She married David Victor Glass, a sociologist and demographer, in 1942. Samuel Hulse Preston (born December 2, 1943) is an American demographer and sociologist. Malthus was a demographer before he was ever considered an economist. Professor Costa is an economic historian and demographer who teaches at UCLA. Eberstadt is married to author and demographer Nicholas Eberstadt. The study was criticised by Sergio DellaPergola, a demographer at the Hebrew University of Jerusalem. According to demographer Pini Herman, this circular migration has been an economic boon to Israel. Russian demographer Rybakovsky found a wide range of estimates for total war dead. This claim is supported by the work of demographer Nathan Keifitz. Those who opposed the ratification included the demographer Emmanuel Todd.