petagny,
I was able to find an old reference. It is likely that the system will have changed somewhat since then (most countries' in the study have - as is the norm!), but it does give a reasonably useful outline of the context, benefits, limitations and pitfalls of that particular approach. It is: MA, Jun 1997. "Intergovernmental Fiscal Transfer: A Comparison of Nine Countries (Cases of the United States, Canada, the United Kingdom, Australia, Germany, Japan, Korea, India, and Indonesia)", prepared for the Economic Development Institute, World Bank. Keep us up-to-date with your progress as the subject is inherently interesting and timely.
Fitz.