I wrote something for the POSTDOCket about , the National Postdoctoral Association (NPA) newsletter:
Spending time abroad as a postdoctoral scholar is widely considered to be a beneficial to an academic career– at least it is seen that way in Europe. At the same time, it can provide useful experience when transitioning to a career outside academia. Labs in the United States are generally seen as the most desired destinations for a foreign postdoc position. However, when you want a job in your home country afterwards, being abroad may seem like a disadvantage because it is harder to maintain your network and you may feel overlooked for an available position compared to somebody who stayed nearby. You may feel like you’re stuck abroad.