Complex sentence: It has been used in peer-reviewed studies some of which have found a range of beneficial effects of more economic freedom, but countries with higher economic freedom suffered more in output growth during the late-2000s financial crisis.
Split into simpler sentences: It has been used in peer-reviewed studies some of which have found a range of beneficial effects of more economic freedom. Countries with higher economic freedom suffered more in output growth during the late-2000s financial crisis.