; and (XXI) incorporate advances in the science of policy evaluation, such as the use of— (aa) randomized control trials; (bb) other experimental and quasi-experimental approaches; and (cc) large data sets and machine learning techniques; and (ii) procedures and standards for third-party verification of reported electricity savings or natural gas savings. (2) National Academy of Sciences study Not later than 180 days after the date of enactment of this section, the Secretary shall offer to enter into an agreement with the National Academy of Sciences, under which the Academy shall— (A) evaluate existing state-of-the-art methods for evaluating energy efficiency policies and measures; (B) identify approaches in program evaluation literature that may be brought into the energy efficiency domain, including— (i) randomized control trials and other experimental or quasi-experimental approaches; (ii) control of confounding factors; (iii) longitudinal studies; (iv) assessments by neutral arbiters; and (v) disclosure of data for replication; and (C) not later than 18 months after the date of enactment of this section, publish a report that includes— (i) a description of the evaluation under subparagraph (A); (ii) a description of the approaches identified under subparagraph (B); and (iii) recommendations for advancing and adopting rigorous state-of-the-art methods for evaluating energy efficiency policies and measures. (3) Energy efficiency program evaluation database (A) In general The Secretary shall establish and maintain a searchable public database, accessible on the website of the Department of Energy, that contains a list of randomized control trials and other experimental or quasi-experimental evaluations of energy efficiency programs. (B) Requirements Each trial or evaluation on the list described in subparagraph (A) shall include, at a minimum— (i) the State in which the trial or evaluation was conducted; (ii) the type of trial or evaluation conducted; (iii) the type of program evaluated