Over the past few decades, countries in the Association of Islamic Cooperation Organizations (OIC) have reached various levels of economic development. At present, increasing energy access is one of the goals to be achieved by ensuring affordable, reliable, sustainable and modern energy access. This study aims to measure the effectiveness of energy access based on the indicators of the seventh sustainable developmet goals (SDGs) in 50 countries that are members of the OIC during the period 2010-2017. Efficiency measurements are carried out using the Data Envelopment Analysis (DEA) method. The productivity measurement is done by using the Malmquist Productivity Index (MPI). The results showed that Yemen was the country that had the highest rate of increase with a TFP value of 1.194. While the State of Egypt was the country that experienced the largest decline with a TFP value of 0.821. On the other hand, there are differences in the level of efficiency regionally, where Muslim countries in the European continent are then followed by the countries of the West Asian region in the second position and the third position is the central African region which is superior to the region Other Africa.

The research was aimed to know the influence of population number, economic growth, and inflation to the Islamic bank growth in Indonesia. Data used in the research was panel data, which were the combination of time series data (sequence of time) and cross section data during ten years from 2009 until 2018. The method used in the research was panel data analysis with the approach of fixed effect model. The result of regression test showed that there was a positive influence among the population number, economic growth to the Islamic bank growth. Meanwhile, the inflation had a significantly negative influence to the Islamic banking growth in Indonesia.

Introduction to The Problem: Measurement of the level of efficiency of Islamic banks in Indonesia is widely carried out. But almost no one has done research with the DEA window analysis approach.Purpose/Objective Study: This paper aims to measure the efficiency of Islamic banks in IndonesiaDesign/Methodology/Approach: – Using Data Envelopment Analysis (DEA) method and window DEAFindings: This research shows that the efficiency of Islamic banks that included in observations from 2011-2016 fluctuated with a mean value of 63 percent. From the perspective of efficiency stability analysis through several summary statistics such as standard deviation (SD), Long Distance per Window (LDW), Long Distance per Period (LDP) and Long Distance per Year (LDY), the relatively stable Islamic bank efficiency value is Bank SyariahMandiri (BSM) and BCA Syariah.