the calculation heightens the sensitivity with which share of incremental browser usage reacts to contemporaneous forces. Microsoft was thus particularly interested in share of incremental browser usage, not only as an indication of Navigator's and Internet Explorer's relative attractiveness as platforms, but also as a sensitive reading of the impact that its actions were having. 362.  According to data on which Microsoft relied in the course of its business, Internet Explorer was, by late 1997, capturing a larger share of incremental browser usage than Navigator. Specifically, data that the company then deemed reliable showed that fifty-seven percent of the new users of browsing software in the last six months of 1997 used Internet Explorer, while only thirty-nine percent used Navigator. By February 1998, Microsoft's data showed that sixty-two percent of the new Internet connections over the previous six months were using Internet Explorer, versus thirty-eight percent for Navigator. Since there is no indication that Navigator users as a group employ their browsers more than Internet Explorer users, these data indicate that Internet Explorer's share of incremental usage had exceeded Navigator's by late 1997. This meant that Internet Explorer's share of all browser usage was moving to surpass Navigator's. To Microsoft, these numbers not only marked a significant decline in Navigator's attractiveness as a platform, they also reflected the substantial impact of Microsoft's actions. 363.  The "hit" data collected by AdKnowledge comport with the share estimates on which Microsoft and AOL relied internally. AdKnowledge is a company that markets Web advertising