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.
The three conditions for monopolistic competition are (1) a large number of. producers, (2) differentiated products, and (3) free entry and exit. a. There are many bands that play at weddings, parties, and so on. There are no sig-. nificant barriers to entry or exit.
(In reality they may be the same good one the same demand scale.) An increase in the price of gas at one station will have a perfectly correlated effect on the increase in demand at the other station. Monopolistic competition presents an interesting case of complications with the concept of perfect substitutes.