Relative Fertility
نویسندگان
چکیده
منابع مشابه
Relative Wage Changes and Timing of Fertility
The U.S. wage structure experienced substantial changes due to energy price shocks, increased international competition, and technological change. Katz and Murphy (1992) among others have argued that these changes reflected a rise in demand for more skilled workers and also females. In this paper I use these types of relative wage changes to identify the effects of women’s wages and husbands’ e...
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In this paper by use of mathematical modeling of an observer [14,15] the notion of relative information functional for relative dynamical systemson compact metric spaces is presented. We extract the information function ofan ergodic dynamical system (X,T) from the relative information of T fromthe view point of observer χX, where X denotes the base space of the system.We also generalize the in...
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The role of mating systems and alternative sexual strategies is fundamental to the study of sexual selection theory. Although they conflict with the traditional view of females as the coy sex, recent studies have revealed that females of different taxa often mate with several different males within one reproductive bout (Schenk & Kovacs 1995; Zane et al. 1999; Lank et al. 2002; Prosser et al. 2...
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Yield and nutrient acquisition advantages are frequently found in intercropping systems. However, there are few published reports on soil fertility in intercropping relative to monocultures. A field experiment was therefore established in 2009 in Gansu province, northwest China. The treatments comprised maize/faba bean, maize/soybean, maize/chickpea and maize/turnip intercropping, and their cor...
متن کاملThe predictive value of routine semen evaluation and IVF technology for determining relative boar fertility.
Practical techniques for assessing semen quality in order to predict male fertility are still needed. The principal objective of this experiment was to evaluate routine laboratory evaluation and in vitro fertilization (IVF) techniques as predictors of relative boar fertility using a low-dose AI protocol. Nine boars were evaluated during a 6.5+/-1 mo period, beginning at 29-32 wk of age. Ejacula...
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ژورنال
عنوان ژورنال: The Boston Medical and Surgical Journal
سال: 1922
ISSN: 0096-6762,1533-4406
DOI: 10.1056/nejm192203231861204