Market Failure from Imperfect Information

Steps:

• Recall that efficient resource allocation in markets requires perfect information for rational decisions.
• Identify how lack of information causes misallocation, as consumers cannot choose optimally.
• Link to choice A, where incomplete knowledge prevents achieving Pareto efficiency.
• Conclude that this asymmetry disrupts the price mechanism's signaling role.

Why A is correct:

• Asymmetric information violates the conditions for perfect competition, leading to suboptimal resource use as per economic theory on market efficiency.

Why the others are wrong:

• B: Demerit goods (e.g., tobacco) are overconsumed due to negative externalities, not underconsumed.
• C: Public goods are underconsumed because of the free-rider problem, not overconsumed.
• D: Market economies feature private ownership; government control describes command economies.

Final answer: A