“…As shown in Figure 1, the prices of ETMs are highly volatile. Since the mid-70s the energy economic literature has devoted renewed attention to the impact of oil shocks on energy-dependent economies (Bastianin et al, 2017;Hamilton, 2009;Kilian, 2008Kilian, , 2009Peersman and Van Robays, 2012) as well as on oil-rich economies (Ahmadi and Manera, 2021;Berument et al, 2010;Esfahani et al, 2014). The methodologies and results of that literature contain important insights for the affordability of ETMs.…”