Specific language impairment (SLI) is diagnosed when a child's language does not develop normally and the difficulties cannot be accounted for by generally slow development, physical abnormality of the speech apparatus, autism spectrum disorder, acquired brain damage or hearing loss.
Perfect competition. A perfectly competitive market is a hypothetical market where competition is at its greatest possible level. Neo-classical economists argued that perfect competition would produce the best possible outcomes for consumers, and society.
Competitive markets, sometimes referred to as perfectly competitive markets (or perfect competition), have three specific features. The first feature is that a competitive market consists of a large number of buyers and sellers that are small relative to the size of the overall market.