منابع مشابه
Advertising bans ∗
I show that an advertising ban is more likely to increase rather than decrease total consumption when advertising does not bring about a large expansion of market demand at given prices and when it increases product differentiation (thus allowing firms to command higher prices). In this case, the main impact of a ban on advertising is to reduce equilibrium prices and thus increase demand. I arg...
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Background: Patients with a history of a fracture have an increased risk for future fractures, even in short term. The aim of this study was to assess the number of patients with falls and to identify fall risk factors that predict the risk of falling in the first three months after a clinical fracture. Methods: Prospective observational study with 3 months of follow-up in a large European acad...
متن کاملSecond-hand smoke in mental healthcare settings: time to implement total smoke-free bans?
BACKGROUND Second-hand smoke is associated with adverse health effects. Many countries have extended smoke-free policies to public buildings and workplaces such as hospitals, but mental health units have usually been exempted from complete smoke-free bans. The objective of this study was to evaluate second-hand smoke levels in mental health units with different types of smoking bans. Method We ...
متن کاملCamera Phone Bans Expected
Camera phone sales are expected to surge. Gartner, an IT research and advisory firm, predicts that sales will nearly double this year, from 80 million in 2003 to 150 million in 2004. The Zelos Group of Oyster Bay, N.Y., predicts that one-third of cell phone users will have camera phones in 2008. Most users will have phone cameras with VGA resolution clarity or less, according to Zelos Group. Bu...
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ژورنال
عنوان ژورنال: Nature
سال: 1989
ISSN: 0028-0836,1476-4687
DOI: 10.1038/339494b0