Wolfe wrote in the Village Voice that “to take their theory to its logical conclusion would be to develop Central Park. . . . When you consider the thousands and thousands of people who could be housed in Central Park if they would only allow them to build it up, boy, the problem is on the way to being solved!” But building high-rises in dense neighborhoods means that you don’t have to build in green areas, whether they’re urban parks or undeveloped areas far from the city. In fact, a true preservationist should realize that building up in one area reduces the pressure to take down other buildings. Once the landmarks commission decides that a building can be knocked down—as was the case in the Battle of Carnegie Hill—it should logically demand that its replacement be as tall as possible. Does turning a neighborhood into a historic district actually discourage new construction, as these stories suggest? To find out, I couldn’t simply use data from the U.S. Census to see if regular districts boasted more housing growth than historic districts did, because historic districts don’t match up exactly with census tracts. So I have made comparisons among three kinds of census tracts: those that have no territory within a historic district; those that have some; and those with a majority of land in a historic district.