While this score was a useful starting point, the measure used in this study better incorporates the county specific dynamics that drive whether or not the TELs in Colorado have a binding effect. To achieve this, one can abstract away from the policies themselves and evaluate only their impact on fiscal variables. In particular, the measure was constructed based comparing the property tax base to the limit imposed by the conjunction of the SLPTR and TABOR when both apply to a given county-year. If only one or the other applies (due to De-Brucing) in a given county-year, then the limit is just that imposed by the relevant policy. The reason for the composite measure is that only one of the two policies is binding at any given time. To get a sense for how this occurs, the figure below plots the limits of both TABOR and SLPTR over time for Adams County.