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.
The existence of such perfect markets are quite rare in the real world, and the perfectly competitive marketplace is a formation of economic theory to help better understand other forms of market competition such as monopolistic and oligopolistic.erfect competition explains an economic theory of a marketplace which does not happen to exist in reality. Summary: Perfect Competition vs Monopolistic Competition. 1  Perfect and monopolistic competitions are both forms of market situations that describe the levels of competition within a market structure.