Suppose the own-price elasticity of demand for good X is -2, its income elasticity is 3, its advertising elasticity is 4, and the cross-price elasticity of demand between it and good Y is -6. How much will consumption of this good change if advertising is increased by 5 percent

The answer is fast food restaurants use technology designed to reduce the need for skilled labor. 

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Answeremphasizes the role changing productivity and technology in causing economic fluctuations;