منابع مشابه
Germany goes for solar
Albert Einstein discovered the theoretical foundations on which photovoltaic cells are based a hundred years ago — it was a spin-off from his annus mirabilis. Half a century ago, Bell labs built solar cells out of silicon, which soon came to be used in space flight. But the real breakthrough in solar cells was neither theoretical, nor experimental. It was a simple pecuniary reward. Since the 19...
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This paper compares the non-marital birth pattern in France and West Germany. Since the beginning of the eighties, France witnessed a steady increase in non-marital birth rates, while in West Germany non-marital birth rates have remained at a relatively low level. We attribute these differences to the institutional and legal constraints from both sides of the Rhine which hamper or foster childb...
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Author affi liations: Centre de Recherche et de Veille sur les Maladies Émergentes dans l’Océan Indien, Ste. Clotilde, La Réunion, France (E. Lagadec, Y. Gomard, V. Guernier, M. Dietrich, H. Pascalis, S. Temmam, P. Tortosa, K. Dellagi); Université de Lyon, Villeurbanne, France (E. Lagadec, S. Temmam); Université de La Réunion, St. Clotilde (M. Dietrich, P. Tortosa); Université d’Antananarivo, A...
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Some 20 years after unification, the contrast between East and West Germany provides a unique natural experiment for studying the persistence of communist-era family patterns, the effects of economic change, and the complexities of the process of fertility postponement. After unification, fertility rates plummeted in the former East Germany to record low levels. The number of births per year fe...
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Some 20 years after reunification, the contrast between East and West Germany offers a natural experiment for studying the degree of persistence of Communist-era family patterns, the effects of economic change, and fertility postponement. After reunification, period fertility rates plummeted in the former East Germany to record low levels. Since the mid-1990s, however, period fertility rates ha...
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ژورنال
عنوان ژورنال: Nature
سال: 1977
ISSN: 0028-0836,1476-4687
DOI: 10.1038/269554b0