Negative urban rent, use value and urban regeneration policies. The case of Sardinia

The essay, in the first part, deals with the case of centres in demographic decline from the point of view of urban rent. It analyses how urban expansion has produced a negative differential rent that eroded the wealth linked to real estate. Properties have lost market value, but still maintain a value in use. The second part reasons on some urban regeneration policies based on this value. The case study is that of Sardinia.