Defining Pareto Optimum Efficiency

The statement, "no one can be made better off without making someone worse off," is the fundamental definition of Pareto Optimum.

Understanding Pareto Optimum

In economics, a situation is considered Pareto Optimum (or Pareto Efficient) when resources are allocated in such a way that it's impossible to improve one person's situation without making another person's situation worse.

• This concept signifies a state of maximum economic efficiency from a specific viewpoint.
• It implies that any further beneficial change for one party would require taking something away from another party.

Evaluating the Options

• Pareto Optimum: Directly matches the definition provided in the question. It describes a state where efficiency is maximized according to this criterion.
• Nash Equilibrium: This concept from game theory refers to a stable state where no player can achieve a better outcome by unilaterally changing their strategy. It doesn't necessarily imply maximal resource allocation efficiency in the sense described.
• Low-level Equilibrium Trap: This term relates to development economics, describing a situation where an economy remains stuck at a low standard of living due to self-reinforcing mechanisms. It's unrelated to the efficiency definition given.
• Cournot’s Equilibrium: This applies to oligopoly markets where firms compete on the quantity of output. It determines a specific market outcome but isn't synonymous with the general welfare condition stated.

Therefore, the statement accurately describes the condition for achieving a Pareto Optimum.