Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Self-organization in a simple model of adaptive agents playing 2X2 games
  with arbitrary payoff matrices   We analyze, both analytically and numerically, the self-organization of a
system of "selfish" adaptive agents playing an arbitrary iterated pairwise game
(defined by a 2X2 payoff matrix). Examples of possible games to play are: the
Prisoner's Dilemma (PD) game, the Chicken game, the Hero game, etc. The agents
have no memory, use strategies not based on direct reciprocity nor 'tags' and
are chosen at random, i.e. geographical vicinity is neglected. They can play
two possible strategies: cooperate (C) or defect (D). The players measure their
success by comparing their utilities with an estimate for the expected benefits
and update their strategy following a simple rule. Two versions of the model
are studied: 1) the deterministic version (the agents are either in definite
states C or D) and 2) the stochastic version (the agents have a probability c
of playing C). Using a general Master Equation we compute the equilibrium
states into which the system self-organizes, characterized by their average
probability of cooperation c_{eq}. Depending on the payoff matrix, we show that
c_{eq} can take five different values. We also consider the mixing of agents
using two different payoff matrices an show that any value of c_{eq} can be
reached by tunning the proportions of agents using each payoff matrix. In
particular, this can be used as a way to simulate the effect a fraction d of
"antisocial" individuals -incapable of realizing any value to cooperation- on
the cooperative regime hold by a population of neutral or "normal" agents.

1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph