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.
The firms produce the same product for the same price. perfect competition. sometimes called pure competition, is the simplest market structure because a large number of firms produce basically the same product at the same price, restricting the decisions and influence they have on the market.