Economies that use resources where they are most valuable are said to be:

Allocational efficiency refers to the optimal distribution of resources to produce goods and services in such a way that maximizes the total benefit received by society. In essence, it implies that resources are being used in the most valuable or beneficial way, matching supply with demand. When an economy is allocationally efficient, it means that the right goods and services are produced in the right quantities, thus ensuring that resources are not wasted and are directed towards their most valuable uses.

This concept is foundational in economics, as it indicates that consumer preferences and needs are effectively being met, leading to maximum overall utility within the economy. This is distinct from operational efficiency, which focuses on minimizing costs and maximizing outputs within a specific process, and thus does not necessarily imply optimal resource allocation at the societal or market level. Informational efficiency pertains to the availability and dissemination of information in financial markets, while technological efficiency relates to the use of technology in production processes. Hence, the notion of using resources where they are most valuable aligns closely with the definition of allocational efficiency.