I mean, for economists, I'm an economist myself, so for economists, also

people... emphasize the fact that the economic structure changes across countries, the returns to different fields may be different.

So, for instance, think about Nordic countries.

You have lots of wage income compression because it's a very progressive tax system.

So, you know, if you do engineering, you know, maybe how much more money you will make is the difference is not so large.

So in this context of wage compression, maybe it's less attractive to the certain countries choices that are far away from your preference.

So these are the kind of the three explanations in the literature.

Talk a little bit more about how These kind of shocks psychologically affect children and what sociologists usually have noticed when these disruptions happen.