Ouellette P and V Vierstraete (2004). “Technological Change and Efficiency in the Presence of Quasi-Fixed Inputs: A DEA Application to the Hospital Sector.” EJOR 154(3): 755-763.

Orea L (2002). “Parametric Decomposition of a Generalized Malmquist Productivity Index.” JPA 18(1): 5-22.

Oren MN and T Alemdar (2006). “Technical Efficiency Analysis of Tobacco Farming in Southeastern Anatolia.” Turkish J Agriculture and Forestry 30(2): 165-172.

Orme C and P Smith (1996). “The Potential for Endogeneity Bias in Data Envelopment Analysis.” JORS 47(1): 73-83.

Ormerod R (1996). “On the Nature of or-Entering the Fray.” JORS 47(1): 1-17.

Oron G, A Bick, L Gillerman and Y Manor (2004). “Data Envelopment Analysis (DEA) for Assessment of Cryptosporidium and Giardia Removal by Membrane Processes.? in Proceedings of the World Water and Environmetal Resources Congress: Critical Transitions in Water and Environmetal Resources Management, IEEE: 3257-3265.

Osei D, S d’Almeida, MO George, JM Kirigia, AO Mensah and LH Kainyu (2005). “Technical Efficiency of Public District Hospitals and Health Centres in Ghana: A Pilot Study.” Cost Efficiency Resource Allocation 3: 9.

Osiewalski J and MFJ Steel (1998). “Numerical Tools for the Bayesian Analysis of Stochastic Frontier Models.” JPA 10(1): 103-117.

Ostroff C and N Schmitt (1993). “Configurations of Organizational Effectiveness and Efficiency.” Academy of Management Journal 36(6): 1345-1361.

Otsuki T, IW Hardie and EJ Reis (2002). “The Implication of Property Rights for Joint Agriculture-Timber Productivity in the Brazilian Amazon.” Environment J Development Economics 7: 299-323.