The most appropriate DEA models are those that are capable of measuring the conversion efficiency of
initial input drivers into website quality (intermediate) while website quality converts into ultimate profitability.
The two-stage DEA model, developed by Seiford and Zhu (1999) [20] to measure the profitability and
marketability of 55 US commercial banks, is called as the standard two-stage DEA model. A common feature
in the standard two-stage model is that the efficiency scores of various stages are independently calculated
under CRS and VRS model. The following is the overall efficiency of the standard DEA model: