I do not have any nonworking hours. There, I said it. There are just no hours in my day that are totally off-limits to working either for my day job or for the numerous other things I do. I’m not complaining. I love what I do. I’m just stating the obvious for a working mother of three. So yes, I’ve written e-mails at 3 a.m.

Knowing what I know about my work life, I was intrigued by a survey conducted by the Society for Human Resource Management, which found that 21 percent of organizations have a formal policy that limits employees’ use of wireless devices such as cellphones and tablets during nonworking hours for work purposes. Twenty-six percent have informal policies.