do tariffs protect american jobs and wages?
Since this is not my area of expertise, I searched Google under the key words "tariffs 'American wages'" to get these possible sources:
(Broken Link Removed)
http://www.time.com/time/magazine/article/0,9171,983654-3,00.html
http://books.google.com/books?id=t65idUrMYusC&pg=PA36&lpg=PA36&dq=tariffs+%22american+wages%22&source=web&ots=nPf5XcOJqt&sig=WJ999jYHE5XvtUUnekOwWUP893M#PPA36,M1
(See pages 36ff)
http://www.johndclare.net/America3.htm
http://rebirthofreason.com/Articles/Younkins/Trade_Barriers_Are_Immoral_and_Destructive_of_Economic_Well-Being.shtml
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. You can apply this to your other post.
I hope this helps. Thanks for asking.