There is a major lack of transparency in the guidance and restrictions communicated to associates, and a scarcity of systematic monitoring of affiliate habits, which will increase the danger of opportunism or misconduct. “The rank in search-engine promoting has no affect on the click path. Merchants should goal for lower rankings to lower their costs per click, keeping in mind the danger of weakening the results of search-engine promoting. “Many research have examined the affect of 1 channel on one other, but there is no consensus in regards to the influence of search-engine advertising on other channels,” the authors note.