Spending on global paid search advertising saw a 7 percent year-over-year (YoY) growth, according to Covario. On a global platform basis, cost-per-clicks (CPCs) increased an average of 10 percent YoY. Click-through rates (CTRs) performed 28 percent better than in the same period in 2012. Covario predicts that paid search investments will increase 15 percent in the U.S. and Canada this year. Globally, Google represented 84 percent of market share in spend, 88 percent in impressions, and 62 percent in clicks, according to Covario. Paid search advertising spend on Google was up 7 percent from 2012. In comparison, Yahoo Bing held 8 percent of global market share in spend and 6 percent in clicks. RKG found that Google's share of U.S. paid search spend and traffic in Q3 and Q4 2013 were 80.5 and 79.5 percent, respectively. Get the full story at ClickZ