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Yield Effects of Tissue Culture Bananas in Kenya: Accounting for Selection Bias and the Role of Complementary Inputs

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  • Nassul S. Kabunga

    (Georg-August-University Göttingen)

  • Thomas Dubois

    (International Institute of Tropical Agriculture (IITA))

  • Matin Qaim

    (Georg-August-University Göttingen)

Abstract

We analyze yield effects of tissue culture (TC) banana technology in the Kenyan small farm sector, using recent survey data and an endogenous switching regression approach. TC banana plantlets, which are free from pests and diseases, have been introduced in East Africa since the late-1990s. While field experiments show significant yield advantages over traditional banana suckers, a rigorous assessment of impacts in farmers’ fields is still outstanding. A comparison of mean yield levels between TC adopters and non-adopters in our sample shows no significant difference. However, we find a negative selection bias, indicating that farmers with lower than average yields are more likely to adopt TC. Controlling for this bias results in a positive and significant TC net yield gain of 7%. We also find that TC technology is more knowledge-intensive and more responsive to irrigation than traditional bananas. Simulations show that improving access to irrigation could lift TC productivity gains to above 20%. The analytical approach developed and applied here may also be useful for the evaluation of other knowledge-intensive package technologies and innovations in perennial crops.

Suggested Citation

  • Nassul S. Kabunga & Thomas Dubois & Matin Qaim, 2011. "Yield Effects of Tissue Culture Bananas in Kenya: Accounting for Selection Bias and the Role of Complementary Inputs," Courant Research Centre: Poverty, Equity and Growth - Discussion Papers 82, Courant Research Centre PEG.
  • Handle: RePEc:got:gotcrc:082
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    1. Noltze, Martin & Schwarze, Stefan & Qaim, Matin, 2013. "Impacts of natural resource management technologies on agricultural yield and household income: The system of rice intensification in Timor Leste," Ecological Economics, Elsevier, vol. 85(C), pages 59-68.
    2. Enoch M. Kikulwe & Nassul .S. Kabunga & Matin Qaim, 2012. "Impact of tissue culture banana technology in Kenya: A difference-in-difference estimation approach," Courant Research Centre: Poverty, Equity and Growth - Discussion Papers 117, Courant Research Centre PEG.
    3. Lambrecht, Isabel & Vanlauwe, Bernard & Merckx, Roel & Maertens, Miet, 2014. "Understanding the Process of Agricultural Technology Adoption: Mineral Fertilizer in Eastern DR Congo," World Development, Elsevier, vol. 59(C), pages 132-146.
    4. Krishna, Vijesh & Euler, Michael & Siregar, Hermanto & Qaim, Matin, 2016. "Farmer heterogeneity and differential livelihood impacts of oil palm expansion in Sumatra, Indonesia," 2016 Annual Meeting, July 31-August 2, 2016, Boston, Massachusetts 235218, Agricultural and Applied Economics Association.
    5. repec:spr:ssefpa:v:9:y:2017:i:3:d:10.1007_s12571-017-0669-z is not listed on IDEAS
    6. Fischer, Elisabeth & Qaim, Matin, 2012. "Gender, Agricultural Commercialization, and Collective Action in Kenya," 2012 Conference, August 18-24, 2012, Foz do Iguacu, Brazil 126659, International Association of Agricultural Economists.
    7. Kikulwe, Enoch M. & Fischer, Elisabeth & Qaim, Matin, 2013. "Mobile money, market transactions, and household income in rural Kenya," Discussion Papers 155847, Georg-August-Universitaet Goettingen, GlobalFood, Department of Agricultural Economics and Rural Development.
    8. Jonas Kathage & Menale Kassie & Bekele Shiferaw & Matin Qaim, 2016. "Big Constraints or Small Returns? Explaining Nonadoption of Hybrid Maize in Tanzania," Applied Economic Perspectives and Policy, Agricultural and Applied Economics Association, vol. 38(1), pages 113-131.
    9. Vandercasteelen, Joachim & Dereje, Mekdim & Minten, Bart & Taffesse, Alemayehu Seyoum, 2016. "Row planting teff in Ethiopia: Impact on farm-level profitability and labor allocation," ESSP working papers 92, International Food Policy Research Institute (IFPRI).
    10. Krishna, Vijesh V. & Euler, Michael & Siregar, Hermanto & Fathoni, Zakky & Qaim, Matin, 2015. "Farmer heterogeneity and differential livelihood impacts of oil palm expansion among smallholders in Sumatra, Indonesia," EFForTS Discussion Paper Series 13, University of Goettingen, Collaborative Research Centre 990 "EFForTS, Ecological and Socioeconomic Functions of Tropical Lowland Rainforest Transformation Systems (Sumatra, Indonesia)".
    11. Fischer, Elisabeth & Qaim, Matin, 2012. "Gender, Agricultural Commercialization, and Collective Action in Kenya," Discussion Papers 121229, Georg-August-Universitaet Goettingen, GlobalFood, Department of Agricultural Economics and Rural Development.
    12. Langat, B.K. & Ngéno, V.K. & Nyangweso, Philip M. & Mutwol, M. J. & Gohole, L. & Yaninek, S., 2013. "Drivers of Technology Adoption in a Subsistence Economy: The case of Tissue Culture Bananas in Western Kenya," 2013 AAAE Fourth International Conference, September 22-25, 2013, Hammamet, Tunisia 161444, African Association of Agricultural Economists (AAAE).
    13. Awudu Abdulai & Wallace Huffman, 2014. "The Adoption and Impact of Soil and Water Conservation Technology: An Endogenous Switching Regression Application," Land Economics, University of Wisconsin Press, vol. 90(1), pages 26-43.
    14. Kabunga, Nassul S. & Dubois, Thomas & Qaim, Matin, 2014. "Impact of tissue culture banana technology on farm household income and food security in Kenya," Food Policy, Elsevier, vol. 45(C), pages 25-34.
    15. Noltze, Martin & Schwarze, Stefan & Qaim, Matin, 2012. "Farm Diversity and Heterogeneous Impacts of System Technologies on Yield, Income and Poverty: The System of Rice Intensification in Timor Leste," 2012 Conference, August 18-24, 2012, Foz do Iguacu, Brazil 125595, International Association of Agricultural Economists.
    16. Joachim Vandercasteelen & Mekdim Dereje & Bart Minten & Alemayehu Seyoum Taffesse, 2013. "Scaling-up adoption of improved technologies: The impact of the promotion of row planting on farmers’ teff yields in Ethiopia," LICOS Discussion Papers 34413, LICOS - Centre for Institutions and Economic Performance, KU Leuven.
    17. Shiferaw, Bekele & Kassie, Menale & Jaleta, Moti & Yirga, Chilot, 2014. "Adoption of improved wheat varieties and impacts on household food security in Ethiopia," Food Policy, Elsevier, vol. 44(C), pages 272-284.

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    Keywords

    Biotechnology; adoption; productivity; impact; endogenous switching regression; Kenya;

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