The economics behind this is fascinating. In the last few months, there has been a host of NICU nursing vacancies posted in Las Vegas. I imagine one Las Vegas hospital poaches NICU nurses from another hospital, then that hospital has NICU vacancies and there is cycle of poaching introduced.
There is a strong connection between Las Vegas and Utah, so Utah NICU nurses might be tempted by the higher paying jobs in Las Vegas and then Utah hospitals have vacancies.
I imagine the whole topic would provide an interesting research opportunity for nursing PhD students.