A Freakonomics podcast interviewed Prof. Melissa Kearney. Her thesis was that better jobs would result in more marriages in the USA. As an economist this was important to her because kids with married parents do better than other kids.
My 86 year old mother was sent a package from the USA to Israel in the beginning of May through the EMS speedy delivery option. Every week we put in the tracking code on the Israeli post office website and every week it said - no such package.