Disclaimer. Don't rely on these old notes in lieu of reading the literature, but they can jog your memory. As a grad student long ago, my peers and I collaborated to write and exchange summaries of political science research. I posted them to a wiki-style website. "Wikisum" is now dead but archived here. I cannot vouch for these notes' accuracy, nor can I say who wrote them.
Posada-Carba. 2001. Democracy, parties, and political finance in Latin America. Paper presented at the conference on Political Finance and Demcoracy in East Asia, Seoul, South Korea, June 28-30.
The author studies how state financing of political parties affects party systems.
Lots of potential here for further research.
Research on similar subjects