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Posts Tagged ‘Evidence’

None of those things are observable

An interesting article, The STEM Crisis Is a Myth by Robert N. Charette.

For years I have been hearing about the STEM shortage but every time I look at the employment and salary numbers, all I see is the market functioning normally. People with STEM degrees and functioning in a STEM capacity in a STEM field are always in demand and their average compensation, as the article points out, has been fairly steady.

Granted, there are emergent fields, unique circumstances, and pressing needs that will suddenly create a temporary demand for those with a very particular STEM skill set, but the market functions, more people move in or specialize in the hot area and pretty soon things are back to normal.  Also granted that the best people in any one of the STEM fields can command very high premiums over the novice.  You might not like having to pay $150,000 for an experienced ERP implementation manager and you might wish that they were cheaper but that does not necessarily mean that there is a shortage of experienced ERP implementation managers.

I think this is once again an issue arising from particular advocates wanting to use the coercive force of government to achieve individual objectives.  Engineers too expensive, issue more green cards.  Increased supply will reduce the cost.

Given all of the above, it is difficult to make a case that there has been, is, or will soon be a STEM labor shortage. “If there was really a STEM labor market crisis, you’d be seeing very different behaviors from companies,” notes Ron Hira, an associate professor of public policy at the Rochester Institute of Technology, in New York state. “You wouldn’t see companies cutting their retirement contributions, or hiring new workers and giving them worse benefits packages. Instead you would see signing bonuses, you’d see wage increases. You would see these companies really training their incumbent workers.”

“None of those things are observable,” Hira says. “In fact, they’re operating in the opposite way.”

Read the whole thing.

Fairy tales masquerading as evidence

Science bible stories, take 27 by Mark Liberman is a useful discussion (including in the comments) about the tendency of media to take up a topical research paper without regard to the methodological robustness of the study or whether the results are meaningfully true.

As I observed a few years ago, “scientific studies”  have taken over the place that bible stories used to occupy. It’s only fundamentalists like me who worry about whether they’re true. For most people, it’s enough that they can be interpreted to be morally instructive.

[snip]

I’d add a third important factor: by and large, the “wise men” (and now the “wise women”) don’t really care about whether the empirical and theoretical foundations of their opinions are sound . They care about readers, ratings, and reputation — and in some cases about political outcomes or cultural values —  with truth relevant only insofar as it affects those goals.

I think Liberman is correct.  People rarely consider what evidence they need in order to make an argument, instead they go after information that is convenient to get.  At the same time, the market structure for ideas and information is such that there are incentives to produce affirming information to a range of prejudices, regardless of the truth of the matter.  Elsewhere I refer to this as cognitive pollution as it constitutes dirt in the system that tends to occlude rather than clarify.

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