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
2019-04-27
40
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/dkZ7777K
0
大学英语四级
相关试题推荐
A、Bydecoratingourhomes.B、Bybeingkindandgenerous.C、Bywearingfashionableclothes.D、Byputtingonalittlemake-up.B题目
A、Theytendtoreproducemore.B、Theymayshowmoresignsofviolence.C、Theycaneatandsleepbetter.D、Theymaycommitsuicid
ItisnotoftenrealizedthatwomenheldahighplaceinsouthernEuropeansocietiesinthe10thand11thcenturies.Asawife,
AnewreportreleasedbytheAmericanFederationofTeachers(AFT)remindsusofatopiceducationwritersalmostneveraddress—
A、HelikesSwedenbetterthanEngland.B、Heprefershotweathertocoldweather.C、HeisanEnglishmanlivinginSweden.D、Hevi
Weallknowthatemotionsoriginateinthebrain.Butweusuallytalkaboutouremotionscomingfromourhearts.Ifsomeoneyou
Weallknowthatemotionsoriginateinthebrain.Butweusuallytalkaboutouremotionscomingfromourhearts.Ifsomeoneyou
A、HelikesSwedenbetterthanEngland.B、Heprefershotweathertocoldweather.C、HevisitsLondonnearlyeverywinter.D、Heis
A、Sleepingproblems.B、Stomachproblems.C、Bademotions.D、Highbloodpressure.B短文提到,长期过量喝咖啡会导致胃部和牙齿出现问题。B对应其中一个负面影响,故正确。
A、GreatBritain.B、France.C、Australia.D、CanadaandtheUS.D事实细节题。本题问的是短道速滑运动起源于什么地方。短文开始部分明确提到,短道速滑运动于1905年起源于加拿大和美国。
随机试题
请论述艾青诗歌的主要思想内容、独特的情调以及在诗歌艺术上的独特建树。
女性,26岁,1型糖尿病。中断胰岛素治疗3天突发昏迷,血糖33.3mmol/L,pH值7.2,尿糖、尿酮强阳性。治疗选择
下列属于人工主动免疫制剂的是
以下血清学肿瘤标志物中,对诊断肝癌有意义的是
拆除大跨度梁支撑柱时,一般先从两端开始向跨中对称进行。()
成本逼近法评估土地价格的公式应该为()。
在使用白棕绳时,如绳不够长需接长时,应采用________法。()
银行不能为监管人员安排食宿。如果确需要提供,则银行业从业人员可以为其报销因公费用。()
酒店公寓的管理服务形象包括()
改变积分次序∫01dxf(x,y)dy=________.
最新回复
(
0
)