; (II) expansion or such innovation program or service to another site; and (III) implementation of a multi-site evaluation of such innovation program or service. (D) Level of evidence standards The levels of evidence described in this subparagraph are the following: (i) Low level of evidence An innovation program or service is supported by a low level of evidence if such program or service has demonstrated, through a reasonable hypothesis and credible research findings (such as a correlational study with statistical controls for selection bias), descriptive research (such as a case study), or evidence review and needs assessment, the— (I) ability to achieve positive effects on earnings and employment outcomes for jobseekers (including individuals with barriers to employment) and earnings for employers; or (II) potential to achieve such effect on such outcomes. (ii) Moderate level of evidence An innovation program or service is supported by a moderate level of evidence if such program or service has demonstrated the ability to achieve sizable, but not yet conclusive, positive effects on earnings and employment outcomes for jobseekers (including individuals with barriers to employment) and earnings for employers, through— (I) a well-designed and well-implemented experimental study of such program or service, such as a randomized controlled trial