Yes, you definitely can. Easiest solution is to ask them, but you could also do observational studies if you had the funds.
Here's one example where we asked: http://www.gallup.com/poll/106249/wives-still-laundry-men-ya...
Yes, you definitely can. Easiest solution is to ask them, but you could also do observational studies if you had the funds.
Here's one example where we asked: http://www.gallup.com/poll/106249/wives-still-laundry-men-ya...