I'm right back at it again. Just like I've always said, you're too cool for school. You ain't here to make no friends. I'm right back at it again. Just like I have always said, you're too cool for school. You ain't here to make no friends. So here I am, I'm right back at it again. You ain't here to make no friends.
Economic efficiency is, roughly speaking, a situation in which nothing can be improved without something else being hurt. Depending on the context, it is usually one of the following two related concepts: 1  Allocative or Pareto efficiency: any changes made to assist one person would harm another.
Not to be confused with effectiveness and efficacy. For other uses, see efficiency (disambiguation). Efficiency is the (often measurable) ability to avoid wasting materials, energy, efforts, money, and time in doing something or in producing a desired result. In a more general sense, it is the ability to do things well, successfully, and without waste.