Using results from the Afrobarometer surveys, Michael Bratton has written an article in a recent issue of Journal of Democracy (you must have access to JoD articles to read this) on the relationship between formal and informal institutions and democracy in a sample of African countries.
This is a blurb from the article about Afrobarometer: “[Bratton] is also founder and director of the Afrobarometer, a collaborative international survey-research project that measures public opinion regarding democracy, markets, and civil society in eighteen African countries.”