Noah Smith is supposed to be an economist. But judging by everything I've read by him, just like Stephen Moore, he is only a shill for corporate America.
This article What Tech-Worker Shortage? (at Bloomberg by Noah Smith -- November 26, 2014) makes a futile attempt to debunk this article The Tech Worker Shortage Doesn't Really Exist (at BusinessWeek by Josh Eidelson -- November 24, 2014).
Noah Smith's first absurdity: "Low-skilled workers will benefit if we let in skilled immigrants. The skilled immigrants will shop at the grocery stores, take cab rides and get their lawns landscaped, thus putting money into the pockets of the low-skilled American workers."
My response: Low-skilled workers would benefit much more if we don't let in skilled immigrants (tech skilled workers on H-1B visas) and pay them less than domestic skilled workers because domestic skilled workers would be earning more than skilled immigrants and put much more money into the economy.
Noah Smith's second absurdity: "Meanwhile, some native-born tech workers will be put out of a job, but since the number of jobs in the world isn’t fixed, they will find new jobs at new companies -- possibly for a bit less money than they earned before, but they will be OK. And with the creation of those new companies, the economy will grow."
My response: Native-born tech workers have not been OK. A great many went from middle-class to poor just to make the CEOs of tech companies much richer than they already were — and then some renounced their U.S. citizenship and moved to a foreign country (such as Singapore) to avoid paying U.S. taxes.
Further reading: The STEM Crisis Is a Myth (at IEEE Spectrum by Robert N. Charette -- August 30, 2013) and H-1B Guest Worker Fraud and the "Lacking Skills" Scam (at Daily Kos by Bud Meyers -- April 1, 2013*)
* I posted this on April Fool's Day. No pun was intended.