Cost pools can range from broad, such as all manufacturing-plant costs, to narrow, such as the costs of operating metal-cutting machines

When we test for the differences between percentages for two groups the null hypothesis is that the difference in the two group's population parameters is over 30

Indicate whether the statement is true or false

Which of the following creates a barrier to subsequent entries in an industry dominated by first movers?

A. The laissez-faire stance toward trade adopted by first movers B. Implementation of policies to maximize imports and minimize exports C. Specializing in the production of goods for which firms have an comparative advantage D. The ability of first movers to benefit from increasing returns E. Decrease in the variety of goods available to consumers and increase in the cost of existing goods