Reviews

Babi and Baha'i Religions: From Messianic Shi'ism to a World Religion, by Peter Smith, Cambridge University Press, London, New York, New Rochelle, Melbourne, Sydney 1987, pp.xiv, 243.

Panj Vaqf‐namah, by Mahmud Afshar Yazdi, (Five Endowment Deeds), Tehran Foundation for Mahmud Afshar Yazdi's Endowments, 1363/1984. Iraj Afshar and Karim Isfahaniyan, eds., Namvarah‐yi Doktor Mahmūd Afshar Yazdi (Mahmud Afshar Yazdi's Festschrift), 4 vols., Tehran: Foundation for Mahmud Afshar Yazdi's Endowments, 1364/1985–1367/1988.

Bulles et Sceaux sassanides de diverses collections, by Philippe Gignoux and Rika Gysclen, Paris: Sludia Iranica, Cahier 4, Association Pour l'avancemeni des études iraniennes, 1987, 306 pp, 23 plates.

Iran and Iraq at War , by Shahram Chubin and Charles Tripp, Boulder, Colorado: Westview Press, 1988.

The Tragedy of Sohrab and Rostam, from the Persian National Epic, the Shahnameh of Abol‐Qascm Ferdowsi, translated by Jerome W. Clinton, Seattle: The University of Washington Press, 1988, xxv + 190 pages, $25.00 cloth $12.50 paper.

Persian Carpets , by Michael Craig Hillmann, Austin: University of Texas Press, 1984, 98 pp. index to p. 112.

Resurrection and Renewal: The Making of the Babi Movement in Iran, 1844–1850, Abbas Amanat, Ithaca & London: Cornell University Press, 1989, pp. xv.+ 461, no price indicated.

Iran min al‐Dakhil, (Iran From Within), by Fahmi Huwaydi, Cairo: Markaz al‐Ahram li al‐tarjuma wa al‐nashr, 1987, 405 pp.

Woven From the Soul, Spun from the Heart: Textile Arts of Safavid and Qajar Iran, 16lh‐19lh Centuries , edited by Carol Bier, Washington, DC: The Textile Museum, 1987.

Summon Up Remembrance, by Marzich Gail, Oxford: George Ronald Books, 1987, 295 pp., appendix, bibliography, $14.95.

Iran and The United States, A Cold War Case Study, by Richard W. Cottam, Pittsburgh: University of Pittsburgh Press, 1988. $12.95 pb.     

MULTICOLLINEARITY IN REGRESSION MODELS WITH MULTIPLE DISTANCE MEASURES*

ABSTRACT. In a polycentric urban context, several urban nodes may exert an influence over land rents. Where this is the case, regression analysis to explain land rents should employ distance variables corresponding to each of the urban nodes. However, these distance measures may be highly intercorrelated, thereby posing a problem of “spatial multicollinearity.” This paper demonstrates that problems arising from spatial multicollinearity can be avoided or substantially lessened by carefully selecting the geographic domain from which observations are drawn.