Ei1	is Medicaid expenditures in State i at MFS levels.
Ei2	is Medicaid expenditures in State i at actual 1990 Medicaid fee levels.
p̃i	is the percent change in the Medicaid fee index in State i associated with increasing fees to MFS levels.
q̃i	is the percent change in services per enrollee in State i, q̃i = p̃ iε.
ε	is the elasticity of services per enrollee with respect to the Medicaid fee index.