نتایج جستجو برای: طبقهبندی ژل o15
تعداد نتایج: 6549 فیلتر نتایج به سال:
This paper examines the economic status and labour supply of older workers in Chile. It examines the extent to which the labour market is an important source of economic risk diversification for older workers and their households, and the influence of alternative sources: the family, social security, and accumulated assets. The main findings are firstly that there are important differences by a...
Primers specific for Escherichia coli O15:K52:H1 were devised based on a novel single-nucleotide polymorphism identified within the housekeeping gene fumC, i.e., G594A. In experiments comparing various reference typing methods, the new primers provided 100% sensitivity and specificity for the O15:K52:H1 clonal group, including 162 diverse clinical and reference E. coli isolates.
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We present experimental evidence on the impact of a school choice program in the Indian state of Andhra Pradesh (AP) that provided students with a voucher to finance attending a private school of their choice. The study design featured a unique two-stage lottery-based allocation of vouchers that created both a student-level and a market-level experiment, which allows us to study both the indivi...
In this paper, we investigate the determinants of political instability in Latin America. In a panel of 18 Latin American countries from 1971 to 2000, we find that democratic countries experience less average instability in the region, indicating that the move to increased democracy in the last couple decades may alleviate the persistent problem of instability in the area. We also find that inc...
We study whether a sudden increase of the price of rice supplied by the Indian Public Distribution System in Andhra Pradesh, a large Indian state, had a negative impact on child nutrition. A few months after the price increase, a health survey started to record weight for a large sample of children. The data collection continued for several months, so that children measured later lived for a lo...
This paper investigates potential measurement error biases in poverty transition matrices. We compare transition matrices based on survey consumption data to measurement-error-free simulated consumption, which is built on initial conditions and parameters estimated from a basic consumption dynamics model allowing for measurement error. We nd that measurement error in consumption data magni es ...
When we take a cab we may feel cheated if the driver takes an unnecessarily long route despite the lack of a contract or promise to take the shortest possible path. Is the behavior of the driver affected by beliefs about our cheating notions, and where do his beliefs come from? For that matter, where do our cheating notions come from, and how do they color our own decisions? We address these qu...
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