Has there been any studies of pathological "nomad-ness"? I've spent some time trying to search for this but my lack of knowledge limits my ability to find any information about this subject. 

I know someone who constantly sees another city as a "Grass is Greener" and will pack up and move about every eight months. This behavior of "loose-footing" that I'm trying to describe meets the 4 D's of Psychopathology: 


Deviance: Moving to another town for an unacceptably bad reason that someone of their intelligence wouldn't accept if they heard it from someone else.
Distress: Forgoing valuable social and capital assets that causes hardship after the move. Feelings of loneliness after losing touch of newly created friendships before the move. Constant anxiety of not moving to a new city when they think they find a better one.
Dysfunctional: The person is in complete denial of the behavior trend and after moving to a new city will spend resources in material or non material assets that reflect an intention to not move again. Like signing a two-year lease or selling or buying a car or a city parking space. Or quitting a Top-100 University after two years and a 4.0GPA in engineering that gave them a full-ride, because of a unacceptably poor reason.
Danger: These self-imposed hardships give the person chronic depression and a danger to harm themselves.


I'm only talking about this when it is pathological. I am assuming this is common, but I'm unsure of how common it is as I can't find any info about it. Hence the motivation for the  question.  I'm not referring to a cultural group or a nomad as being pathological.

One could say that this is just depression and/or anxiety and while that is true. I would imagine that this behavior is unique or common enough to deserve its own study of this trend, its origins or treatment strategies. For example growing up with derelict parents or maybe moving too often during childhood.
Although not a clinical diagnosis for mental disorder, the term Residential Instability brings up many articles discussing psychological problems associated with it in Google and Google Scholar.

Cotton, B. P. &amp; Schwartz-Barcott, D. (2016). Residential Instability Among Low-Income Families: A Concept Analysis. Archives of Psychiatric Nursing 30(2): 257-261. doi: 10.1016/j.apnu.2015.11.006 pmid: 26992880
Residential instability is relatively common among low-income families and is associated with a host of negative outcomes, especially for children and adolescents. Psychiatric nurses, especially those in the advanced practice role, observe the consequences of residential instability within the clinical setting. Yet, to-date, the concept is somewhat vague and its essential meaning and definition remain unclear.