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

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  • 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.

Suggested Citation

  • Ihle, Rico & Amikuzuno, Joseph, 2009. "The Integration of Tomato Markets in Ghana with and without Direct Trade Flows," 2009 Conference, August 16-22, 2009, Beijing, China 51402, International Association of Agricultural Economists.
    • Handle: RePEc:ags:iaae09:51402
    DOI: 10.22004/ag.econ.51402
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    References listed on IDEAS

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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).
    3. Shrestha, Rudra Bahadur & Huang, Wen-Chi & Ghimire, Raju, 2014. "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), pages 1-10, April.
    4. 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).
    5. Fabio Gaetano Santeramo, 2015. "Price Transmission in the European Tomatoes and Cauliflowers Sectors," Agribusiness, John Wiley & Sons, Ltd., vol. 31(3), pages 399-413, June.

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