And there may be another explanation: pressure from parents to get a good return on the family's investment.

VOA: special.2009.03.12

Netflix members do not have to go to the video store to get movies or to return them.

VOA: special.2009.09.25

"Every one of them is going to encourage them, 'Go, go,get an education, get a job.'" Then when they have their university degree, he says there is no reason to return.

VOA: special.2011.07.01

"I started thinking about where else can I get some kind of reasonable rate of return where return can actually be defined more fully than just how much money did I make."

VOA: special.2011.01.14

Travelers waiting around here are missing out on income because they cannot return to work, like this French physical therapist hoping to get back to Paris.

VOA: standard.2010.04.19

On the Iran nuclear issue, Lavrov said while Moscow opposes harsh additional U.N.sanctions against Tehran, it does support,and is applying, "robust" political pressure to get Iran to return to negotiations with the major powers on its enrichment program.

VOA: standard.2009.05.07