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Does Free Distribution Of Mosquito Nets Affect Subsidized Net Sales? Evidence From A Nationwide Campaign In Tanzania

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  • Chris D. Gingrich
  • Kara Hanson
  • Vianey Rweyendela
  • Timothy A. Piper

Abstract

Randomized controlled trials (RCTs) are increasingly popular for assessing development programmes. This study investigates the validity of extrapolating RCT results to large‐scale programmes, using the example of the national bed net subsidy programme in Tanzania that later added a free distribution campaign. Although the RCTs suggest steady sales of nets throughout, an interrupted time series model reveals a 34 per cent monthly decline immediately after the campaign compared to ‘normal’ sales. After 6 months, the total unsold nets reached 45 per cent of normal sales, or 347 000 nets nationwide. We hypothesize that these differences in results arise from various scale and spillover effects. Copyright © 2013 John Wiley & Sons, Ltd.

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  • Chris D. Gingrich & Kara Hanson & Vianey Rweyendela & Timothy A. Piper, 2014. "Does Free Distribution Of Mosquito Nets Affect Subsidized Net Sales? Evidence From A Nationwide Campaign In Tanzania," Journal of International Development, John Wiley & Sons, Ltd., vol. 26(6), pages 749-762, August.
    • Handle: RePEc:wly:jintdv:v:26:y:2014:i:6:p:749-762
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    Cited by:

    1. Luke Harman & Catherine Goodman & Andrew Dorward, 2018. "The impact of a mosquito net voucher subsidy programme on incremental ownership: The case of the Tanzania National Voucher Scheme," Health Economics, John Wiley & Sons, Ltd., vol. 27(3), pages 480-492, March.
    2. Christian P. Schneider & Edeltraud Guenther & Dominik Möst, 2024. "International technology transfer to Africa in light of the SDGs: What do we know about the barriers?," Journal of International Development, John Wiley & Sons, Ltd., vol. 36(4), pages 2129-2151, May.

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