New Orleans has a far greater proportion of vacant homes than any other city in the country, due in large part to a lagging recovery in about a third of the neighborhoods that were badly damaged by Hurricane Katrina, new analyses show. The nonprofit Greater New Orleans Community Data Center released two reports Thursday, one of which used U.S. Postal Service data compiled in March to compare New Orleans with seven other American cities that have large inventories of blighted or vacant housing. When it comes to abandoned homes, New Orleans is in a class by itself, the report indicated,...