The H1B study sounds suspicious and the defence of the H1B program weakened an otherwise strong article.
H1B abuses have been long documented so while there are legitimate benefits to it, they are outweighed by the problems.
H1B abuses have been long documented so while there are legitimate benefits to it, they are outweighed by the problems.
I see no need to present sources and results - I'm not claiming anything as fact, just stating opinion in a comment.