Aigner D, Lovell CAK, Schmidt P (1977). Formulation and estimation of stochastic production function models. J. Econom. 6(1):21-37.
Crossref

Ahmed B, Haji J, Geta E (2013). Analysis of Farm Households' Technical Efficiency in Production of Smallholder Farmers: The Case of Girawa District, Ethiopia. Am.-Eur. J. Agric. Environ. Sci. 13(12): 1615-1621.

Alene DA, Manyong MV, Gockowski J (2006). The production efficiency of intercropping annual and perennial crops in Southern Ethiopia: A comparison of distance functions and production frontier. ELSVIER J. Agric. Syst. 91:57-70.
Crossref

Alene DA, Zeller M (2005). Technology adoption and farmer efficiency in multiple crops production in eastern Ethiopia: A comparison of parametric and non-parametric distance functions. Agric. Econ. Rev. 6(1):5-17.

Asefa S (2012). Who is technically efficient in Crop Production in Tigray Region, Ethiopia? Stochastic Frontier Approach. Glob. Adv. Res. J. Agric. Sci. 1(7):191-200.

Asogwa BC, Umeh J, Penda ST (2012). Technical efficiency analysis of smallholder farmers in rural and periurban areas of Nigeria. J. Hum. Ecol. 37(1):57-66.

Battese GE, Coelli TJ (1995). A model for technical inefficiency effect in stochastic frontier production for panel data. Empir. Econ. 20:325-332. 
Crossref

Beshir H, Emana B, Kassa B, Haji J (2012). Economic efficiency of mixed crop-livestock production system in the North eastern highlands of Ethiopia: the stochastic frontier approach. J. Agric. Econ. Dev. 1(1):10-20.

Bezabeh E, Haregewoin T, Hailegiorgis D, Daniel F, Belay B (2014). Change And Growth Rate Analysis In Area, Yield And Production Of Wheat In Ethiopia. Int. J. Dev. Res. 4(10):1994-1995.

Chiona S, Kalinda Th, Tembo G (2014). Stochastic Frontier Analysis of the Technical Efficiency of Smallholder Maize Farmers in Central Province, Zambia. J. Agric. Sci. 6(10):108-118.
Crossref

CSA (Central Statistical Agency) (2013). Area and Production of major crops: Statistical Bulletin, No. 532.

CSA (Central Statistical Agency) (2010). Area and Production of major crops: Statistical Bulletin, Vol. 1.

Daniel S, Bravo –Ureta BE, Quiroga RE (2008). Technical efficiency among peasant farmers participating in natural resource management in Central America. J. Agric. Econ. 60(1):202-219.

Debebe S, Haji J, Goshu D, Edriss KA (2015). Technical, allocative, and economic efficiency among smallholder maize farmers in Southwestern Ethiopia: Parametric approach. J. Dev. Agric. Econ. 7(8):282-291.
Crossref

Dlamini IS, Masuku BM, Rugambisa IS (2012). Technical efficiency of maize production in Swaziland: A stochastic frontier approach. Afr. J. Agric. Res. 7(42):5628-5636.
Crossref

EAAPP (East Africa Agricultural Productivity Program) (2009). A report on Integrated safeguards Datasheet Appraisal Stage. No. 47820. Retrieved from 

View

Gebregziabher G, Namara RE, Holden S (2012). Technical Efficiency of Irrigated and Rain-Fed Smallholder Agriculture in Tigray, Ethiopia: A Comparative Stochastic Frontier Production Function Analysis. Quart. J. Int. Agric. 51(3):203-226.

Geta E, Bogale A, Kassa B, Elias E (2013). Productivity and efficiency analysis of smallholder maize producers in Southern Ethiopia. J. Hum. Ecol. 41(1):67-75.

Giannakas K, Sctoney R, Tzouvelkas V (2001). Technical efficiency, technological change and output growth of wheat farms in saskatchwan. Can. J. Agric. Econ. 49:135-152.
Crossref

Haji J (2006). Production Efficiency of Smallholders' Vegetable-dominated Mixed Farming System in Eastern Ethiopia: A Non-Parametric Approach. J. Afr. Econ. 16(1):1-27.
Crossref

Jaime M, Salazar A (2011). Participation in organization, technical efficiency and territorial differences, a study of small wheat farmers in Chile. J. Agric. 71(1):104-113.
Crossref

Kamruzzaman M, Mohammad HI (2008). Technical efficiency of wheat growers in some selected sites of Dinajpur district of Bangladesh. Bang. J. Agric. Res. 33(3):363-373.
Crossref

Kariuk DK, Ritho CN, Munei K (2008). Analysis of the effect of land on technical efficiency of smallholder crop production in Kenya. A paper presented on International Research on Food Security, Tropentag.

Kebede K, Adenew B (2011). Analysis of Technical Efficiency: Lessons and Implications for Wheat Producing Commercial Farms in Ethiopia. J. Econ. Sustain. Dev. 2(8):39-47.

Kibaara BW, Kavoi MM (2012). Application of stochastic frontier approach model to assess technical efficiency in Kenya's maize production. JAGST 14(1).

Kodde DA, Palm CF (1986). Wald criteria for jointly testing equality and inequality restrictions. Econometrica 54(5):1243-1248.
Crossref

Mazumder R, Gupta M (2013). Technical efficiency and its determinants in backward agriculture: The case of paddy farmers of Hailakandi district of Assam. J. Reg. Dev. Plan. 2(1):35-53.

Meeusen W, Broeck JV (1977). Efficiency estimation from Cobb-Douglas production functions with composed error. Int. Econ. Rev. 18:435-444.
Crossref

MoFED (Ministry of Finance and Economic Development) (2010). Growth and Transformation Plan (GTP) 2010/11-2014/15 Draft

Mohammed H, Hassan F, Mwangi W, Belay K (2000). Factors influencing technical efficiencies of barley production in Assasa district of south-eastern Ethiopia. Ethiop. J. Agric. Econ. 4(1):1-21.

Mussa CE, Obare AD, Bogale A, Simtowe PF (2012). Analysis of Resource Use Efficiency in Smallholder Mixed Crop-Livestock Agricultural Systems: Empirical Evidence from the Central Highlands of Ethiopia. Dev. Ctry. Stud. 2(9):30-40.

Schneider K, Anderson L (2010). Yield gap and productivity potential in Ethiopian Agriculture: Staple grains and pulses. EPAR Brief No. 98.

Sharp K (2003). Measuring destitution: Integrated qualitative and quantitative approaches in the analysis of survey data. IDS working paper 217.

Simonyan JB, Umoren BD, Okeye BC (2011). Gender differentials in technical efficiency among maize farmers in Essien Odimolocal government area, Nigeria. Int. J. Econ. Manage. Sci. 1(2):17-23.

Statistics Canada (2010). Survey methods and practices. 12-587-X. Retrieved from 

View

Taffesse AS, Dorosh P, Gemessa AS (2012). Food and Agriculture in Ethiopia:Progress and Policy Challenges, University of Pennsylvania Press: Philadelphia, chap. Crop Production in Ethiopia: Regional Patterns and Trends. pp. 53-83.

Tan S, Kuyvenhove A, Qu F (2010). Impact of land fragmentation on rice producer's technical efficiency in South east china. NJAS-Wageningen. J. Life Sci. 57:117-123.

Wassie SB (2014). Technical efficiency of major crops in Ethiopia: Stochastic frontier model. Acad. J. Agric. Res. 2(6):147-153.

World Bank (2007). World development report: Agriculture for development. Washington DC.

WoRLA (Welmera Woreda Office of Rural Land Administration) (2011). Land use and distribution document (unpublished).

WoA (Welmera Woreda Office of agriculture) (2012). Socio-economic profile of Welmera Woreda and crop assessment report (unpublished).

Yami M, Solomon T, Begna B, Fufa F, Alemu T, Alemu D (2013). Sources of technical inefficiency of smallholder wheat farmers in selected water-logged areas of Ethiopia: A translog production function approach. Afr. J. Agric. Res. 8(29):3930-3940.