The economy has been anything but kind to the world of New York real estate, and to the real estate market in general – but the shocking statistic above emphasizes just how bad things are. Though market reports have seemingly shown that things are on the upswing, Crain’s claims that currently, over 4,000 new luxury apartments are sitting vacant and unused here in New York City. Even worse, these units are in 138 condo buildings that owe the city a total of $3.8 million in back taxes. Interestingly, in a …