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Estimating Market Power of Tea Processing Sector

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  • Weerahewa, Jeevika

Abstract

It is generally believed that the food processing sector can exercise market power on raw material producers and final consumers. The objective of this study was to assess the degree of oligopoly and oligopsony power of the tea-processing sector. A partial equilibrium model was developed for the world market for tea, treating India, Kenya and Sri Lanka as raw tea producers and Canada, United Kingdom and the United States of America as tea consumers. An imperfectly competitive tea-processing sector was incorporated in the model allowing conjectural variation elasticity to represent the degree of market power. The model was econometrically estimated using the two-stage least square estimation procedure. Results of the econometric estimation show that all the market power estimates are statistically significant. The conjectural elasticity values in the input market are 0.0516, 0.0015 and 0.1657 for India, Kenya and Sri Lanka respectively. The conjectural variation elasticity in the output market is 0.1273. The elasticity of supply with respect to own prices are 0.0791, 0.2268 and 0.2060 for India, Kenya and Sri Lanka respectively. The elasticity of demand with respect to own prices are –0.4720, –0.1556 and –0.1237 for Canada, United Kingdom and the United States respectively. The resulting Learner Index for Sri Lanka is very small indicating that Sri Lankan tea producers are not significantly exploited by tea processors.

Suggested Citation

  • Weerahewa, Jeevika, 2003. "Estimating Market Power of Tea Processing Sector," Sri Lankan Journal of Agricultural Economics, Sri Lanka Agricultural Economics Association (SAEA), vol. 5, pages 1-15.
    • Handle: RePEc:ags:saeasj:205938
    DOI: 10.22004/ag.econ.205938
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    References listed on IDEAS

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    2. Yukichika Kawata, 2011. "Extended Model of the Natural Resource Input-Output Market: Game Meat in Latvia as an Example," South-Eastern Europe Journal of Economics, Association of Economic Universities of South and Eastern Europe and the Black Sea Region, vol. 9(2), pages 167-185.
    3. Michael Fesseha Yohannes & Toshinobu Matsuda, 2016. "Weather Effects on Household Demand for Coffee and Tea in Japan," Agribusiness, John Wiley & Sons, Ltd., vol. 32(1), pages 33-44, January.
    4. Farajzadeh, Z. & Amiraslany, A., 2018. "Examination of the international market power for Iranian pistachios," 2018 Conference, July 28-August 2, 2018, Vancouver, British Columbia 277345, International Association of Agricultural Economists.
    5. Nguyen Thi Tuoi & Nguyen Phu Son & Pham Le Thong, 2021. "Estimating the Market Power of Traders in the Arabica Coffee Value Chain in Lam Dong, Vietnam," International Journal of Economics and Financial Research, Academic Research Publishing Group, vol. 7(3), pages 102-108, 09-2021.
    6. Nguyen Thi Tuoi & Nguyen Phu Son & Pham Le Thong, 2022. "Analysis of farmers’ market power in the value chain of Arabica coffee in Lam Dong Province, Vietnam," HO CHI MINH CITY OPEN UNIVERSITY JOURNAL OF SCIENCE - ECONOMICS AND BUSINESS ADMINISTRATION, HO CHI MINH CITY OPEN UNIVERSITY JOURNAL OF SCIENCE, HO CHI MINH CITY OPEN UNIVERSITY, vol. 12(1), pages 139-147.
    7. Rathnayake, Chinthani & Griffith, Garry & Sinnett, Alexandria & Malcolm, Bill & Farquharson, Bob, 2023. "Developing an Equilibrium Displacement Model of the Sri Lankan Tea Industry," Australasian Agribusiness Review, University of Melbourne, Department of Agriculture and Food Systems, vol. 31(2), April.

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