منابع مشابه
High Hopes and Disappointment
We study preferences for which choosing high expectations about the future make us happy now but make us unhappy later if they are not realized. These preferences generalize the recursive utility of Kreps-Porteus and Epstein-Zin. Like recursive utility agents, our agents care about the time resolution of uncertainty, but our agents are not purely forward-looking. For example, two agents with th...
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This paper presents 3600—5400Å integrated spectra of 19 globular clusters (or candidates) projected on the central regions of M 31, r ≤ 5.3 ′ (≈1.2 kpc). We check the cluster nature of these objects, and derive their ages, metallicities and reddenings. From the initial sample , 16 objects turn out to be true star clusters, two are Galactic dwarf stars, and one is a high redshift background gala...
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ژورنال
عنوان ژورنال: Nature
سال: 1990
ISSN: 0028-0836,1476-4687
DOI: 10.1038/345375a0