Comparison Of Income Inequality Across Nations Economics Essay

Harmonizing to the 2006 information from United Nations, 2.7 billion people lived less than two dollars per twenty-four hours worldwide. In the same research “ More than 800 million people go to bed hungry everyday and 300 of which are kids ” ( United Nations, 2006 ) . As we can see in these figures, poorness is prevailing around the universe. The universe bank defines poorness as “ want of wellbeing. ” We measure poverty by uniting an person ‘s ( or family ‘s ) resources and compare it to some minimal threshold plenty to populate in a peculiar country. This is the construct of making a poorness line wherein people belonging below that certain degree is accounted for the hapless ‘s per centum. On the other manus, the statistics we found on poorness does non merely bound with figures, there ever a theory behind the Numberss we get. Harmonizing to the World Bank, poorness does non restrict to pecuniary step such as single income, poorness can be from any signifiers of want it may be wellness, instruction, freedom and deficiency of chances which so leads to the things we clearly see like their resources owned and their conditions of life. Harmonizing to Amartya Sen, a Nobel Prize victor for Economics, “ Human existences are thoroughly diverse, You can non ever pull a poorness line and so use it across the board to everyone in the same manner without taking into history personal features and fortunes. ” Poverty is multidimensional, we besides take into history non merely by the income each persons receives but how these resources benefit them.

B. Aims of the Research

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The World bank provided a enchiridion refering poorness, its background and the intent of analyzing it. Harmonizing to the universe bank enchiridion by Hanghton and Khandker, one of the intent of mensurating poorness is to be able to measure the effectivity of establishments such as Government. We can non measure the public presentation of these establishments without carry oning surveies about poorness because we will non cognize to what extent our society had improved. Measuring poorness besides helps detect and find policy and undertaking effectivity. Knowing the province of poorness enables the authorities to analyse who benefits their undertakings, to what extent would it impact on hapless families and whether or non to go on implementing those policies. To extinguish income inequality, a proper background cheque is needed ; such as cognizing their demands and the factors that affect the spread. Our chief aim is to assist the hapless header up with the environment therefore we should garner information on them to hold an effectual policy. Measuring poorness is non the terminal of the narrative, understanding its causes every bit good as bring forthing schemes how to battle these jobs and explicate a good policy to implement it is necessary. It is of import to understand poorness as a dynamic entity since it concerns about worlds. One of the large issues refering poorness is income inequality. Income inequality can be measured through Gini index named after an Itallian statistician Corrado Gini. Gini index measures income inequality based from Lorenz Curve. It measures the resources owned or market portion by a certain per centum of the population. It is values from zero to one, nothing for perfect equality and one for perfect inequality. In the existent universe Gini coefficients are between 0 and 1. This paper looks into the factors that affect the income inequality between 78 states.

C. Scope and Restrictions

This is a cross subdivision survey of different ratios of income inequality among states in the twelvemonth 2007 through Gini index. Gini index is used because it measures each person ‘s public assistance by demoing comparative market portions but Gini index does non mensurate the existent end product of the state. Gini coefficients focal points on societal equity and it guides allotment of each state ‘s resource to their people be it in wellness, assistance effectivity, corruptness, offense and other societal factors. But despite all these harmonizing to Jason Soderblom in his paper about Gini coefficients, Gini index is rather sensitive to overestimate or underestimate. The information on states were based on the information available in the statistical surveies of the four independent variables from different beginnings viz. , inward foreign direct investing, corruptness index, population growing rate and instruction index, all from twelvemonth 2007 information.

II Review of Related Literature and Theoretical Framework

Overpopulation is one of the biggest jobs with some states like in the Philippines. Harmonizing to the World Bank, the Philippine population about quadrupled from 1948-2000, from 19.2 million to 76.5 million with growing rate of 3 % in the sixtiess and 2.3 in the 1990 ‘s. This values are high compared to other ASEAN states. Poverty decrease is slow because it is offset by rapid population growing. Because of high incidence of poorness, income inequality has increased. In the same survey, it besides founded that the portion of the poorest 20 % in national income had decreased from 4.8 % in 1985 to 4.7 % in 2000 while the portion of the richest 20 % increased from 51.2 % in 1985 to 54.8 in 2000. The Gini coefficient besides increased from 0.41 in 1985 to 0.46 in 2002. Population addition and low end product growing has a positive parts to income inequality because as people additions, portion of each individual decreases.

In a research paper made by Sanjeev Gupta, Hamid Davoodi and Rosa-Terme on May 1998 utilizing a 1980-1997 information. Cross state arrested development analysis showed that addition in corruptness additions income inequality and poorness every bit good. Harmonizing to the survey, an addition in corruptness index by one criterion divergence would cut down income growing of the hapless by 7.8 per centum point therefore it widens income inequality. This paper concludes that corruptness increases the spread between the rich and the hapless. This determination is associated with colored revenue enhancement systems which favors the rich, hapless targeting of societal plans, graft by the rich in return for policies that favors them and unequal entree to instruction.

In the research paper made by Changkyu Choi entitled “ Does foreign direct investing affect domestic income equality? “ , by utilizing a pooled OLS, he found out that addition in foreign direct investing as a per centum of GDP additions with income inequality. Foreign Direct Investment is calculated as the amount of inward and outward FDIs. The trial is important at 1 % alpha degree and a coefficient of 0.116. Changkyu Choi ‘s paper introduced old researches made to turn out that FDI increases with income inequality. A research utilizing 1975 to 1988 informations by Feenstra and Hanson ( 1997 ) showed that the lifting pay inequality of Mexico is associated with the addition of FDI influxs. In Korea, a research conducted by Mah ( 2002 ) utilizing FDI influxs and trade values on Gini coefficient showed that increasing of income inequality was triggered by globalisation. In UK, Taylor and Driffield ( 2004 ) besides found out that FDI is responsible for the rise pay inequality utilizing 1983 to 1992 informations. Zhang and Zhang ( 2003 ) besides found out that foreign trade and FDI are lending to the widening regional income inequality of China. FDI increases income inequality because its primary demand are the skilled workers which has a limited supply hence the monetary value of obtaining their labour ( the worker ‘s pay ) is high. Comparing rewards of the skilled and unskilled worker, the spread increases as FDI addition.

Education Index is computed through uniting big literacy rate, which is two tierces of the calculation and one tierce of which is the gross registration ratio of primary, secondary and third degrees of instruction. In the presidential reference made by Gregory Mankiw at the Eastern Economic Association, he emphasized the importance of function of instruction in prolonging equality between the rich and hapless. He cited the book written by Goldin and Katz in their book entitled Race Between Education and Technology. They concluded that the ground behind inequality is the lag of instruction With lag of instruction, there would be less skilled workers, with high demands for skilled workers, the pay of the skilled worker will be comparative higher than the unskilled therefore widens the income spread between them. But Mankiw besides stated that instruction has still no obvious impact on the super rich. “ Simply traveling to college and graduate school is barely adequate to fall in the top echelons doing 1000000s a twelvemonth. “ ( Mankiw, 2010 )

III Data

One good step of poorness is the Gini index. It is besides called as an “ index of income concentration ” In a short paper Gini Coefficients: Their Role And Operation ” by Jason Soderblom in January 2005, The Gini index is a powerful tool to mensurate equality and inequality in a state and is a utile usher for prognosis on different conditions of life where it can non be explained by GNP capita because it merely shows the norm of a certain state ‘s resources, non the existent distribution.

Harmonizing to, “ Foreign Trade Investments ( FDI ) is any signifier of investing that earns involvement in endeavors which function on the exterior of the domestic district of the investor. There are two types of FDI ; the outward and the inward. Outward FDI is backed by the authorities and is exposed to revenue enhancement inducements or sometimes revenue enhancement deterrences. Inward FDIs are the capital bought domestically by a foreign house who decides to set up an endeavor inside the host state ( domestic state ) .

Education Index is a digest of Literacy rate which is 2/3 of the weight and Gross registration ratio of primary, secondary and third degrees. Literacy rate is the ability of a individual to read and compose.

Population growing rate is the per centum of addition of population following twelvemonth from the current twelvemonth. In my informations, I used overall population growing rate: which measures all factors lending to population increase such as births and migration. population growing rate is expressed in per centum in my informations.

Corruption Perceptions Index ( CPI ) is conducted by Transparency International to mensurate the standing of the degree of corruptness by states. CPI measures the ranking, CPI mark and assurance interval. In my informations, I obtained the CPI tonss of each of my observations. Harmonizing to Transparency International, CPI tonss are views/perceptions coming from concern sectors and analysts for the twelvemonth 2007. In their informations, a CPI mark of 10 agencies extremely clean while a CPI mark of 0 agencies extremely corrupt. In my informations, I converted 0 as the cleanest and 10 as the most corrupt. Using the same information, I merely subtracted each information by 10 and acquire the absolute value. I used this so that it would be consistent with the flow of values as with my Gini coefficient ( Lower figure means less, higher figure means more ) .

IV Methodology

A. Summary of Variables

We want to cognize the factors that affect income inequality for the twelvemonth 2007. Datas are obtained from World Bank, UNCTAD, UNDP, HDR stats, and There are 78 observations all in all. Below is the sum-up of the mean, standard divergence, lower limit and maximal values of the each of the variables.


Ob river


Std. Dev.












Std. Dev



























Summary of Variables

My informations have 78 observations which is sufficient for my cross subdivision arrested development because it exceeds 30 observations, which is required in the cardinal bound theorem. Standard divergence shows how dispersed the value of the variable of the observations. Minimum and Maximum refers to the values of the informations of each variable that is lowest and highest severally. For the Gini index, mean Gini is 39.67, intending there is 39.67 % inequality between rich and the hapless on norm, the standard divergence is 10.56 % , which means that the informations are rather dispersed. Minimum value is 24.7 while maximal value is 74.3. Population growing is expressed through per centum, average growing rate is.88 % , standard divergence is.99 % which shows that population growing rate is non really spread except that there are utmost values like the maximal value obtained in the information, min and soap values are -.88 % and 3.57 % severally. The scope is -0.11 up to 1.87. Corruption index is measured through evaluation from 0-10. The average value is 5.32, standard divergence is 2.32 which is besides considered dispersed with a scope from 3 to 7.64, lower limit ( least corrupt ) and maximal values ( most corrupt ) are.6 and 8 severally. Inward FDI inflows has a average value of $ 147,462.5 million. Standard divergence is $ 326,879.7 million, lowest inward FDI inflows received $ 126 million while the highest inward FDI inflows received $ 2,093,049 million. There is a broad scattering of FDI influxs among states. Last variable is the instruction index, which is measured through per centums. Mean instruction index of my 78 observations is 84.6 % , which I consider a high mark. Standard divergence is 15.5 while lower limit and upper limit values are 28.2 % and 99.3 % severally. Datas are dispersed at the scope from 69.1 % to 100.1 % .

B. Estimation Procedures

Here is the estimated theoretical account based from A-priori outlooks:

logginiindex= I?1 + I?2X1 ( populationgrowthrate ) + I?3X2 ( corruptionindex ) + I?4X3 ( inwardfdiinmillionsofus ) – I?5X4 ( educationindex )

This clip, I am traveling to look how the independent variables affect the Gini Index. When Gini index additions, equality worsens and frailty versa. The first variable is the population growing rate, as it increases Gini index besides increases because as population additions, more people compete for the resources and some do non hold adequate chance to profit from these resources ( like chance to larn proficient accomplishments ) . Harmonizing to the World Bank, in the Philippine scene, human capital is high but the quality starts to deteriorate as population additions because resource such as preparation, instruction, wellness and other benefits are limited.

Following variable is corruption index. The theoretical account shows a positive relation with the Gini coefficient. Corruptness lessens the resources that should be allocated to the people such as societal security and wellness benefits. Harmonizing to the paper by Sanjeev Gupta, Hamid Davoodi and Rosa Terme, Corruption distorts the authorities ‘s allotment of resourcse therefore the distribution of wealth will be biased this explains the widening spread between rich and hapless.

As Inward foreign direct investing additions, the Gini coefficient additions. FDI has a negative part if the FDI does non heighten the unskilled. This inward investing requires skilled worker which is low in supply therefore rewards for such type of work is high. Because of inequality of rewards, income inequality additions. Harmonizing to the paper Does foreign direct investing affect domestic income inequality? , the writer stated that both inward and outward FDI has a damaging consequence on income inequality because it is associated to occupation losingss and pay inequality.

For the last variable, instruction index is expected to be negatively related with Gini index because the more the educated the more people who become skilled therefore there would be no immense spread batween rewards. Harmonizing to Gregory Mankiw, Poor quality of instruction is the ground behind the widening income inequality.

After holding an A-priori outlook, Stata package is to be used to regress the theoretical account and with that we will be able to happen the coefficients of each variable and how it affects the dependant variable.

For now, we are traveling to presume that my OLS theoretical account is efficient, sufficient, indifferent and consistent. In my cross subdivision arrested development it is assumed to be independent and indentically distributed significance there are no misdemeanors of multicollinearity and heteroscedasticity as required by Classical Linear Regression Model. After regressing the information, the theoretical account would be tested for these misdemeanors. The truth of the information is achieved by minimising the Residual Sum of Squares.

In the Stata package, we will besides able to find the significance of the trial through p-values, t-values and f-statistics. The significance is known by looking its assurance degree. In a 95 % assurance degree, p-value ( which I will be establishing significance ) should non transcend the alpha degree of 0.05 for it to be important. R-squared is besides seen in the package. It shows hoe related is the dependent variable to the independent variable.

V. OLS Regression and Analysis

In my arrested development theoretical account, R-squared is 22.83, it shows low correlativity between dependant and independent variables due to the type of theoretical account used. Since I used log-lin theoretical account, the value of the dependant variable is excessively large to explicate the independent variable which is additive in signifier.

Gini Index theoretical account:

logginiindex= 3.343742 + .0872636 ( populationgrowthrate ) + .0314059 ( corruptionindex ) + 3.80e-08 ( inwardfdiinmillionsofus ) + .0006419 ( educationindex )

If all the independent varibles ( population growing rate, corruptness index, inward fdi influxs and instruction index ) were changeless, Gini index is 3.34 % , P-value is 0.000, less than 0.05 alpha degree therefore the intercept is important. Without the intercession of the four independent variables, Gini index is favourable because there is more equality than inequality of income in the society. The independent variables of this theoretical account worsens the Gini index.

For population growing rate, a per centum point addition in population growing rate would increase the Gini index by 9.1184 % , ceteris paribus. P-value is 0.022, less than 0.05 alpha degree therefore the trial for populationgrowthrate is important. Based from my A-priori outlook, population growing rate worsens ( therefore addition ) Gini index because poorness decrease is offset by population growing.

For corruptness index, a point addition in corruptness rate would increase Gini index by 3.1904 % ceteris paribus. P-value is.039, lower than 0.05 alpha degree for 95 % assurance degree, hence the trial for corruptness index is important. The trial supported the A-priori outlook that corruptness increases income inequality due to colored revenue enhancement systems, unequal entree to instruction, graft, etc.

For Inward Foreign Direct Investment, a 1 million dollars addition of FDI would increase Gini index by 3.8 % ceteris paribus. P-value is 0.681, greater than 0.05 alpha degree at 95 % assurance degree, hence the trial for FDI is non important. It can be explained that the information I gathered is inward FDI which is merely a portion of the entire FDI and the other variables explains much more to the Gini index than inward FDI.

For Education Index, a per centum point addition in instruction index will increase Gini index by 0.06421 % ceteris paribus. P-value is 0.812, higher than the 0.05 alpha degree at 95 % assurance degree, hence the trial for instruction index is non important. Education is supposed to impact Gini index negatively because the higher the instruction index, the more the people who are skilled hence higher supply of skilled workers which lessen the spread between the rich and hapless. But in my trial, the coefficient of instruction is positive possibly because of the quality of instruction. If the quality is hapless, people will non go skilled and hence there would be inequality of rewards, which finally leads to income inequality.

VI Test For Multicollinearity and Heteroscedasticity

It is of import to prove for any misdemeanors before utilizing the theoretical account to explicate policies. Since we assumed before that the OLS has no misdemeanors, it now clip to prove the theoretical accounts and if there are any, apply the necessary traetment for it. There are three trial to be conducted in my arrested development ; A trial for multicollinearity between independent variables, a heteroscedasticity trial for random variables and autocorrelation.

A. Multicollinearity

In the existent universe where everything is interconnected, it is natural that there is a small multicollinearity between variables. But in the OLS appraisal, multicollinearity is merely allowed in a tolerable degree. Now we are traveling to look into whether the theoretical account has perfect multicollinearity through discrepancy rising prices factor.

To look into whether the theoretical account is enduring from terrible multicollinearity, we need to look into the values of the VIF. In my theoretical account, average vif is 1.91 and the VIFs of the independent variables did non make a vif of more than 10, hence there is no terrible multicollinearity in the theoretical account. There is no demand to bring around for multicollineraity.

B. Heteroscedasticity

Heteroscedasticity is normally present when discrepancies of random variables differs from each other. To prove for hetroscedasticity in my theoretical account, I will utilize White ‘s trial to my informations.

In this trial, void hypothesis provinces that the theoretical account is non enduring from heteroscedasticity alternate hypothesis provinces that the theoretical account is guilty of heteroscedasticity. P-value is 0.2145, greater than the 0.05 alpha degree hence do non reject the void hypothesis that states that my theoretical account does non endure from heteroscedasticity. With this consequence there is no demand to for heteroscedasticity.

Since we already tested for Multicollinearity and Homoscedasticity and the trial proved the the theoretical account is non guilty of these misdemeanors, it is clip to construe the consequences of the arrested development.

VII Proof of Strict Exogeneity and RAMSEY trial

A. Proof of Strict Exogeneity

It is of import to prove for exogeneity of stochastic variables in order to turn out that the independent variables are non correlated with omitted variables represented by the stochastic variable.

The trial showed that there is no correlativity between residuary and the independent variables and there is 1.0000 correlativity by itself hence the arrested development theoretical account is BLUE.


This trial is used to observe whether the theoretical account has instance 1 mistake, the mistake of skip or instance 3 mistake, the mistake in which a incorrect theoretical account is used.

Null hypothesis provinces that the theoretical account has no omitted variables, since P-value is greater than 0.05 we do non reject the nothing. Therefore the theoretical account has no omitted variable and the theoretical account used is right.

VIII Conclusion and Recommendation

Without the exogenic variables, there is less income inequality in the society. Knowing the factors that affect the income equality is utile in poorness decrease policies. Poverty is present wholly around the universe and it is our nonsubjective to minimise it if can non be eliminated. Based from the arrested development analysis, population growing rate and corruptness contributed much to the widening spread between the rich and hapless. A treatment bill of exchange from the World Bank stated that slower population growing leads to an addition of income equality hence a lessening in income inequality. This is due to higher demand of labour and lower supply of labour. Since the demand is high, rewards additions and we know that the beginning of income influx of the hapless is labour. With higher existent rewards, the hapless can get by up with the remainder and there is minimisation of income spreads. In the paper made by Sanjeev Gupta, Hamid Davoodi and Rosa Alonzo-Terme entitled Does Corruption affects Income Inequality and Poverty? , They explained that corruptness can impact income inequality in many ways. It can be through biased revenue enhancement system, improper societal disbursement, hapless growing and graft. Biased revenue enhancement system because with a corrupt environment, there would be revenue enhancement equivocation and freedoms that favors the rich and good connected. Social disbursement should be targeted to the hapless because they are the 1 who need help the most. With hapless societal plans, the hapless benefit less therefore higher inequality. Harmonizing to ( Ravallion and Chen, 1997 ) , high economic growing means higher rate of poorness decrease, so hapless growing means lower poorness decrease therefore the inequality. For the FDI, In the paper Does Foreign Direct Investment affect Domestic Income Inequality? , Changkyu Choi cited that a survey conducted by ( Deardoff and Stern, 1994 ) concluded that FDI can cut down income inequality by using the low-income unskilled worker.

Poverty decrease is a duty non merely of the authorities but to the person every bit good. Lowering population growing rate can be achieved through subject, being responsible and self control. On the authorities ‘s side, population control can be helped by increasing barriers to deter population addition. Aside from overpopulation due to increases population growing rate, another large subscriber to income inequality is corruptness. Implementing policies that fight corruptness by implementing policies that promote transparence and equity and by altering our selfish outlook is one large manner to assist better the lives of many.

Nine Beginnings:

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United Nations Conference on Trade and Development, Inward FDI stock, by Host Region and Economy, 1980-2007, Retrieved Aug. 15, 2010, from

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United Nations Developing Programme, Human Development Index 2007 and its constituents, Education Index, Retrieved Aug. 15, 2010, from hypertext transfer protocol: //hdrstat

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