The opportunity cost to the firm of producing one more unit of output is also called marginal cost

If a firm that repairs both motorcycles and cars is able to do so at a lower cost than a firm that does only one or the other, this would be an example of

A) economies of scope. B) economies of scale. C) monitoring. D) increasing transactions costs.

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.