When compared to the cost of buying an apartment in Manhattan, rental prices in the borough aren’t actually that bad. A study released on Friday by the Federal Reserve Bank of New York says that apartment prices in New York City have risen considerably faster than rents have in recent years. This split has raised some serious questions about the outlook for housing prices in the city as well as the sustainability of current prices. “Manhattan price-rent ratios, although off their 2008 highs, are still up dramatically over the past two decades, suggesting less financial ‘value’ today in an apartment purchase there,” said New York Fed economist Jason Bram, writing in the bank’s Current Issues in Economics and Finance.