An economic consultant for Gumbcorp. recently provided the firm’s marketing manager with this estimate of the demand function for the firm’s product:

ENGR.ECONOMIC ANALYSIS
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Chapter1: Making Economics Decisions
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An economic consultant for Gumbcorp. recently provided the firm’s marketing manager with this estimate of the demand function for the firm’s product:

  •  
  • Qxd=12,000 -3Px + 4Py - 1M + 2Ax
  •  
  • where Qxd represents the amount consumed of good X, Px is the price of good X, is the price of good Y, M is income, and Ax represents the amount of advertising spent on good X.
  •  
  • Suppose good X sells for $200 per unit, good Y sells for $15 per unit, the company utilizes 2,000 units of advertising, and consumer income is $10,000.
  • How much of good X do consumers purchase?
  • Are goods X and Y substitutes or complements?

Is good X a normal or an inferior good

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