Before revision:  In particular, we have explored the evolution of the bipartite country-product World Trade Web  across the years 1995-2010, monitoring the behaviour of the system both before and after 2007.
After revision:  In particular, we have explored the evolution of the bipartite country-product World Trade Web (WTW) across the years 1995-2010, monitoring the behaviour of the system both before and after 2007.