ADVERTISING WEEK, an annual stretch of industry meetings that began on September 26th in New York, is usually defined by schmoozing and self-congratulation. This year’s event has been marred by suspicion. In the week leading up to it, Dentsu Aegis, a big agency, admitted overbilling by its digital-ad division in Japan; and Facebook, a tech giant, said it had inflated the average time people spent watching video ads.

Such revelations have reinforced existing concerns among advertisers that they are having the wool pulled over their eyes when it comes to online advertisements. At an Advertising Week panel on “trust” on September 28th, Bob Liodice, the chief executive of the Association of National Advertisers (ANA), spoke of broad doubts among his members.

Read the full Economist article here.