Environmental economist Matthew Kahn estimates that a $15 per ton carbon tax would cause a 2.9% decline in New Hampshire manufacturing, or 1400 jobs.

The RGGI price is $1.89, suggesting a current, real-life decrease of approximately .4%, or 177 jobs.

Kahn adds:
Before opponents of cap and trade start to cite these numbers, it is important that clear headed folks keep in mind that this legislation will also stimulate the vaunted "green jobs" for the State. ...

The key point that nerds need to study is that such legislation simultaneously "destroys jobs" and "creates jobs". Here is another NBER study.