Income inequality and economic growth

Despite the extensive existing literature on income inequality and economic growth, there remains considerable disagreement on the effect of inequality on economic growth. Existing literatures find either a positive or a negative relationship. In this paper, we attempt to theoretically examine that relationship with a stochastic optimal growth model. We make the disagreement clear within a single model. We conclude (i) that both are possible – that is, higher inequality can retard growth in the early stage of economic development, and can encourage growth in a near steady state, (ii) that income redistribution by high income tax does not always reduce income inequality. Income inequality can be reduced by higher income tax in a near steady state, but it cannot be reduced in the early stage of economic development, and (iii) that two government polices – rapid economic growth and low income inequality – can be achieved by low income tax in the early stage of economic development, but both cannot be achieved simultaneously in a near steady state.     

Income inequality and economic growth—the Kuznets curve revisited

In a neoclassical growth framework with a typical political-economy mechanism, this paper reexamines the relationship between the income inequality and economic growth by introducing government spending into the production function and the utility function. It demonstrates that Kuznets’ famous inverted-U shape relationship between inequality and economic growth will hold—the growth rate will be first increasing with the income inequality before the growth rate decreases with inequality. __________ Translated from The Journal of World Economy (世界经济), 2005,(5) (in Chinese)     

Measuring inequality change in an economy with income growth

This paper analyzes how to measure changes in inequality in an economy with income growth. The discussion distinguishes three stylized kinds of economic growth:

• 1.(1) high income sector enrichment,
• 2.(2) low income sector enrichment,
• 3.(3) high income sector enlargement, in which the high income sector expands and absorbs persons from the low income sector.

Th e two enrichment types pose no problem for assessing inequality change in the course of economic growth: for high income sector enrichment growth, inequality might reasonably be said to increase, whereas for low income sector enrichment, inequality might be said to decrease. These adjustments are non-controversial and non-problematical. Where problems arise is in the case of high income sector enlargement growth. In that case, the two alternative approaches have been shown in this paper to yield markedly results:

• 1.(1) The traditional inequality indices generate an inverted-U pattern of inequality. That is, inequality rises in the early stages of high income sector enlargement growth and falls thereafter.
• 2.(2) The new approach suggested here, based on axioms of gap inequality and numerical inequality, generates a U pattern of inequality. That is, inequality falls in the early stages of high income sector enlargement growth and rises thereafter.

The discrepancy between the familiar indices and the alternative approach based on axioms of gap inequality and numerical inequality bears further scrutiny. Two courses of action are possible. One might try to axiomatize inequality in ways that generate an inverted-U pattern in high income sector enlargement growth, thereby rationalizing the continued use of the usual inequality indices with the inverted-U property. Alternatively, one might retain the axioms proposed here, embed them into a more formal structure, and construct a family of inequality indices consistent with them. Others might wish to pursue the first course; I am at work on the second.     

Time-varying linkages between tourism receipts and economic growth in a small open economy

The causal link between tourism receipts and GDP has recently become the major focus of some recent studies in tourism economics. Results obtained in these studies about the causal link appear to be sensitive with respect to the countries analyzed, sample period and methodology employed. Considering the sensitivity of the causal link, we use the rolling window and time-varying coefficients estimation methods to analyze the Granger causality based on Vector Error Correction Model (VECM). When applied to Turkey for the 1963–2006 periods, this methodology enables us to overcome differences in the outcome of the tests performed in other studies for tourism receipts and GDP. The findings of this paper are as follows: results from the full sample within the VECM model indicate that there is no Granger causality between the series, while the findings from the time-varying coefficients model based on the state-space model and rolling window technique show that GDP has no predictive power for tourism receipts; however, tourism receipts have a positive–predictive content for GDP following early 1980s.     

Income inequality, democracy and growth reconsidered

Persson and Tabellini (Persson, T., Tabellini, G., 1992a. Growth, distribution and politics. Eur. Econ. Rev. 36, 593–602; Persson, T., Tabellini, G., 1992b. Growth, distribution and politics. In: Cukierman, A., Hercowitz, Z., Leiderman, L. (Eds.), Political Economy, Growth, and Business Cycles. MIT Press, Cambridge, MA, pp. 3–22; Persson, T., Tabellini, G., 1994. Is inequality harmful for growth? Am. Econ. Rev. 84, 600–621) as well as Alesina and Rodrik (Alesina, A., Rodrik, D., 1992. Distribution, political conflict, and economic growth. In: Cukierman, A., Hercowitz, Z., Leiderman, L. (Eds.), Political Economy, Growth, and Business Cycles. MIT Press, Cambridge, MA, pp. 23–50; Alesina, A., Rodrik, D., 1994. Distributive politics and economic growth, Q. J. Econ. 109, 465–490) have argued that income inequality reduces economic growth rates among democracies because it promotes distributional struggles. In this paper I question the supportive evidence for a number of reasons. Measures of income distribution and democracy are unreliable and permit only very tentative conclusions. Changes in data sources or recoding of some influential cases affect results. It is questionable whether equality effects on growth apply only within democracies, as a median voter interpretation of this relationship should make one expect. The general idea that distributional struggle hurts the growth prospects of nations, however, receives some empirical support.     

Wealth inequality,governance and economic growth

Links between economic growth and inequality are of growing interest for researchers and policy makers. Previous studies of this relationship have focused mainly on inequalities in income rather than in wealth. Yet from many perspectives wealth inequality is arguably more important. Using a new panel data set from Credit Suisse for 45 sample countries over the period 2000–2012, this study investigates the effects of wealth inequality on economic growth. Empirical results from system GMM estimation suggest that the wealth inequality is negatively associated with cross-country economic growth. This result is robust to alternative estimators and measures of wealth inequality, as well as the econometric specification. Further empirical investigation reveals that impact of wealth inequality on growth is mitigated by better governance.     

Income distribution and growth in a monopolist economy

Journal of Economics -     

The impact of the informal economy on R&D,wage inequality and economic growth

We extend the existing research and development (R&D) growth literature by focusing on the short–medium–long run effects of the informal sector on R&D intensity, wage inequality and economic growth, and by considering 18 OECD countries between 1990 and 2008. We show that: the steady state is unique and stable; the share of informal economy (IE) in production affects negatively R&D intensity and wage equality; Nordic countries have the lowest share of IE in production, while Mediterranean countries have the highest share of IE, wage inequality and R&D intensity but R&D spillovers are lower.     

Income inequality analysis in the period of economic transformation in poland

This paper presents some statistical methods of income inequality analysis based on the theoretical income distribution models that are well-fitted to the empirical models. As theoretical curves, the lognormal, gamma, Burr Type XII, and the Dagum models were used. They were applied to the earnings distributions in Poland in the period of economic transformation from a centrally-planned to a market economy. On the basis of the Dagum model, showing the perfect consistency with the considered earnings distributions, the maximun likelihood estimators of inequality parameters and economic distance ratios between men and women were calculated.     

Relative deprivation,wealth inequality and economic growth

This paper presents an endogenous growth model where utility depends on relative deprivation as well as consumption. It is shown that a negative relationship exists between wealth inequality and equilibrium growth rate. In addition, if the concern for relative deprivation is strong enough, instantaneous utility decreases while aggregate income increases.      

Kaldorian dynamics in an open economy

In this paper, we formulate a Kaldorian business-cycle model in a small open economy. We consider the possibility of capital mobility, and both the system of fixed exchange rates and that of flexible exchange rates are studied. We investigate how changes of the parameter which represents the degree of capital mobility affect the dynamic characteristics of the model. Some numerical simulations are performed based on the analytical model.     

Dynamic collusion in an open economy

This paper provides an example of how opening a country to trade may decrease competition in an industry. This result, counter to conventional theory, occurs when one considers multi-period games.     

Wage norms in an open economy

Zusammenfassung Das Zusammentreffen einer Beschleunigung des Preisauftriebs und einer Erhöhung der Arbeitslosigkeit in den OECD-Ländern in den sechziger und siebziger Jahren überzeugte viele Wirtschaftswissenschafter und Wirtschaftspolitiker, daß es einer Einkommenspolitik bedürfe, um die diskretionäre Marktmacht von Unternehmen und Gewerkschaften einzuschränken. Zwei wichtige Varianten der Einkommenspolitik sind die produktivitätsorientierte Lohnpolitik, die das Wachstum der Geldlöhne vom Wachstum der gesamtwirtschaftlichen Produktivität und der gesamtwirtschaftlichen Preissteigerung abhängig macht, und das Skandinavische Modell, in welchem die Erhaltung der internationalen Wettbewerbsfähigkeit dadurch garantiert wird, daß das Wachstum der Geldlöhne gleich der Summe des Produktivitätswachstums im exponierten Sektor und der Preissteigerung der handelbaren Güter (in heimischer Währung) ist. Dieser Aufsatz zeigt, daß beide Arten der Einkommenspolitik äquivalent sind. Er untersucht auch die Rolle der Wechselkurse in diesen Modellen und verwendet das Ergebnis, daß in einer umfassenden Einkommenspolitik Lohnzurückhaltung durch eine Preispolitik in der Form einer Wechselkurspolitik ergänzt werden muß, um historische Ereignisse in einigen Ländern zu interpretieren.     

Price controls in an open economy

Wage and price controls have been increasingly called for as Western economies have experienced periods of stagflation. Part of their attractiveness has been due to the belief that they are an appropriate instrument to deal with a country's unsatisfactory balance-of-payments position. This paper evaluates the appropriateness of an incomes policy in an open economy. An optimally structured incomes policy, derived for a simple inflation model, is examined under alternative exchange rate regimes. The model, in the tradition of models by Gordon, Hicks, and Okun, is characterized by two output markets-one a flexible price market and one characterized by markup pricing-and by a single labor (input) market. This model is then used as the constraint set in a dynamic optimization problem. Both analytical and simulation results are presented. The results suggest that a direct price control program is not appropriate in an open economy.     

On the impact of innovation and inequality in economic growth

We present robust results on the empirical relationship among income inequality, innovation, and economic growth for a panel dataset of 74 countries over the period 1996–2014. We estimate pairwise causality tests to show that there is bidirectional causality between GDP per capita and R&D, while R&D causes the Gini index of income inequality, and it causes human capital. Allowing coefficients to be different across cross-sections of countries, we get in any case a pairwise bi-directionality. By dynamic panel data estimations, when regressing R&D on GDP per capita, we obtain a threshold value of 0.16% of R&D such that for values above it there is economic growth. While regressing R&D on the Gini index, we get a threshold of 0.10% of R&D above which, the income distribution begins to improve. Finally, we estimate a growth equation that depends on R&D, income inequality, and physical capital. We obtain two thresholds, one of 38.79 for the Gini (above which the economic growth decreases), and one of 0.06% for R&D such that above it, economic growth is rising.     

Income inequality and colonialism

This paper proposes that colonialism is a major explanation behind today's differences in income inequality across countries. We argue that income inequality has been higher in the colonies where the percentage of European settlers to total population was higher, as long as Europeans remained a minority. The countries where Europeans became the majority of the population did not suffer from high inequality. These initial differences continue to hold today. The empirical evidence we provide strongly supports our thesis.     

Relative labor demand in an open economy

This paper contributes to the discussion concerning the nature of the well-documented worsening of wage and employment inequality in western economies during the past three decades. It critically discusses the use of the traditional Heckscher and Ohlin approach to analyze the distributional effects of international competition. The paper also discusses an innovative theoretical scenario in order to effectively explain the empirical observations. The model overcomes the problem of a dichotomized labor market, which is an unfavorable result of the traditional approach. Furthermore, the factor-biased character of the technological change becomes endogenous as the strength of foreign competition and the induced incentives for technical innovations are taken into consideration. This paper was presented at the 55th International Atlantic Economic Conference, Vienna, Austria, March 12–16, 2003.     

Human capital, economic growth, and regional inequality in China

We show how regional growth patterns in China depend on regional differences in physical, human, and infrastructure capital as well as on differences in foreign direct investment (FDI) flows. We also evaluate the impact of market reforms, especially the reforms that followed Deng Xiaoping's “South Trip” in 1992 those that resulted from serious hardening of budget constraints of state enterprises around 1997. We find that FDI had a much larger effect on TFP growth before 1994 than after, and we attribute this to the encouragement of and increasing success of private and quasi-private enterprises. We find that human capital positively affects output and productivity growth in our cross-provincial study. Moreover, we find both direct and indirect effects of human capital on TFP growth. These impacts of education are more consistent than those found in cross-national studies. The direct effect is hypothesized to come from domestic innovation activities, while the indirect impact is a spillover effect of human capital on TFP growth. We conduct cost-benefit analysis of hypothetical investments in human capital and infrastructure. We find that, while investment in infrastructure generates higher returns in the developed, eastern regions than in the interior, investing in human capital generates slightly higher or comparable returns in the interior regions. We conclude that human capital investment in less-developed areas is justified on efficiency grounds and because it contributes to a reduction in regional inequality.