منابع مشابه
Can we bury global warming?
When William Shakespeare took a breath, 280 molecules out of every million entering his lungs were carbon dioxide. Each time you draw breath today, 380 molecules per million are carbon dioxide. That portion climbs about two molecules every year. No one knows the exact consequences of this upsurge in the atmosphere’s carbon dioxide (CO2) concentration nor the effects that lie ahead as more and m...
متن کاملCan We Count on Global Health Estimates?
This week PLoS Medicine publishes a cluster of articles discussing the current state of global health estimates and debating the way into the future [1–5]. Estimates of global health indicators— which give insight into death and disease rates, document advances in health and development, and help policymakers monitor progress—are a necessary evil. They are absolutely essential to improving glob...
متن کاملPutting our money to good use: Can we attract more passengers without increasing subsidies?
This paper evaluates the policy of Swedish public transport authorities, determining whether the number of trips on local public transport could have been increased without increasing subsidies. Based on annual data from Swedish counties, the evaluation found that between 1986 and 2001 public transport fares exceeded the passenger-maximizing fare most of the time in all but two counties, the av...
متن کاملDisentangling Disadvantage: Can We Distinguish Good Teaching from Classroom Composition?
This paper investigates the use of teacher value-added estimates to assess the distribution of effective teaching across students of varying socioeconomic disadvantage in the presence of classroom composition effects. We examine, via simulations, how accurately commonly-used teacher-value added estimators recover the rank correlation between true and estimated teacher effects and a parameter re...
متن کاملGood news on dementia prevalence—we can make a difference
1384 www.thelancet.com Vol 382 October 26, 2013 The fi ndings of the Cognitive Functioning and Ageing Study (CFAS) I and II are unequivocally good news. New data, reported in The Lancet, suggest that the prevalence of dementia in the UK in 2011 was signifi cantly lower than would have been expected based on the estimated prevalence in 1991. For CFAS I, data were taken from three geographical ar...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Communications of the ACM
سال: 2018
ISSN: 0001-0782,1557-7317
DOI: 10.1145/3264623