Abstract
My work aims to introduce a new indicator to explain jointly Brain Drain, Brain Return and Brain Gain (LISE). The Goal of my model is to introduce a new indicator to compare levels of individual well-being, levels that influence highskilled migration's flows. I have adapted my simple indicator, to firms migration's flows (LSV). My indicator (LSV) measures levels of attractiveness related to each area of interest and it were perfectly comparable in case of very different regions even if these areas exhibit political or geographical or environmental or social or legal or other kinds of strong differences. I 'm able to reach a Nash's equilibrium instead a Pareto's optimal equilibrium which is impossibile to achieve with an empirical based model. So dominat strategies are fixed by the presence of outsiders countries that have the necessity to implement their attractivity to take their gain. So best performers countries must only make lesser damage to themselves.