THIS STUDY IS AN IN-DEPTH ANALYSIS OF THE CONSEQUENCES OF SLUM OWNERSHIP AND THE IMPACT OF THE MARKET ON THE MAINTENANCE AND REHABILITATION OF SLUM TENEMENTS. DATA ARE DRAWN FROM LAND PARCEL STATISTICS AND LANDLORD INTERVIEWS IN NEWARK, N.J. THE STUDY DESCRIBES THE MEASURES NEEDED TO INITIATE SLUM REHABILITATION. PARTICULAR ATTENTION IS GIVEN TO OWNERSHIP PATTERNS, THE RELATION OF THE ACQUISITION PROCESS TO SLUM MAINTENANCE, THE WEAKENED MARKET STRUCTURE, TENANTS AND REHABILITATION, FINANCING, TAXES, CODE ENFORCEMENT, URBAN RENEWAL AND REHABILITATION, AND NEW GOVERNMENT PROGRAMS. IT IS FELT THAT THERE IS CONSISTENT EVIDENCE THAT THE WEAKENING OF THE SLUM REALTY MARKET IS CAUSING PRESENT MAINTENANCE PROCEDURES TO DEGENERATE. DATA ARE PRESENTED IN EXTENSIVE CHARTS AND TABLES. THIS DOCUMENT IS PUBLISHED BY THE URBAN STUDIES CENTER AT RUTGERS, THE STATE UNIVERSITY, NEW BRUNSWICK, NEW JERSEY. (NC)