Jac Depczyk : images

jacdepczyk.com
Deep Trawling
about economics and techniques of Internet advertising.
John Wanamaker, the 19th-century founding father of marketing, reportedly declared: “Half the money I spend on advertising is wasted; the trouble is I don’t know which half.”
Link: www.economist.com/news/finance-and-economics/21581715-simple-tests-can-overstate-impact-search-engine-advertising-ad-scientists