01467nam a2200193 a 450000100080000000500110000800800410001910000220006024501710008226001890025330000150044252006830045765000180114065300260115865300240118465300250120870000230123370000170125619807472014-02-20       2013    bl uuuu     u00u1 u    #d1 aSOUZA, G. da S. e  aStochastic frontier approach to agricultural production including technical effectsbthe brazilian agricultural censures of 1995-1996 and 2006.h[electronic resource]  aIn: SIMPÓSIO BRASILEIRO DE PESQUISA OPERACIONAL, 45., 2013, Natal. "A Pesquisa Operacional na busca de eficiência nos serviços publicos e/ou privados". Rio de Janeiro: Sobrapoc2013  ap. 686-698  aIn this paper we analyze the impact of Embrapa’s research on the technical efficiencies of Brazilian farmers, particularly the poor. Using a stochastic frontier approach, we estimate a production function to obtain not only the technica efficiencies but also the elasticities of the key inputs. Our results indicate that Embrapa has generally had a positive effect on technical efficiencies, but there are still challenges ahead for Embrapa. Key among these challenges is the dissemination of its technology, which seems to be predominantly adopted by wealthier farmers. The low or absent use of modern inputs by poor farmers is highly detrimental of their ability to succeed.  arural poverty  aBrazilian agriculture  aEmbrapa's researcyh  aStochastic frontiers1 aALVES, E. R. de A.1 aGOMES, E. G.