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1

W POSZUKIWANIU “OGÓLNEJ TEORII WSZYSTKIEGO”: CZY NIERÓWNOŚCI DOCHODOWE RZECZYWIŚCIE NAM SZKODZĄ?

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Stasiowski J.

Polityka Społeczna

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2011

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vol. 38

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issue 8(449)

13-17

EN

Following article presents basic points contained in the book "The Spirit Level" byRichard Wilkinson and Kate Pickett. Author reconstructs the author’s theory about the social consequences of income inequality and shows its main disadvantages. Empirical part of the article presents the results of the analysis conducted on the sample of 64 Polish municipalities. For each of them the main indicators of the level of income inequality, population’s health, the level of social capital and sense of security were computed. The results of the analysis indicated no statistically significant correlation between the level of income inequality and analyzed indicators

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Economic growth and the optimal inequality of income

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Sztaudynger J. J.

Annales. Etyka w Życiu Gospodarczym

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2018

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vol. 21

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issue 8

89-99

EN

Inequality of income is one of the significant factors forming social capital. Two views dominate among economists dealing with the influence of income inequality on economic growth. On the one hand, a too low level of income inequality does not motivate people to increase their labour productivity. Low inequality of income might result from an extended social care system and a GDP burdened with social transfers. A good example may be a situation when an unemployed person refuses to accept a job offer and prefers unemployment benefits to a slightly higher salary. Moreover, a lack of incentives for an employee who fails to acknowledge the economic sense of increasing the productivity of his or her work might lead to a slower growth of the economy. On the other hand, a contrary view suggests that an increase in inequality of income has a negative impact on the economy. The accumulation of wealth by a small number of citizens raises doubts about the good use of that wealth for the investments necessary for the growth of the economy. Excessive inequality of income is confronted with the disapproval of a significant part of society and is regarded as unfair and unjustified. It may also increase the crime rate, decrease trust and, more generally, lead to the weakening of social capital. The arguments presented above lead to the hypothesis that the influence of income inequality on the growth of the economy has a non-linear, parabolic character. We have confirmed this hypothesis in growth models of the US and Swedish economies. We assess the historically optimal inequality of income measured by the Gini coefficient at 46% and 24% for the US and Sweden, respectively. The optimal inequality of income for Poland was assessed previously at 29%. The dissimilarities may result from differences in culture, society, educational level and diligence.

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Gender differences in income distributions in Poland

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Włodarczyk J.

Nierówności społeczne a wzrost gospodarczy

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2020

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issue 63

210-232

XX

The paper presents results of a descriptive analysis of income distributions as well as top income inequality among women and men in Poland. The analysis is based on the dataset provided by the Council for Social Monitoring (2019). Throughout 2003–2015 their panel survey included, for example, a question on individual net monthly income in the past three months. In order to reduce differences associated with the age of entering and exiting the labour market on declared income levels (especially pensions), the calculations include only women and men aged 25–60 years. The analysis of income distributions of women and men in Poland is based on standard measures such as mean income, median income and related measures, as well as the Gini coefficient, Theil index and entropy index. It is supplemented by kernel density estimates and results of simultaneous quantile regressions that demonstrate differences between women and men across income groups. The analysis of top income inequality includes comparisons of subsamples consisting of top 3% earners in each group. The share of women in the top percentiles is then calculated and discussed. The analysis shows different dynamics related to the incomes of women and men, which provides support for including business cycle considerations in the analysis of income inequalities and their gender aspects.

PL

W artykule przedstawiono wyniki analizy opisowej rozkładów dochodów kobiet i mężczyzn w Polsce ze szczególnym uwzględnieniem nierówności w grupie osób o najwyższych dochodach. Analizę oparto o bazę danych opracowaną przez Radę Monitoringu Społecznego (w ramach projektu Diagnoza Społeczna). W latach 2003–2015 jedno z pytań zadawanych respondentom dotyczyło indywidualnego miesięcznego dochodu netto z ostatnich trzech miesięcy. W celu zmniejszenia wpływu różnic związanych z momentem wchodzenia na rynek pracy i przechodzenia na emeryturę analizę ograniczono do osób w wieku 25–60 lat. W analizie rozkładów dochodów kobiet i mężczyzn w Polsce wykorzystano m.in. standardowe miary, takie jak średni dochód lub mediana dochodu oraz wskaźniki oparte na tych miarach, jak również współczynniki Giniego, Theila oraz entropii. Poza tym wykorzystano jądrowe estymatory gęstości i przedstawiono wyniki estymacji regresji kwantylowej pokazującej różnice dochodowe między kobietami i mężczyznami w różnych grupach dochodowych. Następnie dokonano porównania między podpróbami kobiet i mężczyzn uzyskujących najwyższe dochody (przyjęto próg 3% dla każdej płci). Przedstawiono również udział kobiet w grupie osób o najwyższych dochodach. Przeprowadzona analiza ujawniła m.in. zróżnicowanie dynamiki dochodów kobiet i mężczyzn, co stanowi argument za uwzględnieniem w analizie nierówności dochodowych także czynników cyklicznych, które mogą odmiennie oddziaływać na obie płci.

4

Effect of Income Inequality on Health Status in a Selection of Middle and Low Income Countries

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Hajebi E., Razmi M. J.

Equilibrium. Quarterly Journal of Economics and Economic Policy

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2014

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vol. 9

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issue 4

133-152

EN

The relationship between the public health status and income inequality has been taken into consideration in the last two decades. One of the important questions in this regard is that whether the changes in income inequality will lead to changes in health indicators or not. To answer this question, life expectancy is used as a health indicator and the Gini coefficient is used as an income inequality indicator. In this study, the relationship between income inequality and the public health has been investigated by panel data in Eviews software during 2000–2011 in 65 low-and middle-income countries. By using panel data and considering fixed effects and heterogeneity of sections, the relationship between income inequality and public health status is a significant negative relationship.

5

Etyczne aspekty zróżnicowania dochodów

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Wyżnikiewicz B.

Annales. Etyka w Życiu Gospodarczym

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2019

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vol. 22

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issue 3

75-85

EN

Personal income differentiation (inequality) is widely observed. Various historical and cultural factors are responsible for this phenomenon. In the longer run, these factors lead to a log-normal distribution of income with country-specific parameters. Ethical aspects of income differentiation are discussed in this paper. The starting point for the discussion is a diagnosis of income differentiation in Poland and European Union countries based on statistical data. Another discussed issue is ethical dilemmas resulting from income inequalities. Special attention is paid to the relationship between income differentiation and economic growth. The ethical aspects of the ratio between lower and upper income in corporations are also discussed. The conclusion is that income differentiation and its change may influence economic growth in different ways. Extremely high income differentiation may lead to negative effects and is ethically doubtful.

6

The Effects of Housing Prices on Income Inequality in Urban China

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Zhang C., Zhang F.

Critical Housing Analysis

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2015

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vol. 2

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issue 2

11-18

EN

This paper explores the effects of housing prices on income inequality in urban China. The authors use China's interprovincial panel data for the period between 1999 and 2011 and find that there is a significant positive association between housing prices and the Gini coefficient of the income of urban residents, and that there are remarkable regional disparities.

7

Estimating the parameter of inequality aversion on the basis of a parametric distribution of incomes

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Kot S. M.

Equilibrium. Quarterly Journal of Economics and Economic Policy

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2020

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vol. 15

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issue 3

391-417

EN

Research background: In applied welfare economics, the constant relative inequality aversion function is routinely used as the model of a social decisionmaker?s or a society?s preferences over income distributions. This function is entirely determined by the parameter, ?, of inequality aversion. However, there is no authoritative answer to the question of what the range of ? an analyst should select for empirical work. Purpose of the article: The aim of this paper is elaborating the method of deriving ? from a parametric distribution of disposable incomes. Methods: We assume that households? disposable incomes obey the generalised beta distribution of the second kind GB2(a,b,p,q). We have proved that, under this assumption, the social welfare function exists if and only if ? belongs to (0,ap+1) interval. The midpoint ?mid of this interval specifies the inequality aversion of the median social-decisionmaker. Findings & Value added: The maximum likelihood estimator of ?mid has been developed. Inequality aversion for Poland 1998?2015 has been estimated. If inequality is calculated on the basis of disposable incomes, the standard inequality?development relationship might be complemented by inequality aversion. The ?augmented? inequality?development relationship reveals new phenomena; for instance, the stage of economic development might matter when assessing the impact of inequality aversion on income inequality.

8

Human Capital Versus Income Variations: Are They Linked in OECD Countries?

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Bartak J., Jabłoński Ł.

Journal of Management and Business Administration. Central Europe

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2016

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issue 2

56-73

EN

Purpose: The theory of endogenous growth suggests a number of relations between income inequality and human capital. However, empirical evidence in this field is scarce. Therefore, in this paper we aim to demonstrate the existence of interdependencies between income inequality and human capital across OECD countries.Methodology: We present findings of the endogenous growth theory on the mechanisms linking inequality with human capital. Subsequently, we attempt to verify these links empirically using the regression function estimated by means of the generalized method of moments (GMM). The empirical analysis is based on panel data from 1995–2010.Findings: The results of the study reveal the existence of a negative relationship between income inequality and health indicators (infant mortality and maternal mortality). However, we did not reach an authoritative conclusion about the relationship between income inequality and quantitative indicators of educational achievement.Research limitations: Research is limited to the sample of OECD countries. Interdependencies between income inequality and human capital could be captured more clearly using a broader sample.Originality: This paper presents one of few studies testing the relation between human capital and income inequality. The use of high-quality empirical data on inequality (SWIID data) and the generalized method of moments made it possible to contribute new arguments to the discussion of empirical analyses of these economic categories.

9

Income inequality as part of new economic and social conditions of business

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Kuzmišinová V.

Społeczeństwo i Edukacja. Międzynarodowe Studia Humanistyczne

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2013

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issue 2(12)

417-429

10

100%

Muszyńska J., Wędrowska E.

Econometrics. Ekonometria. Advances in Applied Data Analytics

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2018

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issue vol. 22 no. 4

43-64

EN

A formula of measures applied to assess the level of income inequality results from the intellectual basis on which this approach is founded. Our paper focuses on Generalized Entropy measures. The aim of our paper is two-fold. Firstly, it aims at presenting GE measures and discussing their properties, especially the property of additive decomposition. Secondly, the empirical aim is to assess the level of income inequality in Poland and to indicate its main determinants. In the study we use microdata obtained from EU-SILC that cover information about incomes received by individual household members in 2016. Five factors are chosen as the possible drivers of income inequality. The study proves the characteristics related to human capital are the most influential factors of income variability between households. The characteristics describing the composition of the household contribute to the overall level of inequality to a smaller extent.

18

Estimation of Income Inequality and the Poverty Rate in Poland, by Region and Family Type

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Jędrzejczak A., Kubacki J.

Statistics in Transition new series

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2014

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vol. 15

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issue 3

359-378

EN

High income inequality can be a source of serious socio-economic problems, such as increasing poverty, social stratification and polarization. Periods of pronounced economic growth or recession may impact different groups of earners differently. Growth may not be shared equally and economic crises may further widen gaps between the wealthiest and poorest sectors. Poverty affects all ages but children are disproportionately affected by it. The reliable inequality and poverty analysis of both total population of households and subpopulations by various family types can be a helpful piece of information for economists and social policy makers. The main objective of the paper was to present some income inequality and poverty estimates with the application to the Polish data coming from the Household Budget Survey. Besides direct estimation methods, the model based approach was taken into regard. Standard errors of estimates were also considered in the paper.

19

Nierówności dochodowe w krajach postsocjalistycznych – analiza wybranych determinant

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Wesołowska M. A.

Gospodarka Narodowa. The Polish Journal of Economics

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2024

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vol. 317

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issue 1

73-90

EN

The purpose of this article is to present and analyse selected factors of income inequality associated with the labour market, socioeconomic conditions, tax systems, globalisation, freedom and financialisation in the post-socialist countries of Central and Eastern Europe and Central Asia from 1991 to 2019. Income inequality has significantly increased since the economic transition of the early 1990 s. The initial sharp increase in the Gini coefficient was partly expected due to institutional changes following the departure from the communist system, which kept inequality at a low level for ideologic reasons. However, the long-term development of income stratification depended on the approach taken by newly established institutions, external factors, and the preconditions of the transition. Research methods used in this study included cluster analysis employing Ward’s method, cross-sectional and panel regression, statistical analysis, and regression tree analysis with the CART algorithm. The results reveal the existence of several dominant trends in the development of income inequality and a link between the preconditions of economic transformation and the further evolution of the Gini coefficient. The study also identifies the most significant determinants and analyses their co-occurrence.

PL

Celem artykułu jest przedstawienie i przeanalizowanie wybranych czynników nierówności dochodowych związanych z rynkiem pracy, sytuacją społeczno-ekonomiczną, systemem podatkowym, globalizacją, wolnością oraz finansjalizacją w krajach postsocjalistycznych z obszaru Europy Środkowo-Wschodniej i Azji Centralnej w latach 1991–2019. W okresie transformacji gospodarczej nierówności dochodowe znacznie wzrosły na początku lat 90. XX w. Początkowy, gwałtowny wzrost współczynnika Giniego był częściowo oczekiwany ze względu na liczne zmiany instytucjonalne, wynikające z odejścia od systemu komunistycznego, ideologicznie utrzymującego nierówności na niskim poziomie, jednak w dłuższej perspektywie pogłębienie się rozwarstwienia dochodowego zależało od wypracowanego przez nowo powstałe instytucje podejścia, czynników zewnętrznych i samych warunków wstępnych transformacji. Jako metody badawcze wykorzystano analizę skupień metodą Warda, regresję przekrojową i panelową, analizę statystyczną oraz drzewo regresyjne z algorytmem CART. Uzyskane wyniki wskazują na występowanie kilku dominujących tendencji rozwojowych nierówności dochodowych na badanym obszarze i powiązanie warunków wstępnych transformacji gospodarczej z dalszym rozwojem współczynnika Giniego. Badanie pozwoliło również wyodrębnić najistotniejsze determinanty oraz przeanalizować zależności ich współwystępowania.

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Bezwarunkowy dochód podstawowy jako instrument ograniczenia nierówności dochodowych

89%

Misztal P.

Ruch Prawniczy, Ekonomiczny i Socjologiczny

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2018

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vol. 80

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issue 2

171-182

EN

The unconditional basic income is the income allotted to all members of society individually, without them having to provide work instead. The right to this income and its level are unconditional and independent of the size and structure of households. In addition, unconditional income is paid regardless of the citizens’ income from other sources. The aim of this paper was to conduct a theoretical and empirical analysis of the unconditional basic income, with particular emphasis on the genesis and effects of the implementation of such a mechanism. The research methods used in the paper have been based on literature presenting studies in macroeconomics and economic policy as well as on the data obtained using statistical and descriptive methods published by the Organisation for Economic Co-operation and Development.

PL

Bezwarunkowym dochodem podstawowym jest dochód przyznany wszystkim członkom społeczeństwa indywidualnie, bez konieczności świadczenia pracy. Prawo do tego dochodu i jego poziom mają charakter bezwarunkowy i są niezależne od wielkości i struktury gospodarstw domowych. Ponadto dochód bezwarunkowy jest wypłacany bez względu na dochody obywateli pochodzące z innych źródeł. Celem artykułu jest analiza teoretyczna i empiryczna koncepcji bezwarunkowego dochodu podstawowego ze szczególnym uwzględnieniem genezy oraz skutków wprowadzenia tego mechanizmu. W tekście wykorzystano metodę badawczą opartą na studiach literaturowych z zakresu makroekonomii i polityki gospodarczej oraz metody statystyczno-opisowe na podstawie danych publikowanych przez Organizację Współpracy Gospodarczej i Rozwoju.

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W POSZUKIWANIU “OGÓLNEJ TEORII WSZYSTKIEGO”: CZY NIERÓWNOŚCI DOCHODOWE RZECZYWIŚCIE NAM SZKODZĄ?

Economic growth and the optimal inequality of income

Gender differences in income distributions in Poland

Effect of Income Inequality on Health Status in a Selection of Middle and Low Income Countries

Etyczne aspekty zróżnicowania dochodów

The Effects of Housing Prices on Income Inequality in Urban China

Estimating the parameter of inequality aversion on the basis of a parametric distribution of incomes

Human Capital Versus Income Variations: Are They Linked in OECD Countries?

Income inequality as part of new economic and social conditions of business

Wzrost gospodarczy a optymalne zróżnicowanie dochodów w USA i Szwecji

Universal basic income. Theory and practice

Nierówności dochodowe a zadłużenie publiczne krajów OECD