A Funky fresh Fordham University professor is rapping about rent to warn the Bronx about gentrification. But housing and census experts believe the borough has nothing to fear.

Mark Naison, who rhymes under the stage name Notorious PhD, [performed] "Not in the Bronx" Thursday at the Urban Plunge, an annual community service event just for Fordham freshmen.

The history scholar has watched yuppies and hipsters transform parts of Brooklyn and Harlem, crowding out longtime residents and wants Fordham students to help protect the Bronx....