In this case all of the cracks and crevices are sealed. Then a hole is put in the slab to install the small fan and create sub-slab suction. The average Radon mitigation cost in Portland, Oregon, or Vancouver, Washington is between $800 to $2,500 with an average of $1,200.
A central feature of monopolistic competition is that products are differentiated. There are four main types of differentiation: Physical product differentiation, where firms use size, design, colour, shape, performance, and features to make their products different. For example, consumer electronics can easily be physically differentiated.
Pure monopoly exists when a single firm is the sole producer of a product for which there are no close substitutes. Examples are public utilities and professional sports leagues, Characteristics 1. A single seller: the firm and industry are synonymous. 2. Unique product: no close substitutes for the firm s product. 3. The firm is the price maker: the firm has considerable control over the price because it can control the quantity supplied. 4. Entry or exit is blocked. Barriers to Entry Economies of scale is the major barrier.