Editing Cost-effectiveness analysis (section)

===In energy efficiency investments===
CEA has been applied to [[efficient energy use|energy efficiency]] investments in buildings to calculate the value of energy saved in $/kWh. The energy in such a calculation is virtual in the sense that it was never consumed but rather saved due to some energy efficiency investment being made. Such savings are sometimes called ''[[negawatt]]s''. The benefit of the CEA approach in energy systems is that it avoids the need to guess future energy prices for the purposes of the calculation, thus removing the major source of uncertainty in the appraisal of energy efficiency investments.<ref>{{Cite journal |doi = 10.1016/S2212-5671(15)00195-1|title = Economic Appraisal of Energy Efficiency in Buildings Using Cost-effectiveness Assessment|journal = Procedia Economics and Finance|volume = 21|pages = 422–430|year = 2015|last1 = Tuominen|first1 = Pekka|last2 = Reda|first2 = Francesco|last3 = Dawoud|first3 = Waled|last4 = Elboshy|first4 = Bahaa|last5 = Elshafei|first5 = Ghada|last6 = Negm|first6 = Abdelazim|doi-access = free}}</ref>