“…Summing up, the most relevant works, such as Kieschnick et al (2002), Brown and Cavazos (2005), Kasuga and Shishikura (2006), and Wilbur (2008), found that audience, advertising time, and demographic characteristics were influential factors explaining advertising price. Some works also considered the degree of competition between private and public channels, and the results suggest some beneficial effect from public intervention.…”