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Does oligopsony power matter in price support policy design? Empirical evidence from the Thai Jasmine rice market

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  • Kaittisak Kumse
  • Nobuhiro Suzuki
  • Takeshi Sato

Abstract

In the oligopsony market, farmers may receive low prices and policy analysis assuming perfect competition can yield serious bias results. In this paper, we estimate oligopsony power between processors and farmers and evaluate the welfare impact of the paddy pledging program (PPP), a generous price support program in the Thai Jasmine rice market, with an imperfect competition model. We develop a model that consists of rice supply equation and derived demand equation. We then simultaneously estimate these equations using system estimation methods to recover oligopsony power parameters. Finally, we use these parameters to assess the welfare impact of the price support program. Using annual panel data running from crop marketing year 2001/2002–2015/2016 and exploiting the institutional feature of the PPP, we find strong evidence of some oligopsony power, a moderate level of oligopsony price distortion, and a negative relationship between price support and oligopsony power. We also find that the PPP is inefficient but effective in income redistribution. Moreover, the program benefits both farmers and consumers. With better policymaking decisions, the PPP can be efficient by setting a suitable support price. Therefore, our results show that in the case of the Thai Jasmine rice market, the generally accepted “wisdom” about agricultural price support policy does not necessarily hold, and price support can be designed to improve the efficiency of the market.

Suggested Citation

  • Kaittisak Kumse & Nobuhiro Suzuki & Takeshi Sato, 2020. "Does oligopsony power matter in price support policy design? Empirical evidence from the Thai Jasmine rice market," Agricultural Economics, International Association of Agricultural Economists, vol. 51(3), pages 373-385, May.
    • Handle: RePEc:bla:agecon:v:51:y:2020:i:3:p:373-385
    DOI: 10.1111/agec.12560
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