JOURNAL OF URBAN ECONOMICS <br/><br/>
NON-TECHNOLOGICAL INNOVATION IN URBAN TRANSIT .A COMPARISON OF SOME ALTERNATIVES 

 -    JANV.1978 
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<br/><br/>   NON-TECHNOLOGICAL INNOVATION IN URBAN TRANSIT .A COMPARISON OF SOME ALTERNATIVESA BIAS IN ESTIMATING URBAN POPULATION DENSITY FUNCTIONSZONING AND THE EXERCISE OF MONOPOLY POWER