Readers intent on enlightening me often send me books and essays written by them or, less often, others. Now and then one of these offerings grabs my attention before I hit “delete.” A recent example: ...

Perhaps the most important part of the survey process is the creation of questions that accurately measure the opinions, experiences and behaviors of the public. Accurate random sampling will be ...

Brett O'Donnell is a debate consultant who trains Republican candidates. He has worked with George W. Bush and John McCain, and for a short time earlier this year, he helped prep Mitt Romney.

If you search the Internet for the phrase 'collective behaviour', most of what pops up will be about group activities of humans, including riots, fashion and mass panic. But collective behaviour is ...