نتایج جستجو برای: contributions donations
تعداد نتایج: 119312 فیلتر نتایج به سال:
We study how competition among charities affects individuals’ giving behavior. We characterize a situation where a higher rebate subsidy shifts donations from one charity to another and increases total donations. We conduct two experiments: (i) individualized charitable giving where free riding incentives are shut down; and (ii) multi-donor charitable giving. We derive the demand for giving at ...
We experimentally study the transparency effect of alternative campaign finance systems on donations, election outcomes, policy choices, and welfare. Three alternatives are considered: one where donors’ preferences and donations are unobserved by the candidate and public; one where they are observed by the candidate but not the public; and one where they are observed by all. We label them full ...
Chikungunya virus (CHIKV) caused large epidemics throughout the Caribbean in 2014. We conducted nucleic acid amplification testing (NAAT) for CHIKV RNA (n = 29,695) and serologic testing for IgG against CHIKV (n = 1,232) in archived blood donor samples collected during and after an epidemic in Puerto Rico in 2014. NAAT yields peaked in October with 2.1% of donations positive for CHIKV RNA. A to...
background: increasing cost of cancer in the world and particularly in developing countries, postulates need for public participation in cancer control activities, including prevention, treatment and supportive care. we studied role of different factors on the success of advertising through short message services (sms) for public donations for cancer control activities. materials and methods: b...
BACKGROUND The tobacco industry uses various strategies to promote itself as a socially responsible, ethical industry, including establishing links with health institutions and medical research. The purpose of this study was to identify the relationships between the tobacco industry and Canadian faculties of medicine, specifically research funding and donations from tobacco industry sources, an...
Abstract The impacts of money in US politics have long been debated. Building on principal-agent models, we test whether and to what degree companies’ political donations lead their favored treatment federal procurement. We expect the impact favoritism vary by strength control principals over bureaucratic agents. compile a comprehensive dataset published contracts registered campaign contributi...
BACKGROUND Seasonal distribution of blood donation hinders efforts to provide a safe and adequate blood supply leading to chronic and persistent shortages. This study examined whether holidays, geographical area and donation type (community versus replacement) has any impact on the fluctuation of donations. METHODS The numbers of blood donations from 2007 through 2010 in three Brazilian Retro...
Background: Modeling is one of the most important ways for explanation of relationship between dependent and independent response. Since data, related to number of blood donations are discrete, to explain them it is better to use discrete variable distribution like Poison or Negative binomial. This research tries to analyze numerical methods by using neural network approach and compare ...
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