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.
In a purely competitive labor market... Wage rate is determined by the interaction of the market demand for and the supply of that labor. The firm will hire the amount of labor at which its marginal revenue product of labor is equal to its marginal labor cost.