Is there a tradeoff between raising growth and reducing inequality and poverty? This paper reviews the theoretical and empirical literature on the complex links between growth, inequality, and poverty, with causation going in both directions. The evidence suggests that growth can be effective in reducing poverty, but its impact on inequality is ambiguous and depends on the underlying sources of growth. The impact of poverty and inequality on growth is likewise ambiguous, as several channels mediate the relationship. But most plausible mechanisms suggest that poverty and inequality reduce growth, at least in the long run. Policies play a role in shaping these relationships and those designed to improve equality of opportunity can simultaneously improve inclusiveness and growth.

The contributors argue that there need not be a trade-off between growth and equity in the long run. However, attempts by government to influence income distribution through large-scale tax and transfer programs can have a negative impact on growth. The contrast is vivid. While the majority of people in the industrial world and some in the developing world enjoy unprecedented affluence, a far greater number of people in the low-income countries live in abject poverty. Although several developing countries are achieving rapid economic growth and poverty reduction, most formerly centrally planned countries are struggling to implement market-oriented reforms in the midst of economic deterioration and rising poverty. The paramount importance of reducing poverty worldwide is forcing economists and policymakers to look at how income distribution and economic growth interact. The essays in this volume grew out of a 1995 conference sponsored by the International Monetary Fund. The contributors are scholars and policymakers from academic institutions, governments, and international organizations. The questions discussed include: How does income distribution interact with economic growth in the short run and the long run? To what extent can government use transfer programs to increase the incomes of the poor? How can government use social programs to help the poor increase their income-earning capacity? Does distributional inequality create an obstacle to long-term poverty reduction? Alternatively, is distributional inequality a necessary means of achieving economic growth? Generally, the contributors agree that there need not be a trade-off between growth and equity in the long run. However, attempts by government to influence income distribution through large-scale tax and transfer programs can have a negative impact on growth.

This report provides evidence of a fairly generalised increase in income inequality over the past two decades across OECD countries, but the timing, intensity and causes of the increase differ from what is typically suggested in the media.

This paper analyzes the extent of income inequality from a global perspective, its drivers, and what to do about it. The drivers of inequality vary widely amongst countries, with some common drivers being the skill premium associated with technical change and globalization, weakening protection for labor, and lack of financial inclusion in developing countries. We find that increasing the income share of the poor and the middle class actually increases growth while a rising income share of the top 20 percent results in lower growth—that is, when the rich get richer, benefits do not trickle down. This suggests that policies need to be country specific but should focus on raising the income share of the poor, and ensuring there is no hollowing out of the middle class. To tackle inequality, financial inclusion is imperative in emerging and developing countries while in advanced economies, policies should focus on raising human capital and skills and making tax systems more progressive.

The relationship between growth, inequality, and poverty lies at the heart of development economics. This volume draws together many of the most important recent contributions to the controversies surrounding this topic. Some of the chapters help explain why there is profound disagreement on crucial issues of growth, poverty and inequality within academic circles, and among organizations and various groups active in the development field. Another central theme is the cross-country evidence on the relationship between growth and poverty, and the extent to which it is valid to draw policy conclusions from this empirical evidence. The volume also shows how new microeconomic techniques such as poverty maps and microsimulation models can be used to improve poverty analysis and the design of pro-poor policies. The overall conclusion points to the need for diverse strategies towards growth and poverty, rather than simple blanket policy rules. Initial conditions, specific country structures, and time horizons all play a significant role. Initial conditions affect the speed with which growth reduces poverty and can also determine whether policies such as trade liberalization have a pro-poor or an anti-poor outcome. Improved education is valuable in itself, and also contributes to poverty reduction; but its effect on inequality depends on supply and demand factors, which differ significantly across countries. Likewise, the quantitative impact on poverty of redistribution from the rich to the poor vis-a-vis an increase in total national income can vary greatly across countries. Hence the need for creative approaches to poverty which take full account of the specific circumstances of individual nations and which assign a central role to inequality analysis in the discussion of poverty-alleviation policies.

One side in the current debate about who benefits from growth has focused solely on average impacts on poverty and inequality, while the other side has focused on the diverse welfare impacts found beneath the averages. Both sides have a point.