412-46-18-36怎么才能简便运算_百度知道
412-46-18-36怎么才能简便运算
412-46-18-36怎么才能简便运算
我有更好的答案
com/zhidao/pic/item/a6efce1b9d16fdfa51bf7b63bd8f8c.jpg" target="_blank" title="点击查看大图" class="ikqb_img_alink"><img class="ikqb_img" src="http://g如图<a href="http://g.hiphotos.jpg" esrc="http.hiphotos.baidu.com/zhidao/wh%3D600%2C800/sign=6cab5e35dd3f28e22b22cc/a6efce1b9d16fdfa51bf7b63bd8f8c://g.hiphotos.baidu.com/zhidao/wh%3D450%2C600/sign=83f05aa607f41bd5da06e0f064eaadfd/a6efce1b9d16fdfa51bf7b63bd8f8c.baidu
采纳率：49%
来自团队：
400+12-40-6-30-6-18=400-40-30+12-6-6-18=312
为您推荐：
其他类似问题
&#xe675;换一换
回答问题，赢新手礼包&#xe6b9;
个人、企业类
违法有害信息,请在下方选择后提交
色情、暴力
我们会通过消息、邮箱等方式尽快将举报结果通知您。全部标记为已读
您暂未收到新消息哦~
扫我下载闲看视频APP
更快更超清，下客户端吧
手机总是耗电快？不用担心，关闭这2个开关，电量比原来更耐用！
手机的NFC功能，被大多人忽略，让你见识一下它有多强大！
杭州保姆纵火案因管辖权异议中止审理
你说你是不是没出息
印度童婚陋俗让人发指，8岁女童新婚，遭油腻老大叔辣手致死！
早餐怎么吃最健康？身边2种“短命”吃法，生病时候真后悔
马云的钱放在银行吃利息一年就66亿多，那么他到底有多少家底呢？
炸山炸出幽深山洞，金银珠宝堆满屋，现金缕玉衣轰动全国
出生两天新生儿长四只手四只脚，医生一看吓跳起
90后女孩开咖啡馆，教脑瘫孩子烘培
开始探索美美星球吧！From Wikipedia, the free encyclopedia
It has been suggested that this article be
into . () Proposed since November 2017.
Wealth in the United States is commonly measured in terms of , which is the sum of all , including the market value of real estate, like a home, minus all . The United States is the wealthiest country in the world.
U.S. Household and Non-Profit Net Worth 1959 - 2016, nominal and real (2016 dollars). It reached a record $93
in Q4 2016.
For example, a household in possession of an $800,000 house, $5,000 in mutual funds, $30,000 in cars, $20,000 worth of stock in their own company, and a $45,000 IRA would have assets totaling $900,000. Assuming that this household would have a $250,000 mortgage, $40,000 in car loans, and $10,000 in credit card debt, its debts would total $300,000. Subtracting the debts from the worth of this household's assets (900,000 - $300,000 = $600,000), this household would have a net worth of $600,000. Net worth can vary with fluctuations in value of the underlying assets.
As one would expect, households with greater income feature the highest net worths, though high income cannot be taken as an always accurate indicator of net worth. Overall the number of wealthier households is on the rise, with
hitting the highs of their careers. In addition, , with the wealthiest 25% of US households owning 87% of the wealth in the United States, which was $54.2 trillion in 2009.
U.S. household and non-profit organization net worth rose from $44.2 trillion in Q1 2000 to a pre-recession peak of $67.7 trillion in Q3 2007. It then fell $13.1 trillion to $54.6 trillion in Q1 2009 due to the . It then recovered, rising consistently to $86.8 trillion by Q4 2015. This is nearly double the 2000 level.
While income is often seen as a type of wealth in colloquial language use, wealth and income are two substantially different measures of economic prosperity. Wealth is the total number of net possessions of an individual or household, while income is the total inflow of wealth over a given time period. Hence the change in wealth over that time period is equal to the income minus the expenditures in that period. Income is a so called "" variable, while wealth is a so called "" variable.
Year-on-year change in total net worth of US households and nonprofit organizations , unadjusted for inflation or population change.
When observing the changes in the wealth among American households, one can note an increase in wealthier individuals and a decrease in the number of poor households, while net worth increased most substantially in semi-wealthy and wealthy households. Overall the percentage of households with a negative net worth (more debt than assets) declined from 9.5% in 1989 to 4.1% in 2001.
The percentage of net worths ranging from $500,000 to one million doubled while the percentage of millionaires tripled. From 1995 to 2004, there was tremendous growth among household wealth, as it nearly doubled from $21.9 trillion to $43.6 trillion, but the wealthiest quartile of the economic distribution made up 89% of this growth. During this time frame, wealth became increasingly unequal, and the wealthiest 25% became even wealthier.
According to US Census Bureau statistics this "Upward shift" is most likely the result of a booming housing market which caused homeowners to experience tremendous increases in home equity. Life-cycles have also attributed to the rising wealth among Americans. With more and more baby-boomers reaching the climax of their careers and the middle aged population making up a larger segment of the population now than ever before, more and more households have achieved comfortable levels of wealth. Zhu Xiao Di (2004) notes that household wealth usually peaks around families headed by people in their 50s, and as a result, the baby boomer generation reached this age range at the time of the analysis.
Household net worth fell from 2007 to 2009 by a total of $17.5 trillion or 25.5%. This was the equivalent loss of one year of GDP. By the fourth quarter of 2010, the household net worth had recovered by a growth of 1.3 percent to a total of $56.8 trillion. An additional growth of 15.7 percent is needed just to bring the value to where it was before the
started in December 2007. In 2014 a record breaking net worth of $80.7 trillion was achieved.
are known as the raw materials of wealth, and they consist primarily of stocks and other financial and non-financial property, particularly homeownership. While these assets are unequally distributed, financial assets are much more unequal. In 2004, the top 1% controlled 50.3% of the financial assets while the bottom 90% only held 14.4% of the total US financial assets.
These discrepancies exist despite the availability of many wealth building tools established by the Federal Government. These include 401k plans, 403b plans, and IRAs. Traditional IRAs, 401k and 403b plans are tax shelters created for working individuals. These plans allow for tax sheltered (or pre-tax) contributions of earned income directly to tax sheltered savings accounts. Annual contributions are capped to ensure that high earners cannot enjoy the tax benefit disproportionally. The Roth IRA is another tool that can help create wealth in the working and middle classes.
Assets in Roth IRA interests, dividends, and capital gains are all exempt from income taxes. Contributions to Roth IRAs are limited to those with annual incomes less than the threshold established yearly by the IRS. The benefits of these plans, however, are only available to workers and families whose incomes and expenses allow them excess funds to commit for a long period, typically until the investor reaches age 59 1/2 . The effect of these tools are further limited by the contribution limits placed on them.
such as skills, the United Nations estimated the total wealth of the United States in 2008 to be $118 trillion.
by net worth (2007). The net wealth of many people in the lowest 20% is negative because of debt. By 2014 the wealth gap deepened.
According to an analysis that excludes pensions and social security, the richest 1% of the American population in 2007 owned 34.6% of the country's total wealth, and the next 19% owned 50.5%. Thus, the top 20% of Americans owned 85% of the country's wealth and the bottom 80% of the population owned 15%. Financial inequality was greater than inequality in total wealth, with the top 1% of the population owning 42.7%, the next 19% of Americans owning 50.3%, and the bottom 80% owning 7%. However, according to the federal reserve, "For most households, pensions and Social Security are the most important sources of income during retirement, and the promised benefit stream constitutes a sizable fraction of household wealth" and "including pensions and Social Security in net worth makes the distribution more even". When including household wealth from pensions and social security, the richest 1% of the American population in 1992 owned 16% of the country's total wealth, as opposed to 32% when excluding pensions and social security.
which started in 2007, the share of total wealth owned by the top 1% of the population grew from 34.6% to 37.1%, and that owned by the top 20% of Americans grew from 85% to 87.7%. The Great Recession also caused a drop of 36.1% in median household wealth but a drop of only 11.1% for the top 1%.
Note: The IRS specifically warned that changes in their definition of Adjusted Gross Income make it impossible to compare pre-1987 AGI with post-1987 AGI, so keep in mind that comparisons should be in gross income or salary and not in AGI. When reading statistics, it behooves the reader to have this awareness.[]
According to the , between 1979 and 2007 incomes of the top 1% of Americans grew by an average of 275%. During the same time period, the 60% of Americans in the middle of the income scale saw their income rise by 40%. From
the top 400 income earners in the U.S. saw their income increase 392% and their average tax rate reduced by 37%. In 2009, the average income of the top 1% was $960,000 with a minimum income of $343,927.
During the economic expansion between 2002 and 2007, the income of the top 1% grew 10 times faster than the income of the bottom 90%. In this period 66% of total income gains went to the 1%, who in 2007 had a larger share of total income than at any time since 1928. According to
and others, the top 400 wealthiest Americans "have more wealth than half of all Americans combined."
may help explain why many Americans who have become rich may have had a "substantial head start". In September 2012, according to the , "over 60 percent" of the
"grew up in substantial privilege".
If a family has a positive net worth then it has more wealth than the combined net worth of over 30.6 million American families. This is because the bottom 25% of American families have a negative combined net worth.
This section does not
any . Please help
by . Unsourced material may be challenged and . (January 2018) ()
Interpreting these income statistics is complicated by several factors: membership in the top 1% changes from year to year, the IRS made large changes in the definition of adjusted gross income in 1987, and numbers for particular income ranges may be distorted by outliers (in the top segment) and failure to include transfer payments (in the lower segments).
Income Mobility: The IRS occasionally studies income data from actual households over time, usually over one decade. They actually underestimate income mobility by excluding the most mobile population from their studies: those under age 25.
Most people[] only look at annual reported income data split into income quintiles. It is erroneous to assume that individual households remain in the same quintile over time, just as it usually is when using aggregate data. A majority of households in the top income quintile in one year, for example, will have moved to a lower quintile within a decade. Three out of four households in the top 0.01% of income will no longer be in that small group ten years later. In summary, half of all of U.S. households move from one income quintile to a different income quintile every decade. And actual households who started a decade in the lowest quintile of income, when tracked over the next ten years, will have proportionally more income growth than actual households who started the decade in the highest quintile of income. Thus, when comparing income/wealth quintile distributions from different time periods, generalizations can only be made with regards to the households in aggregate for each quintile, and can not be made to any individual households over the same time period (i.e. assuming the wealth value has been appropriately adjusted for differences in time, one cannot infer that a decrease in total wealth percentage for one quintile over time means that the households from that quintile have lost wealth as individuals, but only that total wealth percentage has decreased for those in that quintile at the time of measurement).
Top 20% income vs. Bottom 20% income households: (1) The average number of people with jobs in a top income quintile household is two, while a majority of bottom income quintile households have no one employed. (2) If there are two adult income earners in a household who are married, their incomes are combined on tax forms. This is very common among top quintile income households. The lowest quintile households, however, include a lot more single-person households, or two unmarried working adults living together, and sharing expenses, but reporting their incomes to the IRS as if they were two separate households. (3) 75% to 80% of the actual income for bottom quintile households is transfer payments (aka "welfare") that are not included in IRS income data. The top income quintile gets a very small percentage of their actual income from transfer payments.
(4) The IRS warns against comparisons of pre-1987 and post-1987 income data due to significant changes in the definition of adjusted gross income (AGI) that made top quintile households appear to have large reported income gains, when in fact there was no change to their income at all. In addition to the AGI changes, large marginal tax rate reductions during the Reagan Administration caused another large change in tax reporting. A lot of corporate income formerly reported on corporate tax returns was switched to lower tax rate individual tax returns (as Subchapter S corporations). This reporting change appeared to boost top quintile income, when in fact their incomes had not changed. As a result, the top income quintile for households today includes a lot of corporate income previously reported in corporate tax returns, while Subchapter S corporations who lose money are likely to be included in the bottom income quintile households. Income comparisons that compare pre-1987 to post-1987 income are very common, but they are also biased, according to the IRS, and should be ignored.
Impact of age and experience: people that are older and have more experience tend to have considerably larger incomes that younger and inexperienced workers. But all older and experience people were young and inexperienced at one point. So comparing incomes between groups without normalizing for age and experience is somewhat meaningless.
Home ownership is one of the main sources of wealth among families in the United States.
Family net worth
U.S. mean family net worth by percentile of net worth ()
U.S. median family net worth by percentile of net worth ()
The total value of all U.S. household wealth in 2000 was approximately $44 trillion. Prior to the
which began in December 2007 its value was at $65.9 trillion. After, it plunged to $48.5 trillion during the first quarter of 2009. The total household net worth rose 1.3% by the fourth quarter of 2009 to $54.2 trillion, indicating the American economy is recovering.
Family net worth, by selected characteristics of families,
Thousands of 2013 dollars. Excluding net worth from pensions and social security.
Family characteristic
All families
Percentile of income
Less than 20
Age of head (years)
Less than 35
75 or more
Family structure
Single with child(ren)
Single, no child, age less than 55
Single, no child, age 55 or more
Couple with child(ren)
Couple, no child
Education of head
No high school diploma
High school diploma
Some college
College degree
Race or ethnicity of respondent
White non-Hispanic
Nonwhite or Hispanic
Current work status of head
Working for someone else
Self-employed
Other not working
Current occupation of head
Managerial or professional
Technical, sales, or services
Other occupation
Retired or other not working
Housing status
Renter or other
Percentile of net worth
Less than 25
+ Less than 0.05 ($50).
Wikimedia Commons has media related to .
. U.S. Federal Reserve. . Archived from
on March 13, 2010.
"Growing Wealth, Inequality, and Housing in the United States." Zhu Xiao Di. Feb. 2007. Joint Center for Housing Studies.
"Wealth Inequality: Data and Models." Marco Cagetti and Mariacristina De Nardi. Aug. 2005. Federal Reserve Bank of Chicago.
Broder, David (4 February 2010). . Melbourne, Florida: Florida Today. pp.&#160;11A.
Haskins, Ron: "Wealth and Economic Mobility". Economic Mobility Project, 2007.
Sponsored by (). . .
. Ihdp.unu.edu. .
by Edward N. Wolff, Levy Economics Institute of Bard College, March 2010
by G. William Domhoff of the UC-Santa Cruz Sociology Department
by Arthur B. Kennickell and Annika E. Sundén of Board of Governors of the Federal Reserve System
Dave Gilson and Carolyn Perot, , Mother Jones, March/April 2011 Issue
, CNN, October 29, 2011
. Accessed October 2011.
Robert Pear, , New York Times, October 25, 2011
Kertscher, T Borowski, Greg (March 10, 2011). .
(March 6, 2011). .
(March 7, 2011). . michaelmoore.com. Archived from
Pepitone, Julianne (September 22, 2010). .
Bruenig, Matt (March 24, 2014). .
Staff (March 18, 2014). .
Pizzigati, Sam (September 24, 2012). .
, Summary R Public Date, Estimates inflation-adjusted to 2013 dollars, Table 4; Population number in: Changes in U.S. Family Finances(pdf); Also see table below in Statistics
Addition reading on income mobility:
, Summary Results, Public Date, Estimates inflation-adjusted to 2013 dollars, Table 4
( – January, 2014).
: Hidden categories:}