McKenna O'Donnell

Frederic Bastiat was an influential economic writer of the middle 1800s. In his work,Economic Sophisms (1848), Bastiat proposed a dual system of ethics, containing economic ethics and religious ethics.Bastiat first described the tendency of individuals toward plunder as a means of satisfying their economic needs. Men, he held, could work and produce what they needed by toil, but history had shown that men preferred to take what they could from others who had toiled. Bastiat identified two main types of plunder — force and fraud.

As contribution to a recent debate (James, 1998; Murphy etal., 1997, 1998) the proportion of twins following ovulation induction (OI) or assisted conception (AC) in 1994 in Oxfordshire and West Berkshire was estimated, and by extrapolation the natural twinning rate in England and Wales was judged to have maintained a plateau phase since the 1970s. Similar figures for 1995 and 1996 from the same study, and hence a more stable local estimate, are now provided. The proportions, as before, were estimated from women's responses to a questionnaire within a case[hyphen]control study, with ascertainment from general practitioners' records or hospital case[hyphen]notes for non[hyphen]responders or for those excluded from the study originally. In 1994, 1995 and 1996 the proportion of twins following OI/AC was overall 27% (24%, 30% and 27% respectively). Restriction to the 87% locally resident made no difference. The national crude twinning rate for those years was overall 13·3 per 1000 maternities (12·8, 13·6 and 13·4 respectively)