Key points are not available for this paper at this time.
Part I. Presidential and Parliamentary Democracy: 1. Basic choices in democratic regime types 2. What is presidentialism? Criticisms and responses 3. The constitutional origin and survival of assembly and executive 4. Legislative powers of presidents: veto and decree Part II. Electoral Dynamics of Presidential Democracy: 5. Electoral dynamics: efficiency and inefficiency 6. Electoral rules and the party system 7. Electoral cycles and the party system Part III. Institutiona: Engineering: 8. Semi-presidentialism: the third alternative 9. Electoral cycles in semi-presidential regimes 10. Divided polities and collegial presidencies 11. Conclusions Appendices.
Shugart et al. (Thu,) studied this question.