The proper level of government intervention is unclear when dealing with a monopoly

The coefficient of determination is defined as the:

A) ratio of the total sum of squared errors to the sum of squared errors. B) ratio of the regression sum of squares to the sum of the squared errors. C) ratio of the sum of squared errors to the total sum of squared errors. D) none of the above.

Agraria sends wheat to Cyberia in exchange for computers and technology goods. This is an example of

a. unidirectional trade. b. joint venture. c. barter. d. monetary exchange.