“…In addition to the disaggregated indicators, there are a large number of energy security indices which are available in literature, such as diversity based index [40], Energy Security Index (ESI price and ESI volume ), IEA [41], 'willingness to pay function' for security of supply proposed by Bollen [42], OVI (Oil Vulnerability Index), Gupta [43], Vulnerability index, Gnansounou [44], Geopolitical energy security measure [45], Risky external supply index [27], Economic and Socio-political risk index under project REACCESS (Risk of Energy Availability: Common Corridors for Europe Supply Security) [46], Energy affinity index [47], Energy development index, IEA [48], Energy sustainability index, Doukas et al [49], AESPI (Aggregated Energy Security Performance Indicator) proposed by Martchamadol and Kumar [25], amongst many others.…”