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Any poverty line will be somewhat arbitrary, and it is useful to have a poverty line whose basic definition does not change much over time. If Congress voted every few years to redefine what poverty means, then it would be difficult to compare rates over time. After all, would a lower poverty rate mean that the definition had been changed, or that people were actually better off? Government statisticians at the U.S. Census Bureau have ongoing research programs to address questions like these.

Key concepts and summary

Wages are influenced by supply and demand in labor markets, which can lead to very low incomes for some people and very high incomes for others. Poverty and income inequality are not the same thing. Poverty applies to the condition of people who cannot afford the necessities of life. Income inequality refers to the disparity between those with higher and lower incomes. The poverty rate is what percentage of the population lives below the poverty line, which is determined by the amount of income that it takes to purchase the necessities of life. Choosing a poverty line will always be somewhat controversial.

Problems

In country A, the population is 300 million and 50 million people are living below the poverty line. What is the poverty rate?

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In country B, the population is 900 million and 100 million people are living below the poverty line. What is the poverty rate?

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References

Ebeling, Ashlea. 2014. “IRS Announces 2015 Estate And Gift Tax Limits.” Forbes. Accessed March 16, 2015. http://www.forbes.com/sites/ashleaebeling/2014/10/30/irs-announces-2015-estate-and-gift-tax-limits/.

Federal Register: The Daily Journal of the United States Government. “State Median Income Estimates for a Four-Person Household: Notice of the Federal Fiscal Year (FFY) 2013 State Median Income Estimates for Use Under the Low Income Home Energy Assistance Program (LIHEAP).” Last modified March 15, 2012. https://www.federalregister.gov/articles/2012/03/15/2012-6220/state-median-income-estimates-for-a-four-person-household-notice-of-the-federal-fiscal-year-ffy-2013#t-1.

Luhby, Tami. 2014. “Income is on the rise . . . finally!” Accessed April 10, 2015. http://money.cnn.com/2014/08/20/news/economy/median-income/.

Meyer, Ali. 2015. “56,023,000: Record Number of Women Not in Labor Force.” CNSNews.com. Accessed March 16, 2015. http://cnsnews.com/news/article/ali-meyer/56023000-record-number-women-not-labor-force.

Orshansky, Mollie. “Children of the Poor.” Social Security Bulletin . 26 no. 7 (1963): 3–13. http://www.ssa.gov/policy/docs/ssb/v26n7/v26n7p3.pdf.

The World Bank. “Data: Poverty Headcount Ratio at $1.25 a Day (PPP) (% of Population).” http://data.worldbank.org/indicator/SI.POV.DDAY.

U.S. Department of Commerce: United States Census Bureau. “American FactFinder.” http://factfinder2.census.gov/faces/nav/jsf/pages/index.xhtml.

U.S. Department of Commerce: United States Census Bureau. “Current Population Survey (CPS): CPS Table Creator.” http://www.census.gov/cps/data/cpstablecreator.html.

U.S. Department of Commerce: United States Census Bureau. “Income: Table F-6. Regions—Families (All Races) by Median and Mean Income.” http://www.census.gov/hhes/www/income/data/historical/families/.

U.S. Department of Commerce: United States Census Bureau. “Poverty: Poverty Thresholds.” Last modified 2012. http://www.census.gov/hhes/www/poverty/data/threshld/.

U.S. Department of Health&Human Services. 2015. “2015 Poverty Guidelines.” Accessed April 10, 2015. http://www.medicaid.gov/medicaid-chip-program-information/by-topics/eligibility/downloads/2015-federal-poverty-level-charts.pdf.

U.S. Department of Health&Human Services. 2015. “Information on Poverty and Income Statistics: A Summary of 2014 Current Population Survey Data.” Accessed April 13, 2015. http://aspe.hhs.gov/hsp/14/povertyandincomeest/ib_poverty2014.pdf.

Questions & Answers

Do somebody tell me a best nano engineering book for beginners?
s. Reply
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Devang Reply
are you nano engineer ?
s.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
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SUYASH
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s. Reply
of graphene you mean?
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Ebrahim
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s.
Graphene has a hexagonal structure
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Cied
types of nano material
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I start with an easy one. carbon nanotubes woven into a long filament like a string
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Porter
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what is system testing?
AMJAD
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
AMJAD
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AMJAD
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Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
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anybody can imagine what will be happen after 100 years from now in nano tech world
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after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
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I'm interested in Nanotube
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this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
Prasenjit
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Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
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Source:  OpenStax, Principles of microeconomics for ap® courses. OpenStax CNX. Aug 24, 2015 Download for free at http://legacy.cnx.org/content/col11858/1.4
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