This built on the success of Public - Private Partnerships ( PPPs ) in developed countries since the model again became popular in the 1980s .
Public - Private Partnerships in transition economies have become increasingly popular since 1990 .
This built on the success of Public - Private Partnerships ( Public - Private Partnerships ) in developed countries since the model again became popular in the 1980s .
Public - Private Partnerships in transition economies have become increasingly popular since 1990 .