was dependent on a number of factors. You can read more about his research in this New York Times article.

Finally, if you want to experience the concepts in the Prisoner's Dilemma, it's worth investing about 30m into this free interactive and educational game

My Notes

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