.  Consider a firm that has no fixed costs and that is currently losing money. Are there any situations in which it would want to stay open for business in the short run?   3.  Why is the equality of marginal revenue and marginal cost essential for profit maximization in all market structures? Explain why price can be substituted for marginal revenue in the MR = MC rule when an industry is purely competitive.

Principles of Economics, 7th Edition (MindTap Course List)
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Chapter14: Firms In Competitive Markets
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2.  Consider a firm that has no fixed costs and that is currently losing money. Are there any situations in which it would want to stay open for business in the short run?
 
3.  Why is the equality of marginal revenue and marginal cost essential for profit maximization in all market structures? Explain why price can be substituted for marginal revenue in the MR = MC rule when an industry is purely competitive. 
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