Majority of Agencies Plan to Retain or Increase Staff A fourth quarter survey of advertising agencies found that agency confidence was on the rise heading into 2017, in line with the reversal of expectations surrounding a Trump presidency. The survey was conducted by STRATA, a Comcast company and leader in media buying and selling, processing over $50 billion in advertising dollars annually. The survey found not one agency planned to cut staff, which is in line with WPP (WPP.L) CEO Martin Sorrell’s recent statement that the short- to medium-term outlook for the US economy is better than people may have…