An increase in saving that leads to more capital accumulation ________ labor productivity

Thomas Edison once complained that he was not making a profit selling light bulbs because his plants were operating 25 percent below capacity. He estimated that he could increase output 25 percent with a 2 percent increase in the cost of production. He sold the 25 percent on the foreign market at a price below what he called the "cost of production." We can deduce that Edison really meant

a. Marginal cost was below average cost but less than marginal revenue. b. Average cost exceeded variable cost, which exceeded marginal revenue. c. Variable cost exceeded fixed cost but was less than marginal revenue. d. Marginal cost was above average cost but greater than marginal revenue.

If the cross-elasticity of demand for two goods is positive, this means that the goods are:

A. normal goods. B. inferior goods. C. substitutes. D. complements.