Knowledge Center Time-Varying Rates By David Littell On February 28, 2017 David Littell delivered a presentation on time-varying rates for the Maryland Public Service Commission’s PC-44 work group on rate design. Featured News and Events Newsletter February 16, 2023 睿博能源智库·博议,2023年2月/RAP China Quarterly Review, February 2023 Newsletter August 29, 2022 The RAPPORT, U.S. Edition, August 2022 Newsletter July 29, 2022 The RAPPORT, Europe edition, July 2022