Finance Minister Arun Jaitley on Tuesday said that the government's policy initiatives have initiated a set of chain reactions towards formalisation of the economy."Several policy initiatives of government have set up a chain reaction, which is visible in various ways," Jaitley said here at the official launch of Paytm Payments Bank."If you have a private company, a public sector bank taking initiative, then the practice of cash being predominant is being changed," he added.