Reaction functions, differentiation question _ Game theory economics

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SUMMARY

The discussion centers on a joint project scenario involving two individuals, Robert and Stuart, where the project's value is defined by the function V(x, y) = 5(x + y) + xy. Each individual's effort incurs a cost, specifically 3(x^2) for Robert and 4(y^2) for Stuart. The participants are tasked with deducing their reaction functions and determining the Nash equilibrium, including the equilibrium payoffs. A diagram is suggested for illustration, emphasizing the need for a clear understanding of these concepts in game theory economics.

PREREQUISITES
  • Understanding of Nash equilibrium in game theory
  • Familiarity with reaction functions
  • Basic knowledge of cost functions in economics
  • Ability to interpret and create diagrams for economic models
NEXT STEPS
  • Study the derivation of reaction functions in game theory
  • Learn how to calculate Nash equilibrium in continuous strategies
  • Explore the implications of cost functions on individual strategies
  • Review graphical representations of game theory models
USEFUL FOR

This discussion is beneficial for economics students, game theorists, and anyone interested in understanding strategic decision-making in collaborative projects.

matth123
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Consider a scenario where two individuals—Robert and Stuart—are under-
taking a joint project, where the value generated from the project depends
on the effort expended by both individuals. Let x be Robert’s level of effort
and y the level of effort of Stuart; the value of the project for each individual
is given by V (x, y) = 5(x + y) + xy. Each individual receives the value from
the joint project, but incurs a cost of effort, which is given by 3 (x^2) for Robert
and 4 (y^2) for Stuart.

^2 =squared

suppose that both Robert and Stuart have complete freedom
over their effort choices (i.e. effort is a continuous strategy), which are
again chosen simultaneously. After deducing the reaction function of
each player determine what the Nash equilibrium is. Illustrate using
an appropriate diagram. What are the players’ equilibrium payoffs?
 
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