Calculate perfect competition equilibrium and firm profit analysis
Characteristics: Many buyers and sellers, homogeneous products, perfect information, free entry/exit.
Price Taking: Individual firms are price takers and face perfectly elastic demand.
Profit Maximization: Firms produce where P = MC (marginal cost).
Long-Run Equilibrium: Economic profits are zero as P = ATC (average total cost).
Market Efficiency: Perfect competition achieves allocative and productive efficiency.
Welfare Maximization: Total surplus (consumer + producer) is maximized with no deadweight loss.