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.
A perfectly competitive market has following assumptions: It means no single buyer or seller can affect the price. If a firm enters into the market or exit the market, there will be no effect on the supply. Similarly if a buyer enters into the market or exit from the market, demand will not be affected.