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Games around us


                                                     Knežević Luka

                              Center for talented youth Belgrade II, Belgrade, knezevicluka08@gmail.com
                                                               terms, firm 2 will accept (Y), and profit of firm 1 will be
          1.Introduction                                       even lower. You can see that in picture 2.

          We are surrounded with different competitions and games,
          but  we  have  not  properly  introduced  in  it.  Every  single
          decision  and  move  can  be  consider  by  mathematics.
          Seemingly, logical solutions are not always the best, like i
          thought. That is the reason why I use simple example from
          everyday life.


          2.Method
                                                                                 Picture 3-Threats
          I analise new and existing examples from “Game theory“,
          which we can apply it in everyday life.              If some new firm considers entering the market, the old one
                                                               will lose their clients. They try to stop that with threats of
                                                               price war (PW). That is not credible threat because profit of
          3.Results                                            old firm is 0 in cause of price war, and in cause of not price
                                                               war  (NPW)  they  spare  the  clients.  You  can  see  that  in
           I found new conclusions about sequence games, and also   picture 3.
                           winner strategies.                  We  come  to  this  conclusion  using  Nash  equilibrium,
                                                               Prisoner's  dilemma,  backward  induction  and  credible
                                                               threats.


                                                               4.Conclusion


                                                               We  saw  that  mathematic  is  all  around  us,  and  that  we
                                                               should verify every strategy. That is only way to find  the
                                                               decision. I try to learn more about “Game Theory”, and find
                                                               more and more new examples and purpose in everyday life.
                        Picture 1-Selections rate


          In this picture you can see possible profit of firm 1 and firm   5. References
          2 after they choose high (H) or low (L) price of article. You
           can also see that chosen profit is not the biggest, but it is   1.http://gatton.uky.edu/faculty/sandford/401_f12/sequential
           safest, because firm 1 and firm 2 do not cooperate. They   .pdf
                 always choose strategy with larger profit.
                                                               2. http://bk.docsity.com/sr-video/13__Sekvencijalne_igre
                                                               3.http://www.ef.uns.ac.rs/Download/menadzment_rizikom_
                                                               master/2010-01-11_teorija_igara.pdf
                                                               4.„Теорија       игара:       елементи         и
                                                               примена“,Стојановић Божо







                     Picture 2-Selections of adverts

          If  firm  1  accept  (Y)  terms  for  commercial,  their  profit
          would be less than before, but if they do not accept (N) that
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