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- Player 1 is on the horizontal and Player 2 is on the vertical. Based on the following payoff matrix, what is a Nash Equilibrium strategy profile? C R (6,5) (4,1) (1,2) M (2,9) (7,5) (6,10) (3,1) (7,2) (4,3) O (B,L) O There is no Nash Equilibrium. O (B,C) O (M,R) O (M,L) Step 2Consider a sequential-move version of a rock-paper-scissor game. Players sequentially form one of three shapes with an outstretched hand. These shapes are "rock", "paper", and "scissors". A player playing rock will beat another player playing chosen scissors, but will lose to one playing paper; a play of paper will lose to a play of scissors. If both players choose the same shape, the game is tied. Suppose the winner receives a payoff of 1 and the loser receives the payoff of -1. Both players receive zero payoff under a tie. Suppose Player 1 moves first and Player 2 moves afterwards. In this game, what is the subgame perfect Nash equilibrium payoff of Player 1? 1 00 0-1In the following games, all payoffs are listed with the row player's payoffs first and the column player's payoffs second. GAME 33 Player A Player B B1 10, 12 A1 A2 9,3 A3 8, 10 In Game 33 above, B2 B3 8,8 12, 10 7,6 11, 1 9,4 14, 3 B1 is a dominated strategy for Player B B2 is a dominated strategy for Player B B3 is a dominated strategy for Player B Player B has no dominated strategies.
- 2- Consider the following game. Player 2 Player 1 U 12, 2 | 3, 9 5, 8 4, 2 D (a) Find all the Nash equilibria, pure and mixed. (b) Suppose that the payoff of the column player u:(D, L) is reduced from 8 to 6, but all other payoffs remain the same. Again, find all the pure- and mixed-strategy Nash equilibria. (c) Compare the mixed-strategy equilibria in parts (a) and (b). Did this worsening in one of player 2's payoffs change player 2's equilibrium mixed strategy? Did it change player l's? Give some intuition.Refer to Table Left-Right-ZigZag. How many pure strategy Nash equilibria does this game have? Table: Left-Right-ZigZag Player 1 Drive left Driver right Zigzag 1) 1 2) 2 3) 3 4) 4 5) None of the above. Drive left (1,1) (-1,-1) (0,0) Player 2 Driver right (-1,-1) (1,1) (0,0) Zigzag (0,0) (0,0) (0,0)Consider the following 2-player normal form game. Player 2 Bananas Orange Player 1 Grapes 11, 3 8, 2 Apple 9, 7 6, 5 Player 1's dominant strategy is [Select ] and Player 2's dominant strategy is [ Select ) The Nash Equilibrium of this game is ( Select ) (select all that apply).
- Once again, two ice cream truck vendors, A and B, are playing a simultaneous pricing game. If only one of the vendors prices low, he gets all the customers for a payoff of 12, while the other vendor gets no customers and a payoff of zero. If both vendors price high, they each get a payoff of 6. If both price low, they each get a payoff of 5. Suppose that the above game is repeated indefinitely, and together the vendors adopt a trigger strategy such that they would start charging the low price only if the other vendor charged a low price last time. Provided that the vendors stick to their new strategy, what would be the Nash equilibrium going forward? a) Both the vendors price high b) Both the vendors price low c) Vendor A prices high, vendor B prices low d) Vendor B prices high, vendor A prices lowProblem 2. Consider the partnership-game we discussed in Lecture 3 (pages 81-87 of the textbook). Now change the setup of the game so that player 1 chooses x = [0, 4], and after observing the choice of x, player 2 chooses y ≤ [0, 4]. The payoffs are the same as before. (a) Find all SPNE (subgame perfect Nash equilibria) in pure strategies. (b) Can you find a Nash equilibrium, with player 1 choosing x = 1, that is not subgame perfect? Explain.the Consider a simultaneous-move integer game between two players: Marilyn and Noah. Each of player is required to announce a positive integer between 1 to 4. In other words, a player can announce 1, 2, 3, or 4. Two players announce their integers simultaneously. Notice that this game is different from the games we learned in class in that each player has four actions to take. The payoffs of the players in the game are specified as follows: (1) when the two announced integers are different, whoever reports the lower number pays $1 to the other player, so that the loser of the game has payoff -1 and the winner of the game has payoff 1; (2) when the two players announce the same integer, their payoffs are both O. What is Marilyn's maximin strategy? 01 02 03 O
- John and Paul are walking in the woods one day when suddenly an angry bear emerges from the underbrush. They each can do one of two things: run away or stand and fight. If one of them runs away and the other fights, then the one who ran will get away unharmed (payoff of 0) while the one who fights will be killed (payoff -200). If they both run, then the bear will chase down one of them and eat them to death but the other one will get away unharmed. Assuming they don't know which one will escape we will call this a payoff of -100 for both. If they BOTH fight, then they will successfully drive off the bear but they may be injured in the process (payoff -20). Construct a payoff matrix for this game and identify the pure strategy Nash equilibrium. (Indicate it with words not with a circle!)Consider a simultaneous game where player A has a dominant strategy and player B has two strategies (none of which is a dominant strategy). How many pure strategy Nash equilibria will this game have? A) Exactly 1 B) Exactly 2 C) Either 1 or 2 D) NoneWhich of the following is true of the normal form game below: P1. 2 X Y U Pl. 1 M D a. D is a dominated strategy for Player 1 b. U is a dominant strategy for Player 1 C. Z is a dominant strategy for Player 2 d. All of the above e. None of the above Y Z 0,4 4,5 1,5 5,3 2,0 8,3 4,2 3.7 0,1 3