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Do Supply Curves Slope Up?


  • John Shea


This paper examines the short-run responses of price and quantity to exogenous demand shocks for disaggregated U. S. manufacturing industries, using prior information on input-output linkages to identify industries whose fluctuations are likely to function as approximately exogenous demand shocks for other industries. I find that demand shocks induce positive covariation between price and quantity for 16 out of 26 sample industries, controlling for observable cost shift variables. When sample industries are pooled, I estimate that a demand shock which initially raises industry output by 1 percent generates a price increase of 0.182 percent within one year. I find that input-output instruments detect upward sloping supply curves more readily than least squares or other commonly used demand-shift instruments.

Suggested Citation

  • John Shea, 1993. "Do Supply Curves Slope Up?," The Quarterly Journal of Economics, Oxford University Press, vol. 108(1), pages 1-32.
  • Handle: RePEc:oup:qjecon:v:108:y:1993:i:1:p:1-32.

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    References listed on IDEAS

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    9. Lawrence H. Summers, 1981. "Taxation and Corporate Investment: A q-Theory Approach," Brookings Papers on Economic Activity, Economic Studies Program, The Brookings Institution, vol. 12(1), pages 67-140.
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