indicate that the sample is homogeneous, since t he coefficient of variation remains stable over time. The coefficient of variation, represented by the? Ој /, is included in a narrow interval: [1.25; 2.24] over the studied period. The interval is [1.28; 2.15] for 2005, [1.30; 2.15] for 2006, [1.19; 1.96 ] for 2007 and [1.01; 2.25] for 2008. Note that over the four studied years, the level of dispersion is significantly low for staff costs and operating costs (excluding staff costs). The highest level of dispersion was for the fixed assets. The other variables are characterized by an average level of dispersion. A two-stage approach was used to achieve the two objectives outlined above, ie the evaluation of the performance of Islamic banks operating in the GCC region and the identification of the explanatory factors of efficiency. The first stage involved elaborating a non-parametric frontier using the DEA method for the assessment of the various components of productive efficiency. The second stage involved explaining the differences in performance.
Table 2. Benchmark Performance Measures of Islamic Banks vis-Г -vis Conventional Banks
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According to the information given on the table 2 Average of Commercial Banks with similar asset size in the countries where Islamic Banks are present. Commercial banks are selected in a way they are similar to Islamic Banks in size, measured in total assets. All commercial banks are selected the third quartile by size in each country in 2001. The value of each ratio represents the average in the period 1994-2001. [8]
Figure 1. Share of Islamic Banks in Total Banking System in Selected Countries, 2006 (Percent)
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Because the number of banks alone does not give a full picture of how important Islamic banks are, we compare the number of Islamic banks with the total number of banks across countries (Figure 1). Even in countries with only a few Islamic institutions, such as Brunei, Islamic banks have a strong presence. What we see is that in the Gulf region in general and in some African countries with sizeable Muslim population, the number of Islamic banks is relatively large. In other regions, the share of Islamic banks is in the single digits, indicating less importance. [8]
Deposit accounts
All the Islamic banks have three kinds of deposit accounts: current, savings and investment.
Current accounts. Current or demand deposit accounts are virtually the same as in all conventional banks. Deposit is guaranteed.
Savings accounts. Savings deposit accounts operate in diff...
