Our very own Ed Kazarian writes in Inside Higher Ed here. (Congrats Ed!) He nicely summarizes our earlier discussion here at NewAPPS (here, here, here), and shows with patience how the NBER economists used very misleading rhetoric in their piece. Kazarian calls attention to why their bogus rhetoric (tenure vs non-tenure) matters. I quote his concluding remarks:
[T]here is nothing about teaching-intensive faculty that is incompatible with their being eligible for tenure — especially if one fully intends to build long-term relationships with them and keep them around.
Why, one is led to ask, can we not have "efficiency" and tenure? The answer, if there is one, must have to do with other ways in which non-tenured faculty differ from those with tenure. The authors mention academic freedom — an important consideration.
But they otherwise ignore the degree to which non-tenured faculty lack a secure position from which to question, criticize, or oppose the actions of university administrators.
And here, indeed, is another sense of "efficiency" that administrators at many institutions might well wish to cultivate, allowing them to enjoy a pedagogically effective, but largely vulnerable, and therefore easily controlled faculty.