Functional measure for quantum gravity

We derive the functional measure for quantum gravity by reducing to independent degrees of freedom in the light-cone gauge. We use the recently developed functional techniques devised to handle field theories with second-class constraints in order to analyze quantum gravity quantized along null planes, where it has been shown that all eight dependent components of the metric may be explicitly functionally eliminated, leaving only two unconstrained variables. Using our result, we confirm the result of Fradkin and Vilkovisky for the functional measure for quantum gravity, though we disagree with several other authors who have different measures.