NE vs Optimal solution

Question 1

Cournot duopoly: normal form of the game, NE for a player i. Monopoly solution.

Question 2

Bertrand duopoly: normal form of the game, NE for a player i. Is the NE an optimal outcome?

Question 3

Tragedy of commons - cleaned air consumption problem: normal form of the game, NE for a player i. World’s payoff function.

Question 4

The Braess paradox