I hope that you will forgive a little piece of self-promotion but Sophia Moestrup and I have just had published an edited volume. It is called Semi-presidentialism in Central and Eastern Europe. It is published by Manchester University Press at a cost of £60.00. Details are available here.

The chapter list is:

1. 1.Semi-presidentialism: a common regime type, but one that should be avoided? - Robert Elgie and Sophia Moestrup
   2. Belarus: a case of unsuccessful semi-presidentialism (1994-1996) - Andrei Arkadyev
   3. Semi-presidentialism in Bulgaria: the cyclical rise of informal powers and individual political ambitions in a ‘dual executive’ - Svetlozar A. Andreev
   4. Semi-presidentialism in Croatia - Mirjana Kasapović
   5. Semi-presidentialism in Lithuania: origins, development and challenges - Algis Krupavičius
   6. Semi-presidentialism in the Republic of Macedonia (former Yugoslavian Republic of Macedonia) - François Frison-Roche
   7. The impact of party fragmentation on Moldovan semi-presidentialism - Steven D. Roper
   8. Semi-presidentialism and democratisation in Poland - Iain McMenamin
   9. Romania: political irresponsibility without constitutional safeguards - Tom Gallagher and Viorel Andrievici
   10. Russia: the benefits and perils of presidential leadership - Petra Schleiter and Edward Morgan-Jones
   11. Slovakia’s presidency: consolidating democracy by curbing ambiguous powers - Darina Malová and Marek Rybář
   12. Slovenia: weak formal position, strong informal influence? - Alenka Krašovec and Damjan Lajh
   13. Ukraine: presidential power, veto strategies and democratisation - Sarah Birch
   14. The impact of semi-presidentialism on the performance of democracy in Central and Eastern Europe - Robert Elgie and Sophia Moestrup
   

There are lots of good things in the book, obviously, but you might be interested to know that all the contributors have calculated a presidential power score for their country on the basis of the Shugart and Carey framework in their Presidents and Assemblies book.