人口替换率是指：为使一个国家或某个区域在人口上出生与死亡达到某种相对的平衡而产生的一个比率：即每个妇女平均生小孩的个数，去扭转失调或保持平衡状态。参考资料：据自己的理解
replacement ratepopulation growth rateThis paper uses an overlapping generations model to investigate the urban public pension in China. It examines the effects of the replacement rates and population growth rate on the capital–labor ratio, pension benefits, consumption and utility, and finds the ...
The meaning of REPLACEMENT is the action or process of replacing : the state of being replaced. How to use replacement in a sentence.
The term "replacementlevel fertility" is used to describe the total fertility rate of a population—in other words, the average number of children born per woman at which a population exactly replaces itself from one generation to the next without migration. A number of studies have attempted t...
Fertility Rate | Definition, Calculation & Importance from Chapter 11 / Lesson 22 49K Understand the meaning of fertility rate in biology, discover the formula for calculating the fertility rate, and know why the fertility rate is important. Related...
C, For an NUFrate greater than 1.75 mL/kg/h compared with an NUFrate from 1.01 to 1.75 mL/kg/h, the risk of death was 44% for day 7 to 12, 42% for day 13 to 26, and 77% for day 27 to 90. D, Every 0.50-mL/kg/h increase in NUFrate was associated with death: 5% for...
Thus, we argued that the HbS mutation did not originate at random and did not begin a process of adaptation by natural selection, but rather a long-term evolutionary process preceded it that has led to its increased rate of origination in the gene and population where it is of adaptive ...
This new Brookings Institution study shows that when rising government benefits are taken into account, the poverty rate drops to only about a third what it was in 1980 -- meaning tremendous progress. If poverty is easing and federal benefits are a main reason, why don't liberals...
” The story details how companies like Tyson are struggling to fill what theycharacterize as “unpleasant jobs”with a US unemployment rate of 3.9%. As a result, the meatpacker is joining the nonprofitTent Partnership for Refugeeswith a plan to hire some of the nearly200,000 migr...
The postprescription vs preprescription rate ratio for nonfatal acute myocardial infarction was 1.36 (95% CI, 1.03-1.81).7 Serum testosterone levels were not available, and the analysis was not restricted to those with a diagnosis of androgen deficiency; therefore, these results may not be ...