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Maize Trade Liberalization vs. Fertilizer Subsidies in Tanzania: A CGE Model Analysis with Endogenous Soil Fertility

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  • Sverre Grepperud
  • Henrik Wiig
  • Finn Roar Aune

    ()
    (Statistics Norway)

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    Abstract

    This paper presents an analysis on economy-environmental interlinkages for Tanzania by using a computable general equilibrium (CGE) model based on a social accounting matrix. The purpose of the analysis is to include general equilibrium effects when evaluating two suggested policy measures meant to stimulate growth and crop production. The model is multisectoral with a particular focus on crop producing sectors and soil mining processes. Maize trade liberalization and a fertilizer subsidy are considered. The model simulations show that both policy reforms have expansive effects and that there are significant sectoral complementarities between agriculture and non-agriculture in Tanzania. Fertilizer subsidies promotes cash crop production and a more land intensive production pattern in agriculture, while a maize trade liberalization stimulates food crops and a more land extensive agriculture. Fertilizer subsidies are found to imply far more expansive effects than a trade liberalization does. Only minor differences are identified between the two policy reforms as concerning their impact on the balance of trade, distribution and the environment.

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    Bibliographic Info

    Paper provided by Research Department of Statistics Norway in its series Discussion Papers with number 249.

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    Date of creation: Feb 1999
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    Handle: RePEc:ssb:dispap:249

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    Keywords: CGE-model; soil fertility; trade reform; agricultural subsidy.;

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    1. Alfsen, Knut H. & De Franco, Mario A. & Glomsrod, Solveig & Johnsen, Torgeir, 1996. "The cost of soil erosion in Nicaragua," Ecological Economics, Elsevier, vol. 16(2), pages 129-145, February.
    2. Alfsen, Knut H. & Bye, Torstein & Glomsr D, Solveig & Wiig, Henrik, 1997. "Soil degradation and economic development in Ghana," Environment and Development Economics, Cambridge University Press, vol. 2(02), pages 119-143, May.
    3. Persson, Annika & Munasinghe, Mohan, 1995. "Natural Resource Management and Economywide Policies in Costa Rica: A Computable General Equilibrium (CGE) Modeling Approach," World Bank Economic Review, World Bank Group, vol. 9(2), pages 259-85, May.
    4. Repetto, Robert, 1987. "Economic Incentives for Sustainable Production," The Annals of Regional Science, Springer, vol. 21(3), pages 44-59, November.
    5. Lipumba, Nguyuru & Ndulu, Benno & Horton, Sue & Plourde, Andre, 1988. "A supply constrained macroeconometric model of Tanzania," Economic Modelling, Elsevier, vol. 5(4), pages 354-376, October.
    6. Dercon, Stefan, 1993. "Peasant Supply Response and Macroeconomic Policies: Cotton in Tanzania," Journal of African Economies, Centre for the Study of African Economies (CSAE), vol. 2(2), pages 157-94, October.
    7. Bagachwa, M. S. D. & Naho, A., 1995. "Estimating the second economy in Tanzania," World Development, Elsevier, vol. 23(8), pages 1387-1399, August.
    8. Stein Hansen, 1990. "Macroeconomic policies and sustainable development in the third World," Journal of International Development, John Wiley & Sons, Ltd., vol. 2(4), pages 533-557, October.
    9. Mohan Rao, J. & Caballero, Jose Maria, 1990. "Agricultural performance and development strategy: Retrospect and prospect," World Development, Elsevier, vol. 18(6), pages 899-913, June.
    10. Robinson, Sherman, 1989. "Multisectoral models," Handbook of Development Economics, in: Hollis Chenery & T.N. Srinivasan (ed.), Handbook of Development Economics, edition 1, volume 2, chapter 18, pages 885-947 Elsevier.
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