J. Gerami - Department of Mathematics, Shiraz Branch, Islamic Azad University, Shiraz, Iran.
M. R. Mozaffari - Department of Mathematics, Shiraz Branch, Islamic Azad University, Shiraz, Iran.
P. Kamyab - Department of Mathematics, Guilan Science and Research Branch, Islamic Azad University, Rasht, Iran.

In this paper, we develop the revenue and cost efficiency models based on the FDH model. In the following, we will develop the proposed models for the two-stage network structure and obtain the desired scores of inputs and outputs by considering the input and output prices. An algorithm for measuring the revenue and cost efficiency is presented based on the ratio of inputs and outputs.

DEA, Two stage Network, Efficiency, Free disposal hull, Airlines