I wish to express my gratitude to all those who have contributed to this volume. Foremost are the authors of various chapters, since without their efforts this book would not have been possible.
I am also indebted to Dr. Lawrence E. Gary, director of the Institute for Urban Affairs and Research, Howard University. In the fall of 1984, when I solicited his support for this project, he embraced the idea unhesitatingly. With the approval of Vice President Michael R. Winston, Dr. Gary appointed me as senior research associate at the Institute to enable me to use the Institute's resources. The support of other Institute staff, especially Dr. Diane R. Brown, director of the Housing and Community Development Studies Center, is highly appreciated.
I am grateful to my wife, Mahvash, for her cheerful patience and her taking care of various family chores while I was totally devoted to this and another forthcoming book. There is no way that I can repay them, but I am deeply indebted to my two sons, with whom I hardly had any time to spend while working on this project.