We thank the anonymous reviewers for constructive comments that lead to improvements in this paper. This research was supported by the National Science Foundation under Grant AGS-1112200.
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Using, for example, CPC15 and offsetting it to the midpoint of the window is an unsatisfactory solution, because fictitious data must be generated to extend removal of the nonstationary climate-mean signal to the beginning and end of the record.
The second author has participated as an expert witness in eight natural gas rate-setting cases before state public service or utility commissions.