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.
Definition of mass market â A mass market can be defined as a term used for the largest group of consumers for a specified products. A mass market is broad in nature and is not categorized by demographics. Mass market is the extreme opposite of niche markets.