Decision Support Accepted Manuscript Productivity and Efficiency Estimation: A Semiparametric Stochastic Cost Frontier Approach Kai Sun, Subal C. Kumbhakar, Ragnar Tveter ˚ as PII: S0377-2217(15)00196-4 DOI: 10.1016/j.ejor.2015.03.003 Reference: EOR 12824 To appear in: European Journal of Operational Research Received date: 13 May 2014 Revised date: 10 November 2014 Accepted date: 2 March 2015 Please cite this article as: Kai Sun, Subal C. Kumbhakar, Ragnar Tveter ˚ as, Productivity and Efficiency Estimation: A Semiparametric Stochastic Cost Frontier Approach, European Journal of Operational Research (2015), doi: 10.1016/j.ejor.2015.03.003 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.