Sometimes it seems like two different things get discussed when this topic comes up. On the one hand, we might have shortages of people with very specific skill

Sometimes it seems like two different things get discussed when this topic comes up. On the one hand, we might have shortages of people with very specific skills in certain industries (maybe Fortran / mainframe programmers are hard to find, for example.) On the other hand, the BLS data, various studies, and other sources like CEPR agree with him in the more general case: http://www.cepr.net/blogs/cepr-blog/is-there-a-shortage-of-workers-in-stem-fields http://www.cepr.net/blogs/cepr-blog/is-there-a-shortage-of-w... http://www.latimes.com/business/hiltzik/la-fi-hiltzik-20150802-column.html#page=1 http://www.latimes.com/business/hiltzik/la-fi-hiltzik-201508...