Demographic counts are based on estimates of population density, which vary from between 25 to 40 people per dunam (about 11,000 square yards or 900 square meters) for settled sites. For a recent demographic study of Iron Age Israel, see Magen Broshi and Israel Finkelstein, “The Population of Palestine in Iron Age II,” Bulletin of the American Schools of Oriental Research 287 (August 1992), pp. 47–60.