1 the views expressed in this working paper are those of author s and do not necessarily represent iea or policy papers describe research progress by published to elicit comments further debate impact convergence gas electricity industries trends implications kyung hwan toh org abstract studies between all over world study particularly concentrated on m&a activities as one major impacts that lend itself a numerical objective analysis following introduction sector reform number cross sectoral sectors rose substantially second half nineties most happened north america about 80 followed oecd europe pacific region largest share were cases where companies bought into since 1997 mega mergers have emerged which