No, I don't think it is much of a factor. This happening in Brooklyn because of zoning changes and ease of commute to Manhattan. These areas of Brooklyn have more favorable commute times to Manhattan's business centers than even some parts of Manhattan. Think of how Windsor is to downtown Detroit then add 10 subway lines and a couple more bridges and tunnels. Then, on top of all that, there just isn't much room left to build or gentrify in Manhattan. Anything built in Manhattan now is basically for people with net worths of 8 figures or more.
But, why do I really discount crime rates? First, NYC's crime rates dropped dramatically in the late 90s but haven't really moved significantly since. There is no real visible change in the perception of crime today than since the early 2000s. Second, NYC's population was increasing again for two decades prior to when the crime rate peaked. Crime decline has never led gentrification here. If there is any relationship at all then it is most likely the opposite: gentrification may lead to decreases in crime rates.
What did happen over the last decade is that New York once again started to set new peak populations. It lost a huge number of residents in the 1950s - 1970s and then took from the 1970s - 2010s to recover the lost population. Now it is at a point again where New York is "bigger than it has ever been before." Again.
Bookmarks