IDEAS home Printed from https://ideas.repec.org/a/aea/aejapp/v13y2021i2p206-29.html
   My bibliography  Save this article

Subsidies and the African Green Revolution: Direct Effects and Social Network Spillovers of Randomized Input Subsidies in Mozambique

Author

Listed:
  • Michael Carter
  • Rachid Laajaj
  • Dean Yang

Abstract

The Green Revolution, which bolstered agricultural yields and economic well-being in Asia and Latin America beginning in the 1960s, largely bypassed sub-Saharan Africa. We study the first randomized controlled trial of a government-implemented input subsidy program (ISP) in Africa intended to foment a Green Revolution. We find that this temporary subsidy for Mozambican maize farmers stimulates Green Revolution technology adoption and leads to increased maize yields. Effects of the subsidy persist in later unsubsidized years. In addition, social networks of subsidized farmers benefit from spillovers, experiencing increases in technology adoption, yields, and beliefs about the returns to the technologies. Spillovers account for the vast majority of subsidy-induced gains. ISPs alleviate informational market failures, stimulating learning about new technologies by subsidy recipients and their social networks.

Suggested Citation

  • Michael Carter & Rachid Laajaj & Dean Yang, 2021. "Subsidies and the African Green Revolution: Direct Effects and Social Network Spillovers of Randomized Input Subsidies in Mozambique," American Economic Journal: Applied Economics, American Economic Association, vol. 13(2), pages 206-229, April.
    • Handle: RePEc:aea:aejapp:v:13:y:2021:i:2:p:206-29
    DOI: 10.1257/app.20190396
    as

    Download full text from publisher

    File URL: https://www.aeaweb.org/doi/10.1257/app.20190396
    Download Restriction: no
    File URL: https://doi.org/10.3886/E116761V2
    Download Restriction: no
    File URL: https://www.aeaweb.org/doi/10.1257/app.20190396.appx
    Download Restriction: no
    File URL: https://www.aeaweb.org/doi/10.1257/app.20190396.ds
    Download Restriction: no
    File URL: https://libkey.io/10.1257/app.20190396?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    Other versions of this item:

    References listed on IDEAS

    as
    1. Esther Duflo & Michael Kremer & Jonathan Robinson, 2011. "Nudging Farmers to Use Fertilizer: Theory and Experimental Evidence from Kenya," American Economic Review, American Economic Association, vol. 101(6), pages 2350-2390, October.
    2. Gashaw Tadesse Abate & Tanguy Bernard & Alan de Brauw & Nicholas Minot, 2018. "The impact of the use of new technologies on farmers’ wheat yield in Ethiopia: evidence from a randomized control trial," Agricultural Economics, International Association of Agricultural Economists, vol. 49(4), pages 409-421, July.
    3. Pascaline Dupas, 2014. "Short‐Run Subsidies and Long‐Run Adoption of New Health Products: Evidence From a Field Experiment," Econometrica, Econometric Society, vol. 82(1), pages 197-228, January.
    4. Gharad Bryan & Shyamal Chowdhury & Ahmed Mushfiq Mobarak, 2014. "Underinvestment in a Profitable Technology: The Case of Seasonal Migration in Bangladesh," Econometrica, Econometric Society, vol. 82(5), pages 1671-1748, September.
    5. Esther Duflo & Michael Kremer & Jonathan Robinson, 2008. "How High Are Rates of Return to Fertilizer? Evidence from Field Experiments in Kenya," American Economic Review, American Economic Association, vol. 98(2), pages 482-488, May.
    6. Dean Karlan & Robert Osei & Isaac Osei-Akoto & Christopher Udry, 2014. "Agricultural Decisions after Relaxing Credit and Risk Constraints," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 129(2), pages 597-652.
    7. Lori Beaman & Dean Karlan & Bram Thuysbaert & Christopher Udry, 2013. "Profitability of Fertilizer: Experimental Evidence from Female Rice Farmers in Mali," American Economic Review, American Economic Association, vol. 103(3), pages 381-386, May.
    8. Sarah Baird & Joan Hamory Hicks & Michael Kremer & Edward Miguel, 2016. "Worms at Work: Long-run Impacts of a Child Health Investment," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 131(4), pages 1637-1680.
    9. Lori Beaman & Ariel BenYishay & Jeremy Magruder & Ahmed Mushfiq Mobarak, 2021. "Can Network Theory-Based Targeting Increase Technology Adoption?," American Economic Review, American Economic Association, vol. 111(6), pages 1918-1943, June.
    10. Jayne, Thomas S. & Mason, Nicole M. & Burke, William J. & Ariga, Joshua, 2018. "Review: Taking stock of Africa’s second-generation agricultural input subsidy programs," Food Policy, Elsevier, vol. 75(C), pages 1-14.
    11. Oriana Bandiera & Imran Rasul, 2006. "Social Networks and Technology Adoption in Northern Mozambique," Economic Journal, Royal Economic Society, vol. 116(514), pages 869-902, October.
    12. Foster, Andrew D & Rosenzweig, Mark R, 1995. "Learning by Doing and Learning from Others: Human Capital and Technical Change in Agriculture," Journal of Political Economy, University of Chicago Press, vol. 103(6), pages 1176-1209, December.
    13. Karthik Muralidharan & Paul Niehaus, 2017. "Experimentation at Scale," Journal of Economic Perspectives, American Economic Association, vol. 31(4), pages 103-124, Fall.
    14. Beaman, Lori & Dillon, Andrew, 2018. "Diffusion of agricultural information within social networks: Evidence on gender inequalities from Mali," Journal of Development Economics, Elsevier, vol. 133(C), pages 147-161.
    15. Munshi, Kaivan, 2004. "Social learning in a heterogeneous population: technology diffusion in the Indian Green Revolution," Journal of Development Economics, Elsevier, vol. 73(1), pages 185-213, February.
    16. Jacob Ricker-Gilbert & T. S. Jayne, 2017. "Estimating the Enduring Effects of Fertiliser Subsidies on Commercial Fertiliser Demand and Maize Production: Panel Data Evidence from Malawi," Journal of Agricultural Economics, Wiley Blackwell, vol. 68(1), pages 70-97, February.
    17. Magnan, Nicholas & Spielman, David J. & Lybbert, Travis J. & Gulati, Kajal, 2015. "Leveling with friends: Social networks and Indian farmers' demand for a technology with heterogeneous benefits," Journal of Development Economics, Elsevier, vol. 116(C), pages 223-251.
    18. Annemie Maertens & Christopher B. Barrett, 2013. "Measuring Social Networks' Effects on Agricultural Technology Adoption," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 95(2), pages 353-359.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Quentin Stoeffler & Michael Carter & Catherine Guirkinger & Wouter Gelade, 2022. "The Spillover Impact of Index Insurance on Agricultural Investment by Cotton Farmers in Burkina Faso," The World Bank Economic Review, World Bank, vol. 36(1), pages 114-140.
    2. Laston Petro Manja & Isatou A. Badjie, 2022. "The Welfare Effects of Formal and Informal Financial Access in the Gambia: A Comparative Assessment," SAGE Open, , vol. 12(1), pages 21582440221, March.
    3. Malacarne, J.G. & Paul, L.A., 2022. "Do the benefits of improved management practices to nutritional outcomes “dry up” in the presence of drought? Evidence from East Africa," Food Policy, Elsevier, vol. 113(C).
    4. Keiko Fukumori & Ayumi Arai & Tomoya Matsumoto, 2022. "Risk Management for Smallholder Farmers: An Empirical Study on the Adoption of Weather-Index Crop Insurance in Rural Kenya," Working Papers 230, JICA Research Institute.
    5. Finn Christensen, 2023. "Comparative Statics for Difference-in-Differences," Working Papers 2023-08, Towson University, Department of Economics, revised Nov 2023.
    6. Kate Ambler & Alan de Brauw & Mike Murphy, 2023. "Increasing the adoption of conservation agriculture: A framed field experiment in Northern Ghana," Agricultural Economics, International Association of Agricultural Economists, vol. 54(5), pages 742-756, September.
    7. Jérémie Gignoux & Karen Macours & Daniel Stein & Kelsey Wright, 2023. "Input subsidies, credit constraints, and expectations of future transfers: Evidence from Haiti," American Journal of Agricultural Economics, John Wiley & Sons, vol. 105(3), pages 809-835, May.
    8. Lipeng Li & Apurbo Sarkar & Xi Zhou & Xiuling Ding & Hua Li, 2022. "Influence and Action Mechanisms of Governmental Relations Embeddedness for Fostering Green Production Demonstration Household: Evidence from Shaanxi, Sichuan, and Anhui Province, China," IJERPH, MDPI, vol. 19(19), pages 1-25, September.
    9. Michelson,Hope Carolyn & Gourlay,Sydney & Wollburg,Philip Randolph, 2022. "Non-Labor Input Quality and Small Farms in Sub-Saharan Africa : A Review," Policy Research Working Paper Series 10092, The World Bank.
    10. Nauges, Céline & Bougherara, Douadia & Koussoubé, Estelle, 2021. "Fertilizer use and risk: New evidence from Sub-Saharan Africa," TSE Working Papers 21-1266, Toulouse School of Economics (TSE).
    11. Jérémie Gignoux & Karen Macours & Daniel Stein & Kelsey Wright, 2021. "Agricultural input subsidies, credit constraints and expectations of future transfers: evidence from Haiti," PSE Working Papers halshs-03131411, HAL.
    12. Kilugala Malimi, 2023. "Agricultural input subsidies, extension services, and farm labour productivity nexus: Evidence from maize farmers in Tanzania," Journal of Agricultural Economics, Wiley Blackwell, vol. 74(3), pages 874-898, September.
    13. Chowdhury, Shyamal & Satish, Varun & Sulaiman, Munshi & Sun, Yi, 2022. "Sooner rather than later: Social networks and technology adoption," Journal of Economic Behavior & Organization, Elsevier, vol. 203(C), pages 466-482.
    14. Mohamed Abouaziza, 2022. "Farmer constraints and relational contracts: evidence from agricultural value chains in East Africa," Economics PhD Theses 0122, Department of Economics, University of Sussex Business School.
    15. Che, Yuyuan & Feng, Hongli & Hennessy, David, 2021. "Assessing Peer Effects and Subsidy Impacts in Technology Adoption: Application to Grazing Management Choices with Farm Survey Data," 2021 Conference, August 17-31, 2021, Virtual 315123, International Association of Agricultural Economists.
    16. Brenneis, Karina & Irawan, Bambang & Wollni, Meike, 2023. "Promoting agricultural technologies with positive environmental effects: Evidence on tree planting in Indonesia," Ecological Economics, Elsevier, vol. 204(PB).
    17. Michelson, Hope & Gourlay, Sydney & Lybbert, Travis & Wollburg, Philip, 2023. "Review: Purchased agricultural input quality and small farms," Food Policy, Elsevier, vol. 116(C).
    18. D’Exelle, Ben & Verschoor, Arjan, 2023. "Village networks and entrepreneurial farming in Uganda," World Development, Elsevier, vol. 167(C).
    19. Michael Bernardi & Christa Hainz & Paulina Maier & Maria Waldinger, 2023. "Eine „Grüne Revolution“ in Subsahara-Afrika? Herausforderungen und Chancen," ifo Schnelldienst, ifo Institute - Leibniz Institute for Economic Research at the University of Munich, vol. 76(05), pages 29-33, May.
    20. Wiredu, Alexander Nimo & Manda, Julius & Feleke, Shiferaw & Asante, Bright Owusu & Savala, Canon Engoke & Kyei-Boahen, Stephen & Manyong, Victor & Alene, Arega, 2021. "Impacts of Quality Seeds of Improved Legume Varieties on Incomes and Poverty in Mozambique: An Ordered Choice Endogenous Switching Regression Analysis," 2021 Conference, August 17-31, 2021, Virtual 315294, International Association of Agricultural Economists.
    21. Raphael Soubeyran, 2021. "Pro-social Motivations, Externalities and Incentives," Working Papers hal-03212888, HAL.
    22. Michael Bernardi & Christa Hainz & Paulina Maier & Maria Waldinger, 2023. "A “Green Revolution” for Sub-Saharan Africa? Challenges and Opportunities," EconPol Policy Brief 54, ifo Institute - Leibniz Institute for Economic Research at the University of Munich.
    23. Fernando, A. Nilesh, 2021. "Seeking the treated: The impact of mobile extension on farmer information exchange in India," Journal of Development Economics, Elsevier, vol. 153(C).

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Kazushi Takahashi & Rie Muraoka & Keijiro Otsuka, 2020. "Technology adoption, impact, and extension in developing countries’ agriculture: A review of the recent literature," Agricultural Economics, International Association of Agricultural Economists, vol. 51(1), pages 31-45, January.
    2. Ram Fishman & Stephen C. Smith & Vida Bobic & Munshi Sulaiman, 2022. "Can Agricultural Extension and Input Support Be Discontinued? Evidence from a Randomized Phaseout in Uganda," The Review of Economics and Statistics, MIT Press, vol. 104(6), pages 1273-1288, November.
    3. Voors, Maarten & Demont, Matty & Bulte, Erwin, 2016. "New Experiments in Agriculture," African Journal of Agricultural and Resource Economics, African Association of Agricultural Economists, vol. 11(1), pages 1-7, March.
    4. Matsumoto, Tomoya, 2014. "Disseminating new farming practices among small scale farmers: An experimental intervention in Uganda," Journal of the Japanese and International Economies, Elsevier, vol. 33(C), pages 43-74.
    5. B Kelsey Jack, "undated". "Market Inefficiencies and the Adoption of Agricultural Technologies in Developing Countries," CID Working Papers 50, Center for International Development at Harvard University.
    6. Emerick, Kyle & Kelley, Erin & De Janvry, Alain & Sadoulet, Elisabeth, 2019. "Endogenous Information Sharing and the Gains from Using Network Information to Maximize Technology Adoption," CEPR Discussion Papers 13507, C.E.P.R. Discussion Papers.
    7. Ariel BenYishay & A. Mushfiq Mobarak, 2014. "Social Learning and Communication," NBER Working Papers 20139, National Bureau of Economic Research, Inc.
    8. Arslan, Cansın & Wollni, Meike & Oduol, Judith & Hughes, Karl, 2022. "Who communicates the information matters for technology adoption," World Development, Elsevier, vol. 158(C).
    9. Michelson, Hope & Fairbairn, Anna & Ellison, Brenna & Maertens, Annemie & Manyong, Victor, 2021. "Misperceived quality: Fertilizer in Tanzania," Journal of Development Economics, Elsevier, vol. 148(C).
    10. Ayalew, Hailemariam & Chamberlin, Jordan & Newman, Carol, 2022. "Site-specific agronomic information and technology adoption: A field experiment from Ethiopia," Journal of Development Economics, Elsevier, vol. 156(C).
    11. Fishman, Ram & Smith, Stephen C. & Bobic, Vida & Sulaiman, Munshi, 2017. "How Sustainable Are Benefits from Extension for Smallholder Farmers? Evidence from a Randomized Phase-Out of the BRAC Program in Uganda," IZA Discussion Papers 10641, Institute of Labor Economics (IZA).
    12. Andrew D. Foster & Mark R. Rosenzweig, 2010. "Microeconomics of Technology Adoption," Annual Review of Economics, Annual Reviews, vol. 2(1), pages 395-424, September.
    13. David Atkin & Azam Chaudhry & Shamyla Chaudry & Amit K. Khandelwal & Eric Verhoogen, 2017. "Organizational Barriers to Technology Adoption: Evidence from Soccer-Ball Producers in Pakistan," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 132(3), pages 1101-1164.
    14. Beaman, Lori & Dillon, Andrew, 2018. "Diffusion of agricultural information within social networks: Evidence on gender inequalities from Mali," Journal of Development Economics, Elsevier, vol. 133(C), pages 147-161.
    15. Anna Folke Larsen, 2019. "When knowledgeable neighbors also share seedlings: diffusion of banana cultivation in Tanzania," Agricultural Economics, International Association of Agricultural Economists, vol. 50(1), pages 51-65, January.
    16. Shikuku, K.M., 2018. "Information exchange links, knowledge exposure, and adoption of agricultural technologies in Northern Uganda," 2018 Conference, July 28-August 2, 2018, Vancouver, British Columbia 275974, International Association of Agricultural Economists.
    17. Dominik Naeher, 2022. "Technology Adoption Under Costly Information Processing," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 63(2), pages 699-753, May.
    18. Lee, Guenwoo & Suzuki, Aya & Nam, Vu Hoang, 2019. "Effect of network-based targeting on the diffusion of good aquaculture practices among shrimp producers in Vietnam," World Development, Elsevier, vol. 124(C), pages 1-1.
    19. Annemie Maertens & Hope Michelson & Vesall Nourani, 2021. "How Do Farmers Learn from Extension Services? Evidence from Malawi," American Journal of Agricultural Economics, John Wiley & Sons, vol. 103(2), pages 569-595, March.
    20. Bloem, Jeffrey R. & Liverpool-Tasie, Saweda & Adjognon, Serge G. & Dillon, Andrew, 2022. "Private Sector Promotion of Climate-Smart Technologies: Experimental Evidence from Nigeria," 2022 Annual Meeting, July 31-August 2, Anaheim, California 322152, Agricultural and Applied Economics Association.

    More about this item

    JEL classification:

    • O13 - Economic Development, Innovation, Technological Change, and Growth - - Economic Development - - - Agriculture; Natural Resources; Environment; Other Primary Products
    • Q12 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Micro Analysis of Farm Firms, Farm Households, and Farm Input Markets
    • Q16 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - R&D; Agricultural Technology; Biofuels; Agricultural Extension Services
    • Q18 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Agricultural Policy; Food Policy; Animal Welfare Policy

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:aea:aejapp:v:13:y:2021:i:2:p:206-29. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Michael P. Albert (email available below). General contact details of provider: https://edirc.repec.org/data/aeaaaea.html .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.