Hitwise.com
Hitwise compared the total visits to NYTimes.com for a 12 day period before the launch of the pay wall to the 12 days following the launch. For most days, there was a decrease in the overall visits between 5% and 15%. "The one exception was Saturday, April 9th, 2011 where there was a 7% increase, likely due to visitors seeking news around the potential government shutdown and ongoing budget discussions," writes Heather Dougherty.