Economies of scope exist between book publishing and magazine publishing if A. the cost of producing the magazines and books together is less than producing them separately. B. the cost of publishing a book is not subject to diminishing marginal returns. C. the cost of publishing a book falls over time as the publisher acquires more experience. D. the cost of publishing a magazine is lower for firms that publish many magazines than for firms that publish only one magazine.

The basic difference between macroeconomics and microeconomics is that: a. microeconomics looks at the forest (aggregate markets) while macroeconomics looks at the trees (individual markets). b. macroeconomics is concerned with groups of individuals while microeconomics is concerned with single countries. c. microeconomics is concerned with the trees (individual markets) while macroeconomics is concerned with the forest (aggregate markets). d. macroeconomics is concerned with generalization while microeconomics is concerned with specialization.