Dear All, Nice to talk to you. My name is Atsuo Hashimoto. I am studying DEA in Japan. Also I'm teaching commercial at high school. Today, I send you this mail to ask you one thing for my further study. I'd like to know the way to find efficiency of NDRS' model of DEA under input orientated and output orientated using "R program". I'd like you to show me. I know you are very busy and it may be impolite to ask you such thing, however, it's extremely important for me to get this thing to proceed my study. I am waiting for good answer from you. Thank you very much. Sincerely yours, Atsuo Hashimoto Munekana76@ybb.ne.jp [[alternative HTML version deleted]]