Cost-of-service

Why will cost-of-service studies continue to prove useful in a competitive market?

Cost is one of more than a dozen factors to consider in setting prices, whether in a regulated environment or a competitive regime. However, the relative significance of these factors will change under competition, when understanding the true cost of an individual service will actually become more important than under regulation.

Up until now, cost-of-service ratemaking has provided relatively stable rates, while enabling utilities to attract enormous amounts of capital. Of late, however, regulators appear to be heeding the argument that changing markets warrant a second look.

Our 13th annual electric rate-case survey covers electric rate orders issued between

April 1, 1994, and March 31, 1995.

The survey tabulates rates of return on common equity (ROE) approved by state public utility commissions (PUCs) in major electric rate orders, but also includes some cases in which rate of return was not directly at issue, or where a rate adjustment resulted from a settlement agreement.

In his recent article, "Cost-of-Service Studies: Do They Really Tell Us Who's Subsidizing Who?" (Nov. 15, 1994), Mark Quinlan proposes an alternative cost-of-service methodology. He claims that under current cost-allocation methods (and given adequate capacity to meet demand) a rate class with increasing sales subsidizes a rate class with decreasing sales.