We can firstly use the experience gained with ESPON 2006 program. In particular the world database elaborated by project Europe in the World (ESPON ) could be updated and eventually improved (modification of the WUTS Sytem ?). But we suggest to introduce a more general connexion with UN statistical system through an expert team specialized in the integration of world databases. The most difficult question will be the connection between the WUTS system and the NUTS system through the level of states. Indeed, a figure like the population of Germany in 2000 is not necessary the same according to a.
