You may opt-out of many third-party ad networks. Google's use of the DoubleClick cookie enables it and its partners to serve ads to Empirical’s users based on their visits to Empirical’s sites and/or other sites on the Internet. Additionally, the website http://www.networkadvertising.org/optout_nonppii.asp provides information regarding this practice by Network Advertising Initiative (“NAI”) members, and your choices regarding having this information used by these companies, including how to “opt-out” of third-party ad networks operated by NAI members. You also may contact the Digital Advertising Alliance at http://www.aboutads.info/choices/for information about opting out of targeted advertising and your choices regarding having information used by About Ads member companies, including how to “opt-out” of third-party ad networks operated by About Ads members. Opting out of one or more NAI members or DAI members (many of which will be the same) only means that those members no longer will deliver targeted content or ads to you, but it does not mean you will no longer receive any targeted content or ads on our Site or other websites. You may continue to receive advertisements, for example, based on the particular website that you are viewing. Also, if your browsers are configured to reject cookies when you visit this opt-out page, or you subsequently erase your cookies, use a different computer or change web browsers, your NAI or DAI opt-out may no longer, be effective. Additional information is available on NAI’s and DAI’s websites accessible by the above links.