The tendency of opportunity cost to increase as production increases

a. is an example of theory that has not been proven by facts.
b. is a general principle, but not a universal fact.
c. is a universal fact, with no known exceptions.
d. rarely holds in reality, but is a useful theory.
e. cannot be tested with standard economic tools.

b

Economics

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A two-tier gold market like the one created during the Bretton Woods System refers to

A) a private tier for private gold traders where the price would not be allowed to fluctuate, and an official tier for central banks where the official gold price would be allowed to fluctuate. B) a private tier for private gold traders where the price would not be allowed to fluctuate, and an official tier for central banks where the official gold price would rise on a yearly basis by pre-determined increments. C) a private tier for private gold traders where the price would be allowed to fluctuate, and an official tier for central banks where the official gold price would be set at $35 an ounce. D) a private tier for private gold traders where the price would be set at $35 an ounce, and an official tier for central banks where the official gold price would be allowed to fluctuate. E) a private tier for private gold traders where the price of gold would rise on a yearly basis by pre-determined increments, and an official tier for central banks where the official gold price would be set at $35 an ounce.

Economics

When the interest rate changes,

A) the demand curve for bonds shifts to the right. B) the demand curve for bonds shifts to the left. C) the supply curve for bonds shifts to the right. D) it is because either the demand or the supply curve has shifted.

Economics