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Table 1 Summary of the studies which examined the relationship between off-farm income and technical efficiency

From: Impact of off-farm activities on technical efficiency: evidence from maize producers of eastern Ethiopia

Authors Country Type of crop Estimation technique Relationship between TE and off-farm activities
Tijani 2006 Nigeria Rice SFA +
Haji 2007 Ethiopia Vegetable DEA +
Pfeiffer et al. 2009 Mexico Agriculture Combined SFA with instrumental variable +
Kilic et al. 2009 Albania Agriculture Combined instrumental variables, Tobit, and SFA No systematic relationship
Bozoğlu and Ceyhan 2007 Turkey Vegetable SFA No systematic relationship
Lien et al. 2010 Norway Agriculture SFA No systematic relationship
Feng et al. 2010 China Rice Instrumental variable No systematic relationship
Bojnec and Fertő 2013 Slovenia Agriculture SFA +
Chang and Wen 2011 Taiwan Rice SFA
Lien et al. 2010 Norwegian Grain SFA No systematic relationship
Yang et al. 2016 China Agriculture SFA No systematic relationship
Zhang et al. 2016 China Agriculture Combined SFA with instrumental variable +
Abebe 2014 Ethiopia Agriculture Combined SFA with instrumental variable +
Chavas et al. 2005 Gambia Agriculture Combined DEA with Tobit No systematic relationship
Babatunde 2013 Nigeria Agriculture Combined SFA with instrumental variable No systematic relationship
Larochelle and Alwang 2013 Bolivian Potato SFA
Goodwin and Mishra 2004 USA Agriculture Simultaneous equation