As of March 31, 1987, the U.S. Centers for Disease Control had reported 33,350 cases of acquired immune deficiency syndrome. Yet by that date, physicians had actually diagnosed 42,670 cases. The difference arises from significant delays in the reporting of AIDS cases to public health authorities. An estimated 70% of cases are reported two or more months after diagnosis; about 23% are reported s...

Background The issue of formaldehyde exposure in homes is long-standing and has been studied over time. Formaldehyde is frequently used in plywood, fiberboard, resins, glues, and several other construction components. In the past, formaldehyde was also used in insulation of many homes. In March of 1982, the U.S. Consumer Product Safety Commission (CPSC) called for a ban on urea foam formaldehyd...

"The Science and Politics of Comparing Women and Men" (Eagly, March 1995) raised an important question: What constitutes a practically significant sex effect? The practice of relying on proportion of variance measures (e.g., r 2, tt~ 2) to address this question has been judged inappropriate, for such measures are not intuitively accessible and can mislead researchers into ignoring the practical...

Two soil extraction methods were compared to determine their efficiency in recovering cysts and juveniles of a tobacco cyst nematode, Globodera tabacum solanacearum. The methods were equally efficient when extracting nematodes from soil samples seeded in the laboratory; however, there was a significant extraction method x month interaction when the methods were used to estimate field soil popul...

Topology Broadcast based on Reverse-Path Forwarding (TBRPF) is a proactive, link-state routing protocol designed for use in mobile ad-hoc networks. TBRPF has two modes: full topology (FT) and partial topology (PT). TBRPF-FT uses the concept of reverse-path forwarding to reliably and efficiently broadcast each topology update in the reverse direction along the dynamically changing broadcast tree...

This study investigates when forced sales turn into fire sales by using a natural experiment which allows us to separate supply and demand effects: Forced sales result from sudden death of house owners and are thus unrelated to current market conditions. We find that forced sales result in fire sale discounts. Discounts increase when the sale is urgent, market conditions are poor, the seller is...

BACKGROUND Survival analysis is a standard methodology to assess progress in oncology disease treatment. However, survival analysis commonly only measures survival during the treatment period (and the period immediately afterwards), and does not provide an estimate of life expectancy, which is often of more interest to patients and to health policy makers. In this paper we propose a method to e...

Received for publication 12 March 1982 and in revised form 9 June 1982. Dr. Angelin is the recipient of a research fellowship from the Ernst Klenk Foundation. well as total bile acids were well correlated with those in portal venous serum. The results (a) give a quantitation of postprandial bile acid inflow to the liver and (b) indicate that the hepatic uptake system for bile acids in healthy m...