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.
Types of Markets & Concentration Measures. Sellers must take the existing market price and they will adjust the quantity of their products so as to maximize profit at the market price. Because sellers must take the current market price, a purely competitive market also is called a price takers market. While perfectly competitive markets have a homogeneity of goods, price-searcher markets have a differentiation of goods.