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Misperceived Quality: Fertilizer in Tanzania

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  • Michelson, Hope
  • Ellison, Brenna
  • Fairbairn, Anna
  • Maertens, Annemie
  • Manyong, Victor
Abstract
Fertilizer use remains below recommended rates in most of Sub-Saharan Africa, contributing to poor crop yields and poverty. Farmers voice suspicion that available fertilizer is often adulterated, but these concerns are not backed by reliable evidence. In fact, an insight from industry but absent from academic literature is that profitable fertilizer adulteration is difficult. We surveyed all fertilizer sellers in Morogoro Region, Tanzania and tested 633 samples of their fertilizer. We also conducted a willingness-to-pay assessment with farmers. We find that fertilizers meet nutrient standards but that belief of rampant product adulteration persists among farmers. We find evidence of a quality inference problem in the market: 25% of fertilizer has deteriorated in observable ways and farmers rely on these observable attributes to (incorrectly) assess unobservable nutrient quality. We show that this misperception likely reduces technology adoption beyond the effect of nutrient quality being unobservable.

Suggested Citation

  • Michelson, Hope & Ellison, Brenna & Fairbairn, Anna & Maertens, Annemie & Manyong, Victor, 2018. "Misperceived Quality: Fertilizer in Tanzania," MPRA Paper 90798, University Library of Munich, Germany.
    • Handle: RePEc:pra:mprapa:90798
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    More about this item

    Keywords

    agriculture; fertilizer; input adoption; technology adoption; quality; Sub-Saharan Africa;
    All these keywords.

    JEL classification:

    • D8 - Microeconomics - - Information, Knowledge, and Uncertainty
    • D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information; Mechanism Design
    • O1 - Economic Development, Innovation, Technological Change, and Growth - - Economic Development
    • O10 - Economic Development, Innovation, Technological Change, and Growth - - Economic Development - - - General
    • 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

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