Google Data Collection is a new study by Professor Douglas C. Schmidt from Vanderbilt University dated 15th August 2018.
Professor Schmidt's conclusion is as follows:
Google counts a large percentage of the world's population as its direct customers, with multiple products leading their markets globally and many surpassing 1 billion monthly active users. These products are able to collect user data through a variety of techniques that may not be easily graspable by a general user. A major part of Google's data collection occurs while a user is not directly engaged with any of its products. The magnitude of such collection is significant, especially on Android mobile devices. And while such information is typically collected without identifying a unique user, Google distinctively possesses the ability to utilize data collected from other sources to de-anonymize such a collection.
Download rhe full report here [link]