Four propane delivery firms have a tacit agreement to charge a service fee of $50 in addition to $5 per gallon of propane. If the firms' cost of propane increases and one of the four firms advertises that it will increase the service fee to $75 and raise the cost of a gallon of propane to $5.50 next month, this is an example of ________.

Competition between the United States and Mexico is

A) equivalent to the competition between two giant corporations. B) a struggle over which country will get the best jobs. C) unfair if wages in Mexico are lower than in the United States. D) not a meaningful way to analyze trade.

The liquidity trap is the _____ section of the demand curve for money.

A. flat section of the speculative B. flat section of the precautionary C. vertical section of the speculative D. vertical section of the precautionary