ben polak problem set solutions
wn Set Up the Profit Functions For each firm, profit \( \pi_i \) is: \[ \pi_A = (P - c) \times q_A = (a - b(q_A + q_B) - c) q_A \] \[ \pi_B = (a - b(q_A + q_B) - c) q_B \] Derive Best Response Functions To find the Nash equilibrium, differentiate each profit wi