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Aggregate fluctuations and the network structure of intersectoral trade

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Abstract

This paper analyzes the flow of intermediate inputs across sectors by adopting a network perspective on sectoral interactions. I apply these tools to show how fluctuations in aggregate economic activity can be obtained from independent shocks to individual sectors. First, I characterize the network structure of input trade in the U.S. On the demand side, a typical sector relies on a small number of key inputs and sectors are homogeneous in this respect. However, in their role as input-suppliers sectors do differ: many specialized input suppliers coexist alongside general purpose sectors functioning as hubs to the economy. I then develop a model of intersectoral linkages that can reproduce these connectivity features. In a standard multisector setup, I use this model to provide analytical expressions linking aggregate volatility to the network structure of input trade. I show that the presence of sectoral hubs - by coupling production decisions across sectors - leads to fluctuations in aggregates.

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Bibliographic Info

Paper provided by Department of Economics and Business, Universitat Pompeu Fabra in its series Economics Working Papers with number 1206.

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Date of creation: Nov 2007
Date of revision: Oct 2010
Handle: RePEc:upf:upfgen:1206

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Web page: http://www.econ.upf.edu/

Related research

Keywords: Aggregation; Business Cycles; Comovement; Input-Output; Multisector Growth Models; Networks; Technological Diversification.;

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  1. Xavier Gabaix & Yannis M. Ioannides, 2003. "The Evolution of City Size Distributions," Discussion Papers Series, Department of Economics, Tufts University 0310, Department of Economics, Tufts University.
  2. Russell Cooper & John C. Haltiwanger, 1987. "Inventories and the Propagation of Sectoral Shocks," NBER Working Papers 2425, National Bureau of Economic Research, Inc.
  3. Horvath, Michael, 2000. "Sectoral shocks and aggregate fluctuations," Journal of Monetary Economics, Elsevier, vol. 45(1), pages 69-106, February.
  4. Bak, Per & Chen, Kan & Scheinkman, Jose & Woodford, Michael, 1993. "Aggregate fluctuations from independent sectoral shocks: self-organized criticality in a model of production and inventory dynamics," Ricerche Economiche, Elsevier, vol. 47(1), pages 3-30, March.
  5. Nirei, Makoto, 2006. "Threshold behavior and aggregate fluctuation," Journal of Economic Theory, Elsevier, vol. 127(1), pages 309-322, March.
  6. Shea, John S, 2002. "Complementarities and Comovements," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 34(2), pages 412-33, May.
  7. Szyld, Daniel B, 1985. "Conditions for the Existence of a Balanced Growth Solution for the Leontief Dynamic Input-Output Model," Econometrica, Econometric Society, vol. 53(6), pages 1411-19, November.
  8. Jovanovic, Boyan, 1987. "Micro Shocks and Aggregate Risk," The Quarterly Journal of Economics, MIT Press, vol. 102(2), pages 395-409, May.
  9. Xavier Gabaix, 2009. "The Granular Origins of Aggregate Fluctuations," NBER Working Papers 15286, National Bureau of Economic Research, Inc.
  10. Dupor, Bill, 1999. "Aggregation and irrelevance in multi-sector models," Journal of Monetary Economics, Elsevier, vol. 43(2), pages 391-409, April.
  11. Scheinkman, Jose A & Woodford, Michael, 1994. "Self-Organized Criticality and Economic Fluctuations," American Economic Review, American Economic Association, vol. 84(2), pages 417-21, May.
  12. Michael Horvath, 1998. "Cyclicality and Sectoral Linkages: Aggregate Fluctuations from Independent Sectoral Shocks," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 1(4), pages 781-808, October.
  13. James E. Rauch, 1996. "Networks versus Markets in International Trade," NBER Working Papers 5617, National Bureau of Economic Research, Inc.
  14. Timothy G. Conley & Bill Dupor, 2003. "A Spatial Analysis of Sectoral Complementarity," Journal of Political Economy, University of Chicago Press, vol. 111(2), pages 311-352, April.
  15. Norrbin, Stefan C. & Schlagenhauf, Don E., 1990. "Sources of output fluctuations in the United States during the inter-war and post-war years," Journal of Economic Dynamics and Control, Elsevier, vol. 14(3-4), pages 523-551, October.
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