In fact, they used the word element to talk about anything that was basic. Ancient Greek philosophers, for example, thought that everything consisted of four elements: earth, fire, water, and air. Other philosophers thought there were only two elements: sulfur and mercury.
The Internet was expected to eliminate search costs (Pereira 2005). For example, electronic commerce was predicted to cause disintermediation as search costs become low enough for end-consumers to incur them directly instead of employing retailers to do this for them.
Listed below are the most expensive keyword categories in Google AdWords, and the average cost-per-click of each. Itâs worth noting that these are keyword categories, not actual keywords themselves â in some cases, the CPCs of keywords within each category may be higher than the averages stated: Insurance - $54.91; Loans - $44.28; Mortgage - $47.12