High Quality Content by WIKIPEDIA articles! In economics, technical-efficiency is the effectiveness with which a given set of inputs is used to produce an output. IF a firm is producing the maximum output it can, given the resources it employs, such as labor and machinery, and the best technology available, it is said to be technically-efficient. X-inefficiency occurs when technical-efficiency is not being achieved due to a lack of competitive pressure. THe concepts of x-inefficiency and x-efficiency were introduced by Harvey Leibenstein. IN the theory of perfect competition, there will in general be no x-inefficiency because if any firm is less efficient than the others it will not make sufficient profits to stay in business in the long term. HOwever, with other market forms such as monopoly it may be possible for x-inefficiency to persist, because the lack of competition makes it possible to use inefficient production techniques and still stay in business.