"The share of zombie firms has been increasing over time," said Bruno Albuquerque, an economist at the International Monetary Fund. "This has detrimental effects on healthy firms who compete in the same sector." Zombie firms are unprofitable businesses that stay afloat by taking on new debt. Economists say that zombie firms may become more prevalent when banks or governments bail out unviable firms. Watch the video above to learn more about the Fed's battle with unviable zombie firms in the U.S.

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Persons: Bruno Albuquerque, Banks, Kathryn Judge, Lotfi Karoui, Goldman Sachs, Jerome Powell Organizations: International Monetary Fund, Columbia University, Economists, Reserve, Economic, of New Locations: U.S, of New York