“…In addition, his findings indicate that oligopolistic coordination is a more appropriate explanation of the observed asymmetry than theories related to the cost of search to consumers. In addition, studies of asymmetry in the gasoline market have been conducted in Italy [12], Greece [13], China [14], United States [15], Brazil [16], Russia [17], Australia [18], South Korea [19][20][21], Europe [22], and many countries [23]. The asymmetry study was applied not only to the gasoline market, but also to the electricity market [24] and the aviation market [25].…”