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.
Perfect competition is the market structure in which there are many sellers and buyers, firms produce a homogeneous product, and there is free entry into and exit out of the industry (Amacher & Pate, 2013). A perfect competition is characterized by the fact that homogeneous products are being created.