A. Abadie, D. Drukker, J. L. Herr, and G. W. Imbens, Implementing matching estimators for average treatment eects in Stata, Stata Journal, vol.4, issue.3, p.290311, 2004.

A. Abadie and G. W. Imbens, Large Sample Properties of Matching Estimators for Average Treatment Eects, Econometrica, vol.74, issue.1, p.235267, 2006.

J. C. Aker and I. M. Mbiti, Mobile Phones and Economic Development in Africa, The Journal of Economic Perspectives, vol.24, issue.3, p.207232, 2010.

R. Al-hassan, A. Dorward, and C. Poulton, Improving Access to Maize Marketing Opportunities in Remote Areas of Ghana, Discussion paper, 1999.

L. M. Ausubel, P. Cramton, and R. J. Deneckere, of Handbook of Game Theory with Economic Applications, Handbook of Game Theory with Economic Applications, vol.3, p.18971945, 2002.

S. O. Becker and A. Ichino, Estimation of average treatment eects based on propensity scores, Stata Journal, vol.2, issue.4, p.358377, 2002.

M. F. Bellemare and C. B. Barrett, An Ordered Tobit Model of Market Participation: Evidence from Kenya and Ethiopia, American Journal of Agricultural Economics, vol.88, issue.2, p.324337, 2006.

P. Dorosh, H. Wang, L. You, and E. Schmidt, Crop production and road connectivity in Sub-Saharan Africa : a spatial analysis, vol.5385, 2010.

M. Fafchamps and R. V. Hill, Price Transmission and Trader Entry in Domestic Commodity Markets, American Journal of Agricultural Economics, vol.87, issue.3, p.729766, 2005.

M. Fafchamps and B. Minten, Impact of SMS-Based Agricultural Information on Indian Farmers, The World Bank Economic Review, 2012.

S. J. Goetz, A Selectivity Model of Household Food Marketing Behavior in Sub-Saharan Africa, American Journal of Agricultural Economics, vol.74, issue.2, p.444452, 1992.

A. Goyal, Information, Direct Access to Farmers, and Rural Market Performance in Central India, American Economic Journal: Applied Economics, vol.2, issue.3, p.2245, 2010.

A. Goyal and C. González-velosa, Improving Agricultural Productivity and Market Eciency in Latin America and The Caribbean: How ICTs can Make a Dierence?, Lcssd occasional paper series on food prices, 2012.

J. J. Heckman, H. Ichimura, and P. E. Todd, Matching as an Econometric Evaluation Estimator: Evidence from Evaluating a Job Training Programme, Review of Economic Studies, vol.64, issue.4, p.60554, 1997.

G. W. Imbens, Nonparametric Estimation of Average Treatment Eects Under Exogeneity: A Review, The Review of Economics and Statistics, vol.86, issue.1, p.429, 2004.

R. Jensen, Market Performance, and Welfare in the South Indian Fisheries Sector, The Digital Provide: Information (Technology), vol.122, p.924, 2007.

R. T. Jensen, Information, eciency, and welfare in agricultural markets, Agricultural Economics, issue.s1, p.203216, 2010.

N. Karbo and W. Agyare, Crop-livestock systems in northern Ghana, in Improving Crop-Livestock Systems in the Dry Savannas of West and Central Africa, p.112126, 2002.

N. Key, E. Sadoulet, and A. D. Janvry, Transactions Costs and Agricultural Household Supply Response, vol.82, p.245259, 2000.

E. Leuven and B. Sianesi, PSMATCH2: Stata module to perform full Mahalanobis and propensity score matching, common support graphing, and covariate imbalance testing, Statistical Software Components, 2003.

. Mofa, Discussion paper, Ministry of Food and Agriculture (MoFA) -Statistics, Agriculture in Ghana: Facts and gures 2010, 2011.

G. Moschini and D. A. Hennessy, Chapter 2 Uncertainty, risk aversion, and risk management for agricultural producers, 2001.

. Rausser, Part A of Handbook of Agricultural Economics, vol.1, pp.88-153

P. R. Mérel, R. J. Sexton, and A. Suzuki, Optimal Investment in Transportation Infrastructure When Middlemen Have Market Power: A Developing-Country Analysis, vol.91, p.462476, 2009.

P. R. Rosenbaum and D. B. Rubin, The Central Role of the Propensity Score in Observational Studies for Causal Eects, Biometrika, vol.70, issue.1, p.4155, 1983.

D. B. Rubin, Bayesian Inference for Causal Eects: The Role of Randomization, The Annals of Statistics, vol.6, issue.1, p.3458, 1978.

A. Rubinstein, Choice of conjectures in a bargaining game with incomplete informationchap, vol.6, p.99114, 1985.

J. Sobel and I. Takahashi, A Multistage Model of Bargaining, Review of Economic Studies, vol.50, issue.3, p.41126, 1983.

J. Svensson and D. Yanagizawa, Getting Prices Right: The Impact of the Market Information Service in Uganda, Journal of the European Economic Association, vol.7, issue.2-3, p.435445, 2009.

J. Svensson and D. Yanagizawa-drott, Tuning in the Market Signal: The Impact of Market Price Information on Agricultural Outcomes, 2010.

S. Teravaninthorn and G. Raballand, Transport Prices and Costs in Africa : A Review of the Main International Corridors, Discussion paper, The International Bank for Reconstruction and Development / The World Bank, 2009.

P. E. Todd, Evaluating Social Programs with Endogenous Program Placement and Selection of the Treated, vol.4, p.38473894, 2008.

, Using ICT to Provide Agriculture Market Price Information in Africa, Discussion paper, Fostering Agriculture Competitiveness Employing Information Communication Technologies, USAID, 2010.

, The Market for Maize, Rice, Soy, and Warehousing in Northern Ghana, Discussion paper, the United States Agency for International Development, USAID, 2012.

W. Bank, Eastern Africa : A Study of the Regional Maize Market and Marketing Costs, Discussion paper, The International Bank for Reconstruction and Development / The World Bank, 2009.