This article examines the economics of healthcare rationing. We begin with an overview of the various dimensions across which healthcare rationing operates, or at least has the potential to operate, in the first place. We then describe the types of economic analyses used in healthcare rationing decision-making, with particular reference to costbenefit analysis and cost-effectiveness analysis. We also discuss healthcare rationing in practice, such as how economic analyses inform decisions regarding which services to cover, and conclude by discussing various practical and conceptual challenges that may arise with economic analyses and that span both economics and ethics.Keywords: economics, healthcare rationing, healthcare, economic analyses, decisionmaking, cost-benefit analysis, cost-effectiveness analysis, ethics Another article in this volume discussed various ethical considerations surrounding the rationing of healthcare. Any study of the rationing of goods and services, however, would be incomplete without the consideration of economic analysis. The need for rationing in the first instance arguably encapsulates the essence of economics itself. Though many definitions abound, economics is often described as the study of how individuals and agents of society allocate scarce resources among competing desires. Clearly, individuals cannot each acquire and consume all of the products and services that they want without limitation. Many, if not all, goods and services must be "rationed" in some manner. In this article, we provide a brief overview of healthcare rationing through the lens of economic analysis.At the outset, it is worth saying a bit about the term "rationing," which is often thrown around rather loosely by the media. In the broadest sense, rationing can be interpreted as any means of limiting individuals' consumption of products and services.This perspective implies that prices can ration. After all, those unwilling to pay the price for a particular good or service may be excluded from consuming or receiving it.Moreover, the first fundamental welfare theorem of economics holds that price mechanisms in competitive markets will, under a restrictive set of assumptions, perform this necessary allocation of resources in a Pareto-efficient manner-that is, it would be impossible to reallocate resources so as to make someone better off without making another worse off. Some economists, however, have uneasy feelings about referring to the free market's price mechanism as a means of rationing. Rather, "rationing" is often used as a term of art by many economists to explain any number of ways that policymakers and industry participants influence who consumes what healthcare services, excluding from this definition the distribution of goods and services via market-clearing forces. For the purposes of this article, we largely refer to rationing in this more limited context.If prices theoretically generate Pareto-efficient outcomes, one may wonder why nonprice means of rationing are even warranted in the ...