The agreement, which goes into effect immediately and runs until 2015, includes the organisation of the World Economic Forum's regional events in the Middle East, Africa, East Asia and Latin America.
PublicisLive will also organise events such as the Annual Meeting of New Champions in Tianjin, China in September and the Global Agenda Summit in Dubai in November.
The agreement cements the existing relationship between the World Economic Forum and PublicisLive, which has produced Davos and other meetings for the forum since 1995.
John Rossant, executive chairman of PublicisLive, said: "It is a privilege to work alongside the forum to bring together global leaders in politics, business, science and other fields in unique and unforgettable idea exchanges.
"This award is a great recognition of the ability of PublicisLive teams in Geneva and around the world to deliver the world's most complex and compelling international events."
Andre Schneider, managing director and chief operating officer of the World Economic Forum, added: "I salute the exceptional and long-standing partnership existing between the World Economic Forum and PublicisLive -- a partnership which ensures the excellence and high-quality of our meetings in Davos and around the world."