In response to my previous post, Nik asked what I thought about the wisdom of giving up tenure in order to be more mobile at midcareer, or, in her words, "moving backwards to move ahead." I responded in the comments, but since this is something I've rarely seen discussed (and since I know only a handful of people who have done it), I thought it might be worth a post in its own right.
Unlike some of Nik's mentors, I don't think it's crazy to consider giving up tenure for the right job, but whether it's worth it depends on a lot of factors, some of which can't be assessed when you're just scanning the job ads. For me, giving up tenure would only be worth it for a markedly better job--whether that meant prestige, pay, or a significant improvement in my domestic/geographic circumstances. Even then, the exact terms of the offer would be crucial.
I actually did apply to three assistant-level jobs after getting tenure: one a modest step up in prestige, the others basically lateral moves; all in the same geographic region as my spouse. I was privately doubtful whether any could make me an offer I'd accept, but since there's no sense worrying about offers you haven't received, I threw out some applications (saying, in the first paragraph of my job letter, "although I received tenure in 2012, for the opportunity to join such a talented faculty I'd be happy to negotiate an appropriate tenure schedule"). Two gave me MLA interviews.
Once you get to the interview stage, it's worth starting to think about your non-negotiables. Some departments can hire you with tenure, even if the job wasn't listed that way, and if you get a fly-back you can sound out the situation then (but don't try it at the convention interview). Many departments, though, can't--I mean, legally, CANNOT.
If you get an offer that doesn't come with tenure, here are the factors I'd weigh in making a decision:
1. Do you have to give up rank as well as tenure? This matters. First off, if you get hired as an associate, nothing looks funny on your C.V.--but more importantly, getting hired as an associate is a sign that the institution regards you as already qualified for that rank.
2. What's the tenure timeline? Some departments can't hire you with tenure but will put you up for tenure immediately upon arrival. Again, this is a declaration that the department has already approved you for tenure (sometimes literally--one friend was told that the department's vote to hire constituted its approval of his tenure case).
3. Can you go up for tenure more than once? Often a faculty member has to go up within a certain number of years, but can do so earlier. If you go up immediately and something weird happens at the college or university level, do you get a do-over?
4. How close are you to meeting the tenure standard? Whether your title is assistant or associate, if you've already met the tenure standard, you're in good shape (at least if research is a primary criterion; teaching and service may be more of an unknown quantity).
5. Will you have the resources to meet the tenure standard? If your prospective employer expects much more for tenure than you've already produced, you want to make sure you'll have enough time and support (research funds, course releases) to get it done.
6. How will giving up tenure affect your progress toward full? If you're several years past tenure, it's worth knowing if any of what you've already produced will count toward full, or if everything before you get tenure at the new department essentially disappears and you have to start from scratch.
7. Everything else: salary, location, reputation, the "feel" of the place. All the stuff you normally consider will obviously be relevant in deciding if giving up tenure is worth it on the terms you're offered.
Readers: what considerations am I forgetting? And what have you seen with those who gave up tenure in order to move--smooth sailing? cautionary tales?
Inquiring minds want to know.