What Do Farmers Financially Lose if they Fail to use Improved Seeds? Some Econometric Results for Wheat and Implications for Agricultural Extension Policy in Ethiopia. EJE [Internet]. 2006 Nov. 1 [cited 2026 Apr. 18];12(2):60-81. Available from: http://ethiopianjournalofeconomics.org/index.php/EJE/article/view/367