Is Brooklyn getting poorer?

At the median, yes, according to Daniel Kay Hertz:

I recently ran across a post from data-crunching blog extraordinaire Xenocrypt, which noted that from 1999 to 2011, median household income in Brooklyn fell from $42,852 to $42,752…

Furthermore in large parts of Brooklyn real estate prices are falling.  You can read more here, with interesting pictures.

The pointer is from Hugo Lindgren.