We don’t know if the users whose data was collected were asked for permission.
research
iPhone Study Shows a Link Between iPhone Usage and Wealth
A paper from the National Bureau of Economic Research suggests that owning an iPhone is a sign of wealth. The iPhone study was done by economists Marianne Bertrand and Emir Kamenica.
Apple Shares AI Research, Listener Comments - TMO Daily Observations 2016-12-09
Apple is changing course and letting its engineers publish their research into artificial intelligence. John Martellaro and Bryan Chaffin join Jeff Gamet to share their thoughts on why Apple would do that, plus they respond to a listener comment questioning why Jeff is critical of HomeKit.