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.
Advertisements: It is an important market category where the individual firms exercise their control over the price to a smaller or larger degree. Prof. Chamberlin called it âMonopolistic competitionâ. Under imperfect competition, there are large number of buyers and sellers. Each seller can follow its own price-output policy. Each producer produces the differentiated product, which are close substitutes of each other.