The necessary condition for identification of an equation is called the _____.

The income per worker of a country increases if ________

A) the number of children in the country aged below 15 increases B) the country's GDP increases, all other variables remaining constant C) the number of retired people in the country increases D) the country's GDP falls, all other variables remaining constant

The outcome of the Stackelberg model is

A) a Nash equilibrium. B) the same as the Cournot outcome. C) that the follower earns zero profit. D) that the follower cannot be on its best-response curve.