My research lies at the intersection of Agricultural Economics,  International Development, and Trade.  In my ongoing dissertation, I assess the determinants and impacts of sustainable agricultural intensification and the transformation of agriculture and rural spaces in Africa. I'm an applied economist using micro-econometrics, time series, and computable general equilibrium models to analyze issues related to production, transformation, and commercialization of agricultural products. Below are my completed and ongoing research papers.

Dissertation Research (ongoing) : Essays in Input Intensification, Urbanization, and the Transformation of African Agriculture and Rural spaces
  1. “Spillover effects of fertilizer subsidies on the adoption of other modern inputs in Burkina Faso” (Job Market Paper)

    To address the dual problem of limited physical and economic access to modern agricultural inputs, the Government of Burkina Faso initiates a program in 2008 to provide mineral fertilizer to farmers at a 15%-30% discounted price. The program focuses essentially on mineral fertilizer, targets strategic food crops - maize and rice-, and is universal. Exploiting this unique feature, we assess the spillover effects of subsidizing only one agricultural input on the use of other modern inputs in African agriculture. The empirical analysis uses panel data to test the hypothesis that farmers may be using fertilizer as a substitute for -rather than a complement to- other technologies. It addresses the issues of simultaneity in inputs use decisions, unobserved heterogeneity, and endogeneity using multivariate probit with control function instrumental variable and correlated random effects. The results confirm the endogeneity of the access to subsidies and the simultaneity of input use decisions. We find that fertilizer subsidies increase mineral fertilizer use, crowds in the use of hybrid seeds and crop protection chemicals, but crowds out the use of organic manure. The results suggest that subsidizing mineral fertilizer needs to be in conjunction with measures to promote organic manure for sustainable input intensification.

  2. “Land rental, farm investment, productivity, and efficiency in Burkina Faso” (Dissertation Essay) with Yoko Kusunose and Veronique Theriault

    Rural land rental markets continue to develop progressively in Sub-Saharan African as a medium for land transfer among households. We use nationally representative household panel to identify the determinants of farmer’s participation in these markets in Burkina Faso and assess its impact on farm investment and production efficiency. Using a double hurdle model, we find that household’s farming ability and commitment to agriculture is positively correlated with the likelihood to rent in land and the amount of land rented in. This result corroborates previous findings in both Africa and outside that land rental markets transfer land resource from less talented and committed farmers to the more able ones. We extend the analysis using a multivariable probit regression and the correlated random effects approach to account for unobserved household heterogeneity and potential endogeneity. We find that input use decisions are made jointly, and farmer’s participation in land rental markets has a positive effect on the likelihood to use crop protection chemicals. The effect on the use mineral fertilizer and organic manure are positive but weak, and there is no significant effect on the use hybrid seeds or hired labor. However, using stochastic production frontier analysis, we find that land renters are better farm managers and experience fewer inefficiencies in their production processes. Taken together, our findings highlight the mixed effects of policies that foster the development of land rental markets in Burkina Faso on input intensification. Much of the gains from these policies might be essentially in term of efficiency and not widespread adoption of modern agricultural inputs.                                                                                                                                                                  n
  3. “The productivity and welfare effects of increasing use of crop protecting chemicals in African agriculture” (in progress)

  4. “Spatial urban development and transformation of African agriculture: A view from space” (in progress) with Christopher Boone Funded by STAARS fellowship
Journal Articles
  1. Destination or Distraction? Querying the Linkage between Off-farm Income and Farm Investments in Kenya” with Melinda Smale, Yoko Kusunose, and Mary Mathenge. Journal of African Economies, 2016. 25 (3): 388-41
  2. On poverty and persistence of poverty in Benin” with Katia Jossa-Jouable and Rose Fiamohe. Journal of Economic Studies, 2016, 43(4): 661 - 676
  3. Geographical orientation of export in the manufacturing sector in sub-Sahara Africa”. Global Economy Journal, 2015, 15 (3) 337–351
  4. Transmission of rice prices from Thailand into West African markets: The case of Benin, Mali, and Senegal” with Rose Fiamohe, Ibrahim Bamba, Aliou Diagne, and Eyram Amovin-Assagba. Journal of African Business, 2015, 16(1-2): 128-143
  5. Price transmission analysis using threshold models: an application to local rice markets in Benin and Mali” with Fiamohe, Ibrahim Bamba, Aliou Diagne. Food security, 2013. 5(3), 427-438

Book Chapters
  1. Farmer Perceptions of the Biophysical Constraints to Rice Production in Sub-Saharan Africa, and Potential Impact of Research”. (with Aliou Diagne, Eyram Amovin-Assagba, Marco C.S. Wopereis and Kazuki Saito), chapter in Realizing Africa’s Rice Promise. Wopereis, M.C.S., Johnson, D.E., Ahmadi N., Tollens, E. and Jalloh, A., CABI Publishing, October 2013
  2. Impact of Rice Research on Income, Poverty and Food Security in Africa: An Ex-ante Analysis”. (with Aliou Diagne, Marco C.S. Wopereis, Kazuki Saito and Papa Abdoulaye Seck) chapter in Realizing Africa’s Rice Promise. Wopereis, M.C.S., Johnson, D.E., Ahmadi N., Tollens, E. and Jalloh, A., CABI Publishing, October 2013

Working Papers and Work in progress

  1. “Cross-markets transmission of price and price volatility in international grain markets” (under review) with Michael Reed 
  2.  “Foreign aid effectiveness in African economies: evidence from a threshold panel” with Romuald Anago (Under review and also UNU WIDER Working Paper 15/2014)
  3. Heterogeneous welfare effects of cotton pricing on households in Benin” with Anne Floquet and Epiphane Adjovi (Under Review and also UNCTAD-Vi working paper)
  4. “Distributional impact of Nerica adoption on farmer expenditure in Benin: Quantile Treatment Effect Estimation” with Aliou Diagne, Patrice Adegbola, and Florent Kinkingninhoue (Under Review)
  5. “Progress toward the Sustainable Development Goal on Poverty: Assessing the effect of income growth on the exit time out of poverty in Benin” (Revise and Resubmit Sustainable Development)
  6. “Altruism or exchange? A quest into the motives of inter-household private transfers in Burkina Faso” with Nicholas Ponty and Ignace Kamga (MSc Thesis- Revised and resubmit International Journal of Socio-Economics)
  7.  “Institutional change, industrialization and structural change out of agriculture” with Michael Reed and Yoko Kusunose
  8. Assessing the performance of food co‐ops in the US” with Ani Katchova and Timothy A. Woods
  9. “The Dynamic Implication of Agricultural Research and Development Investment for Economic Development” with Michael Reed
  10. “Are non-food cash crops and food crops substitute or complement? Evidence from sub-national panel in Benin”
  11. “Evaluation of the effects of economic policies on informal sector performance and poverty in Cameroon: a Computable General Equilibrium model analysis” (MSc Thesis) with Willy Ndjana, Erith Nghogue and Robert Ngonthe
  12. “Do Bilateral Investment Treaties promote or restrict large-scale Land Acquisition in developing countries
  13. “Assessing policy coherence for development: Spillover effects of OECD policies on food security in Tanzania” with Fabien Tondel, Solomon, Baregu, Festo Maro, Abel Songole, and Brecht Lein