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1. Poverty, Pro-Poor Growth and Mobility: A Decomposition Framework with Application to China

Author:
Guanghua Wan and Yin Zhang
Publication Date:
12-2006
Content Type:
Working Paper
Institution:
United Nations University
Abstract:
This paper proposes a framework for incorporating longitudinal distributional changes into poverty decomposition. It is shown that changes in the Sen-Shorrocks-Thon index over time can be decomposed into two components—one component reflects the progressivity of income growth among the original poor, the other measures the extent of downward mobility experienced by the incumbent poor. The decomposition is applied to appraising poverty trends in China between 1988 and 1996. The results indicate that the proposed decomposition can complement the widely-used growthdistribution decomposition in providing insights into poverty dynamics.
Topic:
Development and Poverty
Political Geography:
China and Asia

2. Poverty Reduction in China: Trends and Causes

Author:
Guanghua Wan and Yin Zhang
Publication Date:
12-2006
Content Type:
Working Paper
Institution:
United Nations University
Abstract:
Applying the Shapley decomposition to unit-record household survey data, this paper investigates the trends and causes of poverty in China in the 1990s. The changes in poverty trends are attributed to two proximate causes; income growth and shifts in relative income distribution. The Foster-Greer-Thorbecke measures are computed and decomposed, with different datasets and alternative assumptions about poverty lines and equivalence. Among the robust results are: (i) both income growth and favourable distributional changes can explain China's remarkable achievement in combating poverty in rural areas in the first half of the 1990s; (2) in the second half of the 1990s, both rural and urban China suffered from rapidly rising inequality and stagnant income growth, leading to a slow-down in poverty reduction, even reversal of poverty trend.
Topic:
Development, Economics, and Poverty
Political Geography:
China and Asia

3. The Public Distribution Systems of Foodgrains and Implications for Food Security: A Comparison of the Experiences of India and China

Author:
Guanghua Wan and Zhang-Yue Zhou
Publication Date:
09-2006
Content Type:
Working Paper
Institution:
United Nations University
Abstract:
A comparative study of the public distribution systems of foodgrains in India and China is expected to reveal lessons and experiences that are valuable to policymakers. This is particularly important for developing countries in their endeavour to ensure food security. This paper undertakes such an exercise. The main features and developments of the two public distribution systems are first highlighted. This is followed by a comparative analysis of their similarities and differences. The role of public foodgrain distribution systems in ensuring food security is then evaluated. Finally, policy implications are drawn.
Topic:
Human Welfare and Poverty
Political Geography:
China, India, and Asia

4. The Impacts of Growth and Inequality on Rural Poverty in China

Author:
Guanghua Wan and Yin Zhang
Publication Date:
08-2006
Content Type:
Working Paper
Institution:
United Nations University
Abstract:
This paper analyzes the evolution of poverty in China from the late 1980s to the late 1990s, employing a version of Shapley decomposition tailored to unit-record household survey data. The changes in poverty trends are attributed to two proximate causes— income growth and shifts in income distribution. Different datasets, poverty lines, poverty measures, and equivalence scales are used to examine the robustness of the results. Potential biases arising from ignoring differential regional prices and inflation are also investigated. Notwithstanding some ambiguities in the results, it is consistently found that rural poverty increased in the second half of the 1990s and adverse distributional changes are the main cause.
Topic:
Demographics, Development, and Poverty
Political Geography:
China and Asia

5. Poverty Accounting by Factor Components: With an Empirical Illustration Using Chinese Data

Author:
Guanghua Wan
Publication Date:
06-2006
Content Type:
Working Paper
Institution:
United Nations University
Abstract:
The purpose of this paper is to develop two poverty decomposition frameworks and to illustrate their applicability. A given level of poverty is broadly decomposed into an overall inequality component and an overall endowment component in terms of income or consumption determinants or input factors. These components are further decomposed into finer components associated with individual inputs. Also, a change in poverty is decomposed into components attributable to the growth and redistributions of factor inputs. An empirical illustration using Chinese data highlights the importance of factor redistributions in determining poverty levels and poverty changes in rural China.
Topic:
Development, Economics, and Poverty
Political Geography:
China and Asia

6. Globalization and the Urban Poor in China

Author:
Guanghua Wan and Yin Zhang
Publication Date:
04-2006
Content Type:
Working Paper
Institution:
United Nations University
Abstract:
This paper examines the distributional impact of globalization on the poor in urban China. Employing the kernel density estimation technique, we recovered from irregularly grouped household survey data the income distribution for 29 Chinese provinces for 1988-2001. Panels of the income shares of the poorest 20, 10 and 5 per cent of the urban residents were then compiled. In a fixed-effect model, two of the central conclusions of Dollar and Kraay (2002)—that 'the incomes of the poor rise equi-proportionately with average income' and that trade openness has little distributional effect on poverty—were revisited. Our results lend little support to either of the Dollar-Kraay conclusions, but instead indicate that average income growth is associated with worsening income distribution while globalization in general, and trade openness in particular, raises the income shares of the poor. It is also found that openness to trade and openness to FDI have differential distributional effects. The beneficial effect of trade was not restricted to the coastal provinces only, but also weakened significantly after 1992. These findings are robust to allow for nonlinearity in the effect of globalization and to control for the influence of several other variables.
Topic:
Economics, Globalization, and Poverty
Political Geography:
China and Asia

7. Why Do Poverty Rates Differ From Region to Region? The Case of Urban China

Author:
Guanghua Wan and Yin Zhang
Publication Date:
08-2005
Content Type:
Working Paper
Institution:
United Nations University
Abstract:
This paper proposes a semi-parametric method for poverty decomposition, which combines the data-generating procedure of Shorrocks and Wan (2004) with the Shapley value framework of Shorrocks (1999). Compared with the popular method of Datt and Ravallion (1992), our method is more robust to misspecification errors, does not require the predetermination of functional forms, provides better fit to the underlying Lorenz curve and incorporates the residual term in a rigorous way. The method is applied to decomposing variations of urban poverty across the Chinese provinces into three components – contributions by the differences in average nominal income, inequality and poverty line. The results foreground average income as the key determinant of poverty incidence, but also attach importance to the influence of distribution. The regional pattern of the decomposition suggests provincial groupings based not entirely on geographical locations.
Topic:
Demographics, Economics, and Poverty
Political Geography:
China and Asia

8. Spatial Decomposition of Inequality

Author:
Guanghua Wan and Anthony Shorrocks
Publication Date:
01-2004
Content Type:
Working Paper
Institution:
United Nations University
Abstract:
This paper reviews the theory and application of decomposition techniques in the context of spatial inequality. It establishes some new theoretical results with potentially wide applicability, and examines empirical evidence drawn from a large number of countries.
Topic:
Development, Globalization, and Poverty