Feared as a radical move, the nationalization was in effect a renegotiation of terms with foreign energy companies that have stayed in Bolivia, attracted by the country’s bountiful natural gas reserves. Revenue from oil and natural gas climbed to 13.3 percent of gross domestic product in 2006 from 5 percent in 2004, according to the Center for Economic and Policy Research in Washington.

Feared as a radical move, the nationalization was in effect a renegotiation of terms with foreign energy companies that have stayed in Bolivia, attracted by the country’s bountiful natural gas reserves. Revenue from oil and natural gas climbed to 13.3 percent of gross domestic product in 2006 from 5 percent in 2004, according to the Center for Economic and Policy Research in Washington.