Download Lorentz curve, extracting data

計算機語言 (大一, 第二学期)
福島康裕 助理教授, 環境系統工程研究室
email: [email protected], ext. 65838
Last Week’s Exercise


Why sort by GDP per capita?
Why calculate GDP? What is cumulative income?
Lorenz curve
for global economy


Objective:
To show how uneven our global economy is.
Ideal data?


Ask each 6.5 billion people how much income
they have every year
 impossible
Realistic data

Look at GDP of the country, and assume that
everyone in a country has the same income.
Each person’s income
= GDP of his or her country / Population of his or her country
= GDP per capita
Procedures
1.
2.
Sort by GDP per capita
Calculate GDP and its accumulation


We don’t want to have every 6.5 billion data on our
excel sheet
We assumed everyone in a country has same income.
Thanks to this assumption, we can add each person’s
income (= GDP per capita) for each country by
calculating GDP
 income of a person in a country  GDP
for all population
in the country
3.
4.
5.
6.
Obtain accumulation of population
Normalize 2 and 3
Plot in a scattergram
Calculate Gini’s coefficient
Gini’s coefficient

How can we calculate Gini’s
coefficient?
B
O
A
Hints:
- △OAB=0.5
- There are two parts
inside △OAB. If we
know one, we can
calculate the other
Which
part? How?
Extracting data

Get the data that matches to our
interest
Using “Auto Filter”
 Using “Custom Auto Filter”

EXAMPLE) Which are the countries that are
1% < r < 2% (population growth rate)
in America or Europe ?
Custom Auto Filter
Auto Filter
(GDP per capita  top ten)
If you choose Europe, you can get EU countries that
are in Top 10 in GDP per capita.
More complex query using
Auto Filter

Benn’s Diagram : AND and OR
A
C
B
●AND● = C
● OR ● = A+B+C
10,000 < GDP per capita < 20,000
10,000 < GDP per capita
AND?
OR?
GDP per capita < 20,000
Custom Auto Filter
Custom Auto Filter Dialog
≦ : is greater than or equals to
= : equals
< : is greater than ≧ : is less than or equals to
> : is less than
<> : does not equal
EXAMPLE) Which are the countries that are
1% < r < 2% (population growth rate)
in America or Europe ?
EXAMPLE) Which are the countries that are
1% < r < 2% (population growth rate)
in America or Europe ?
EXAMPLE) Which are the countries that are
1% < r < 2% (population growth rate)
in America or Europe ?