Is Urban Infill Helpful Or Harmful?

"Of course, outlying growth will continue, and certainly it can be done more efficiently. Certainly green space in poorer, older inner-ring areas should be valued highly and older homes that are structurally sound should be preserved and rehabilitated. And there is no doubt that infill development frequently involves gentrification, which can lead to displacement of low- and moderate-income people, and that city officials should be extremely sensitive to that issue when they court infill as a means of increasing tax base."