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economy of various countries and some of them have been approved that they have direct effect on GDP or NI, knowing these effective factors can help the governors to select appropriate course of action to increase the growth of their economy. But some of these factors effect are not approved yet completely because of their ambiguity in their effect on different economies and also the volatility of the elements of these factors. one of the most challenging factors that its effect on economy growth has been challenging is energy consumption. After industrial revolution energy has become a crucial element of growth of industries in several countries and so on the price and amount of usage of this element has caused important effects on economic situation of nations.

During recent decades so many researchers and institutes has investigated the effect of energy consumption on GDP growth of various countries using variety of methods ,and some of the like Kraft and Kraft (1978) which investigated the relationship of economic growth and energy consumption of USA using Granger causality during 1947–1974 came to this conclusion that a unidirectional causality runs from economic growth to energy consumption, thus suggesting that an energy conservation policy is feasible. after Kraft and Kraft (1978) so many researchers did the same research using different methods in so many developed and developing countries and they came into a variety of conclusions due to difference in scope of study, their data period and model specifications applied. Here as we are going to focus on some of ASEAN countries we review the researches that have been done for these developing countries and the methods that they have used in their researches.

Yu and Choi (1985) investigated the causality of GDP and energy consumption for five countries which were Korea, Philippines, USA, UK and Poland for period of 1954 to 1976 which is 22 data points. they used Standard granger test and the results were: for Korea there is unidirectional causality from GDP to energy consumption but in Philippines the unidirectional causality is vice versa, the direction is from energy consumption to GDP. For UK, USA and Poland they found no causality between two variables.

Hwang and Gum (1992) researched the causality of GDP and energy consumption for Taiwan. the method that they used was standard granger test and their data stream was from 1955 to 1992.the result they reached into was bidirectional causality between GDP and energy consumption. Also Cheng and Lai (1997) investigated this causality for Taiwan but using Hsiao's Granger causality test for the same period but they concluded that there is a unidirectional causality from GDP to Energy consumption and following these researches Yang (2000) did the same research using Hsiao's Granger causality test for the period of 1954-1997 and he reached the same result as Hwang and Gum (1992) reached. his research confirmed bidirectional causality between GDP and energy consumption.

In continue of the studies that have been done to investigate the relationship of the above mentioned variables Masih and Masih (1996) focused on these two variables for another set of countries in Asia, the countries that was their scope of study were Malaysia, Singapore, Philippines, Indonesia, India and Pakistan. Their research data stream was from 1955 to 1990 and they used error correction model. They concl