You’d think today’s modern woman would be happier than ever.

We’ve got it all — the right to work, the right to not work, the right to sleep with David Letterman — but, surprisingly, a comprehensive new study is pointing to one very disturbing trend.

Compared to 35 years ago, today’s modern woman is, in fact, more miserable than ever.

What’s even more troubling? According to this new meta-analysis of major data sets available on well-being research, men by contrast are actually growing more content than ever.

“We basically noticed something that hadn’t been noticed before, which is that women are becoming less happy relative to men, both in the US and in Europe,” says Justin Wolfers, who recently published these findings with his romantic and research partner, Betsey Stevenson (how’s that for a “second shift”?). “This study has very big implications for happiness researchers.”