The Consumer Price Index (CPI) is a weighted average of all the prices paid by households for goods and services

Once an equilibrium is achieved, it can persist indefinitely because

A) shocks that shift the demand curve or the supply curve cannot occur. B) shocks to the demand curve are always exactly offset by shocks to the supply curve. C) the government never intervenes in markets at equilibrium. D) in the absence of supply/demand shocks no one applies pressure to change the price.

Briefly and concisely define the following terms: a. Price discrimination b. Tying contracts c. Concentration ratio d. Market power

What will be an ideal response?