Here are two equivalent expressions:
1. “have a tight control over the economic assets of the country,
2. “exercise a tight control over the economic assets of the country,
Here are two sentences which give "living with" a different meaning:
1. He is blind in one eye and he lives with it. Here "lives with it" = "accepts it" = "puts up with it" = "tolerates it"
2. He is living with the fact that his wife spends too much money. "is living with" = "accepts" = "puts up with"= "tolerates"