Categorize the following statements based on new institutionalism approaches:

I. Democracies with proportional representation electoral systems have a greater number of parties than majoritarian systems.

II. State corporate governance regulations are shaped by prevailing economic ideas like neoliberalism.

III. Legal protections for marginalized groups develop due to advocacy by social movements over time.

IV. Clientelist political machines persist in some democracies due to cultural norms valuing personal loyalty.