首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Back in 1975, economists plotted rising life expectancies against countries’ wealth, and concluded that wealth itself increases
Back in 1975, economists plotted rising life expectancies against countries’ wealth, and concluded that wealth itself increases
admin
2020-02-09
75
问题
Back in 1975, economists plotted rising life expectancies against countries’ wealth, and concluded that wealth itself increases longevity. It seemed self-evident: everything people need to be healthy—from food to medical care— costs money.
But soon it emerged that the data didn’t always fit that theory. Economic upturns didn’t always mean longer lives. In addition, for reasons that weren’t clear, a given gain in gross domestic product (GDP) caused increasingly higher gains in life expectancy over time, as though it was becoming cheaper to add years of life. Moreover, in the 1980s researchers found gains in literacy were associated with greater increases in life expectancy than gains in wealth were. Finally, the more educated people in any country tend to live longer than their less educated fellow citizens. But such people also tend to be wealthier, so it has been difficult to untangle which factor is increasing lifespan.
Wolfgang Lutz and his colleagues have now done that by compiling average data on GDP per person, lifespans, and years of education from 174 countries, dating from 1970 to 2010. They found that, just as in 1975, wealth correlated with longevity. But the correlation between longevity and years of schooling was closer, with a direct relationship that did not change over time, the way wealth does. When the team put both these factors into the same mathematical model, they found that differences in education closely predicted differences in life expectancy, while changes in wealth barely mattered.
Lutz argues that because schooling happens many years before a person has attained their life expectancy, this correlation reflects cause: better education drives longer life. It also tends to lead to more wealth, which is why wealth and longevity are also correlated. But what is important, says Lutz, is that wealth does not seem to be driving longevity, as experts thought—in fact, education is driving both of them.
He thinks this is because education permanently improves a person’s cognitive abilities, allowing better planning and self-control throughout the rest of their life. This idea is supported by the fact that people who are more intelligent appear to live longer.
Why has it been difficult to decide which factor is increasing lifespan according to Para. 2?
选项
A、Because less educated people tend to be icher.
B、Because more educated people tend to live longer.
C、Because less educated people tend to live longer.
D、Because more educated people tend to be richer.
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/l8p7777K
0
大学英语四级
相关试题推荐
InasurveyconductedbyresearchfirmHarrisInteractive,71%ofAmericanssaidthatspendingextramoneyontravelduringthe
There’sNoPlaceLikeHome[A]Onalmostanynightoftheweek,Churchill’sRestaurantishopping.The10-year-oldhotspotinRo
A、Becausethosechildrencouldnotprovetheyregularlyatethere.B、Becausemostofthosechildrenarehealthy.C、Becauseconsu
A、Peopletendtobeasleeponthetrains.B、Peopleusuallyreadnewspapersthere.C、Theyalwaysleaveandarriveontime.D、Ther
Low-carbonFuture:WeCanAffordtoGoGreen[A]Tacklingclimatechangewillcostconsumerstheearth.Thosewhocampaignfora
Herecomesthee-bookrevolutionA)Atwhattemperaturedoelectronicbookscatchfire?We’regoingtofindoutsometimethi
Afriendofmine,inresponsetoaconversationwewerehavingabouttheinjusticesoflife,askedmethequestion:"Whosaidli
AnewreportreleasedbytheAmericanFederationofTeachers(AFT)remindsusofatopiceducationwritersalmostneveraddress—
Theearliestprocessofmakingpaperwasdonealmost5,000yearsagoinEgyptandtheNileValley.Inthosedays,paperwasmade
A、It’sstillonthehorizon.B、It’sfarfromenteringtheirlife.C、It’salreadyherewiththem.D、It’sonlyabeautifuldream.
随机试题
公诚以都虞侯命某者,能为公已乱。
根据f(x)的导函数fˊ(x)的图象(如图所示),判断下列结论正确的是【】
简述甲状腺功能亢进突眼患者的眼部护理措施。
有关大面积烧伤病人切痂植皮术正确的是
某工程,在招标过程中,发生如下事件。事件1:招标文件中规定,投标单位在收到招标文件后,若有问题需要澄清,只能以书面形式提出,招标单位将答复只可以书面形式送给提出问题的投标单位。事件2:招标文件中规定,从招标文件发放之日起,在15日内递交投标文件。事件
注册商标的有效期为()。
我国进出口贸易术语的选择应考虑哪些因素?
某供热食业房产原值8000万元,占用土地10000平方米。2008年全年经营收入9000万元,其中向居民供热收入300万元,无法准确划分向居民供热的生产用房占地。该企业所在地计算房产余值的减除比例为20%,城镇土地使用税年税额为3元/平方米。2008年该企
()是日本传统的具有很强艺术性和文学性的短诗,由五一七一五共17个音节组成。
设曲线y=x2+ax+b与曲线2y=xy3一1在点(1,一1)处切线相同,则().
最新回复
(
0
)