Publisher's acknowledgements -- About the author -- Know who you're targeting -- Introduction -- The psychology of decision-making -- Who are you targeting? -- Cultural quirks -- Individual differences -- Communicate persuasively -- Basic principles -- Optimising your website -- Selecting the...

We analyze a large-scale randomized field experiment in which a search engine varied the prominence of search ads for 3.3 million US users: one group of users saw the status quo, while the other saw a lower level of advertising (with prominence of search ads decreased). Revealed preference data...