منابع مشابه
A Toy Model of the Rat Race
We introduce a toy model of the “rat race” in which individuals try to better themselves relative to the rest of the population. An individual is characterized by a real-valued fitness and each advances at a constant rate by an amount that depends on its standing in the population. The leader advances to remain ahead of its nearest neighbor, while all others advance by an amount that is set by ...
متن کاملEnhancement and Obsolescence: Avoiding an "Enhanced Rat Race".
A claim about continuing technological progress plays an essential, if unacknowledged, role in the philosophical literature on "human enhancement." I argue that-should it eventuate-continuous improvement in enhancement technologies may prove more bane than benefit. A rapid increase in the power of available enhancements would mean that each cohort of enhanced individuals will find itself in dan...
متن کاملRodent models in neuroscience research: is it a rat race?
Rodents (especially Mus musculus and Rattus norvegicus) have been the most widely used models in biomedical research for many years. A notable shift has taken place over the last two decades, with mice taking a more and more prominent role in biomedical science compared to rats. This shift was primarily instigated by the availability of a much larger genetic toolbox for mice, particularly embry...
متن کاملLumped Element 180 Wilkinson Dividers and a Rat-Race Divider
-A lumped element 180 Wilkinson divider consisting of 11 elements was presented in 2003. It used a conventional Wilkinson divider, a -90 and a +90 phase shifter of πand T-type. In this paper, that of 10 elements is newly presented. Frequency characteristics of the two 180 Wilkinson dividers and those of a rat-race divider known as an out of phase circuit are discussed. Key-Words: Wilkinson divi...
متن کاملA Quantitative Rat Race Theory of Labor Market Dynamics
A fundamental puzzle for productivity driven business cycle theories is that labor productivity and hours are negatively correlated. I refine the empirical puzzle and provide a theory to account for it. I emphasize that hours per worker and individual hours relative to usual hours move counter to productivity. In the cross-section, I find that almost all workers increase their hours when produc...
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ژورنال
عنوان ژورنال: Nature
سال: 1974
ISSN: 0028-0836,1476-4687
DOI: 10.1038/249008c0