Allocative efficiency increases since subsidies reduce firms’ average total costs allowing them to produce at lower prices closer to marginal cost pricing.

Allocative efficiency decreases as subsidies encourage overproduction relative to the socially optimal level of output where marginal cost equals marginal benefit.

There is no change in allocative efficiency because subsidies only affect production decisions without altering consumption preferences or perceived value of goods by consumers.

Subsidies improve allocative efficiency by eliminating excess capacity and moving production closer towards minimum efficient scale operations for each firm within the industry.