More for less. That is a great economic equation. Restaurants do it all the time, gradually raising prices while giving diners progressively smaller portions of food until the falsetto begins. In the apartment business, it is working a little differently. Reis has reported that U.S. apartment vacancies have risen for the first time in five years, but rent growth has not subsided, nor will it subside during 2015, according to a 2015 multifamily forecast from Pierce-Eislen.