If neither player in a game has a dominant strategy in a game, then
there is no equilibrium outcome for the game
. – It is not true that both players will always have at least one dominant strategy.
What happens if there is no dominant strategy?
A dominant strategy is a strategy which results in the best payoff for a player no matter what the other firm does but a Nash equilibrium represents a strategy which maximizes payoff given what the other player would do. … A
game
has a Nash equilibrium even if there is no dominant strategy (see example below).
Does either player have a dominant strategy explain?
(a) Does either player have a dominant strategy? … Answer:
Neither player has a dominant strategy
. For example, if Shelia plays A and Thomas plays D then Shelia’s payoff is 14. But if Shelia plays B and Thomas plays C, then Sheilas’s payoff is 15.
Is Nash equilibrium always a dominant strategy?
A Nash equilibrium is
always a dominant strategy equilibrium
. If a player’s optimal strategy depends on the behavior of rival players, then that player must have a dominant strategy. The prisoners’ dilemma provides an explanation for price wars among oligopolists.
Can a firm not have a dominant strategy?
2d A game is a prisoner’s dilemma if: each player has a dominant strategy, and when both players choose their dominant strategy, each gets a lower payoff than if each had chosen their dominated strategy. …
No, Firm 1 does not have a dominant strategy in this game
.
What is player A’s dominant strategy?
“Dominant strategy” is a term in game theory that refers
to the optimal option for a player among all the competitive strategy set
, no matter how that player’s opponents may play, and the opposite strategy is called “inferior strategy.”
What is a strictly dominated strategy?
A strategy is strictly (or strongly) dominated
if it leads to worse outcomes than alternative strategies
. A strategy is weakly dominated if it leads to equal or worse outcomes than alternative strategies.
What is a weakly dominated strategy?
-a weakly dominant strategy is that
strategy that provides at least the same utility for all the other player’s strategies, and strictly greater for some strategy
. … The elimination of dominated strategies is commonly used to simplify the analysis of any game.
Does Rowes have a dominant strategy?
(a) 1 point: • One point is earned for stating that Breadbasket has a dominant strategy of setting a low price but Quicklunch
does not have a dominant strategy
.
What is the difference between dominant strategy and Nash equilibrium?
According to game theory, the dominant strategy is the
optimal move
for an individual regardless of how other players act. A Nash equilibrium describes the optimal state of the game where both players make optimal moves but now consider the moves of their opponent.
How do you tell if there is a Nash equilibrium?
To find the Nash equilibria,
we examine each action profile in turn
. Neither player can increase her payoff by choosing an action different from her current one. Thus this action profile is a Nash equilibrium. By choosing A rather than I, player 1 obtains a payoff of 1 rather than 0, given player 2’s action.
What is the Nash equilibrium strategy?
Nash equilibrium is a
concept within game theory where the optimal outcome of a game is where there is no incentive to deviate from the initial strategy
. … Overall, an individual can receive no incremental benefit from changing actions, assuming other players remain constant in their strategies.
Can there be more than one dominant strategy?
Can a player have two strictly dominant strategies? Give an example or prove that this is
impossible
. No. If si and si were both strictly dominant, si = si, then you would have ui(si,s−i) > ui(si,s−i) > ui(si,s−i) for all s−i, which is impossible.
What is Firm B’s best strategy?
Firm B’s dominant strategy is
to produce low levels of output
, but Firm A does not have a dominant strategy.
How do you find a dominated strategy?
A strategy is dominated
if there always exist a course of action which results in higher payoff no
matter what the opponent does. Identifying strategic dominance in a game is important in identifying its Nash equilibrium, an outcome which no player would want to change.
