The definition of a trial is  a hearing in a court case, a test or a hardship. An example of trial is the court case of an accused robber. An example of trial is the use of a small size bottle of shampoo to sample the product.
An example of a market that meets all four conditions for perfect competition is: wheat. A market structure with many sellers and many buyers is: perfect competition. Offering products of different tastes and shapes is an example of: nonprice competition. An example of a barrier to entry is: high start-up costs. Compared to a market with perfect competition, a monopoly often has: higher prices and fewer goods. In many industries, deregulation has resulted in: lower prices for consumers. A market that is an oligopoly has: a few firms dominating the market.
Monopolistic competition. The model of monopolistic competition describes a common market structure in which firms have many competitors, but each one sells a slightly different product.onopolistic competition as a market structure was first identified in the 1930s by American economist Edward Chamberlin, and English economist Joan Robinson. Many small businesses operate under conditions of monopolistic competition, including independently owned and operated high-street stores and restaurants.