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Measuring Spatial Integration in Tomato and Onion Markets of Pakistan: An Application of Error Correction Model in the Presence of Stationarity

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  • Lohano, Heman D.
  • Mari, Fateh M.

Abstract

This paper empirically evaluates the degree of integration among spatially separated markets using monthly wholesale real price series of tomato and onion from regional markets located in each of the four provinces of Pakistan. Unit root test indicates that the price series are stationary, and are represented as autoregressive model for each region. Results of the error correction model show that the markets of both tomato and onion are spatially integrated, however, the overall degree of integration in onion markets is relatively stronger than in tomato markets. This difference may be attributed to relatively lower degree of perishability in onion as compared to tomato.

Suggested Citation

  • Lohano, Heman D. & Mari, Fateh M., 2012. "Measuring Spatial Integration in Tomato and Onion Markets of Pakistan: An Application of Error Correction Model in the Presence of Stationarity," 2012 Annual Meeting, August 12-14, 2012, Seattle, Washington 124611, Agricultural and Applied Economics Association.
  • Handle: RePEc:ags:aaea12:124611
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    References listed on IDEAS

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    1. Gloria González-Rivera & Steven M. Helfand, 2001. "The Extent, Pattern, and Degree of Market Integration: A Multivariate Approach for the Brazilian Rice Market," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 83(3), pages 576-592.
    2. Vollrath, Thomas L., 2003. "North American Agricultural Market Integration And Its Impact On The Food And Fiber System," Agricultural Information Bulletins 33639, United States Department of Agriculture, Economic Research Service.
    3. Merle D. Faminow & Bruce L. Benson, 1990. "Integration of Spatial Markets," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 72(1), pages 49-62.
    4. Richard J. Sexton & Catherine L. Kling & Hoy F. Carman, 1991. "Market Integration, Efficiency of Arbitrage, and Imperfect Competition: Methodology and Application to U.S. Celery," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 73(3), pages 568-580.
    5. Dickey, David A & Fuller, Wayne A, 1981. "Likelihood Ratio Statistics for Autoregressive Time Series with a Unit Root," Econometrica, Econometric Society, vol. 49(4), pages 1057-1072, June.
    6. Teresa Serra & Barry K. Goodwin & José M. Gil & Anthony Mancuso, 2006. "Non-parametric Modelling of Spatial Price Relationships," Journal of Agricultural Economics, Wiley Blackwell, vol. 57(3), pages 501-522.
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    More about this item

    Keywords

    Market integration; Error correction model; Stationarity; Demand and Price Analysis; Marketing; Q13; C22;

    JEL classification:

    • Q13 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Agricultural Markets and Marketing; Cooperatives; Agribusiness
    • C22 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Time-Series Models; Dynamic Quantile Regressions; Dynamic Treatment Effect Models; Diffusion Processes

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