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The Integration of Tomato Markets in Ghana with and without Direct Trade Flows

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Listed author(s):
  • Ihle, Rico
  • Amikuzuno, Joseph

Abstract

Spatial market equilibrium theory views trade flow as the driving force behind market integration. We assess spatial price transmission between domestic tomato markets in Ghana to ascertain whether spatial price transmission veritably depends on direct trade between markets, or whether other forces drive market integration. We analyze a unique data set on tomato trade consisting of semi-weekly price and trade flow data for the five most important Ghanaian markets for fresh tomato, which represents one of the most important commercially produced and consumed vegetables in the country. A regime-dependent vector error correction model is proposed to investigate this question, and the results are compared with those of a linear vector error correction model. The analysis reveals that prices in net producing areas of Ghana, viz. Navrongo and Techiman, adjust quickly to disequilibria, while prices in most major consuming areas do not show significant error correction. Markets are partly found to be strongly integrated even in periods without direct trade flows. Information exchange among suppliers or third-market effects might offer possible explanations to this finding.

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File URL: http://purl.umn.edu/51402
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Paper provided by International Association of Agricultural Economists in its series 2009 Conference, August 16-22, 2009, Beijing, China with number 51402.

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Date of creation: 2009
Handle: RePEc:ags:iaae09:51402
Contact details of provider: Web page: http://www.iaae-agecon.org/
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Keywords: Keywords— spatial market integration; regime-dependent vector error correction model; information flow; Ghana; tomato.; Agricultural and Food Policy; Food Security and Poverty; International Relations/Trade; Marketing; JEL: C32; Q11; Q13; F14;

Find related papers by JEL classification:

  • C32 - Mathematical and Quantitative Methods - - Multiple or Simultaneous Equation Models; Multiple Variables - - - Time-Series Models; Dynamic Quantile Regressions; Dynamic Treatment Effect Models; Diffusion Processes; State Space Models
  • Q11 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Aggregate Supply and Demand Analysis; Prices
  • Q13 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Agricultural Markets and Marketing; Cooperatives; Agribusiness
  • F14 - International Economics - - Trade - - - Empirical Studies of Trade

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  1. Hansen, Bruce E. & Seo, Byeongseon, 2002. "Testing for two-regime threshold cointegration in vector error-correction models," Journal of Econometrics, Elsevier, vol. 110(2), pages 293-318, October.
  2. Bob Baulch, 1997. "Transfer Costs, Spatial Arbitrage, and Testing for Food Market Integration," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 79(2), pages 477-487.
  3. Christopher B. Barrett, 1996. "Market Analysis Methods: Are Our Enriched Toolkits Well Suited to Enlivened Markets?," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 78(3), pages 825-829.
  4. Jesús Gonzalo & Jean-Yves Pitarakis, 2006. "Threshold Effects in Cointegrating Relationships," Oxford Bulletin of Economics and Statistics, Department of Economics, University of Oxford, vol. 68(s1), pages 813-833, December.
  5. Christopher B. Barrett & Jau Rong Li, 2002. "Distinguishing between Equilibrium and Integration in Spatial Price Analysis," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 84(2), pages 292-307.
  6. Paul L. Fackler & Hüseyin Tastan, 2008. "Estimating the Degree of Market Integration," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 90(1), pages 69-85.
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Cited by:

  1. Robinson, Elizabeth J. Z. & Kolavalli, Shashi L., 2010. "The case of tomato in Ghana: Processing," GSSP working papers 21, International Food Policy Research Institute (IFPRI).
  2. Amikuzuno, Joseph & Ihle, Rico, 2010. "Seasonal Asymmetric Price Transmission in Ghanaian Tomato Markets: Adapting Johansen’s Estimation Method," 2010 AAAE Third Conference/AEASA 48th Conference, September 19-23, 2010, Cape Town, South Africa 96814, African Association of Agricultural Economists (AAAE);Agricultural Economics Association of South Africa (AEASA).
  3. Fabio Gaetano Santeramo, 2015. "Price Transmission in the European Tomatoes and Cauliflowers Sectors," Agribusiness, John Wiley & Sons, Ltd., vol. 31(3), pages 399-413, 06.
  4. Shrestha, Rudra Bahadur & Huang, Wen-Chi & Ghimire, Raju, 2. "Market Price Cointegration Of Tomato: Effects To Nepalese Farmers," International Journal of Food and Agricultural Economics (IJFAEC), Alanya Alaaddin Keykubat University, Department of Economics and Finance, vol. 2(2).
  5. Robinson, Elizabeth J. Z. & Kolavalli, Shashi L., 2010. "The case of tomato in Ghana: Marketing," GSSP working papers 20, International Food Policy Research Institute (IFPRI).

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