Trade Liberalization and Spatial Inequality: a Methodological Innovation in a Vietnamese Perspective

The authors calibrate two static computable general‐equilibrium (CGE) models with 16 and 5999 representative households. Aggregated and disaggregated household categories are consistently embedded in a 2000 social accounting matrix (SAM) for Vietnam, mapping on a one‐to‐one basis. Distinct differences in poverty assessments emerge when the impact of trade liberalization is analyzed in the two models. This highlights the importance of modeling micro‐household behavior and related income and expenditure distributions endogenously within a static CGE model framework. The simulations indicate that poverty will rise following a revenue‐neutral lowering of trade taxes. This is interpreted as a worst‐case scenario, which suggests that the government should be proactive in combining trade liberalization measures with a pro‐poor fiscal response to avoid increasing poverty in the short to medium term.     

The Elasticity of Poverty with respect to Sectoral Growth in Africa

The African continent has grown by more than 4 percent yearly on average during the past decade. However, the link between this remarkable growth rate and poverty reduction is neither obvious nor simple. This paper focuses on the elasticity of poverty with respect to GDP growth at the sectoral level and takes into account the fact that economic growth may affect poverty directly as well as indirectly through sectoral labor share intensity. It develops a methodology that sheds light on the contribution of sectoral growth to poverty reduction country‐by‐country in Africa, guiding policy recommendations. As the composition of growth matters at least as much as its overall intensity, it is key to identify the sectors that have the strongest impact on poverty reduction and unleash their potential; if growth happens to concentrate in sectors with scarce pro‐poor potential, like commodity‐driven growth, redistributive strategies are necessary to compensate the weak effect on poverty.     

The (evolving) role of agriculture in poverty reduction—An empirical perspective

The role of agriculture in development remains much debated. This paper takes an empirical perspective and focuses on poverty, as opposed to growth alone. The contribution of a sector to poverty reduction is shown to depend on its own growth performance, its indirect impact on growth in other sectors, the extent to which poor people participate in the sector, and the size of the sector in the overall economy. Bringing together these different effects using cross-country econometric evidence indicates that agriculture is significantly more effective in reducing poverty among the poorest of the poor (as reflected in the $1-day squared poverty gap). It is also up to 3.2 times better at reducing $1-day headcount poverty in low-income and resource rich countries (including those in Sub-Saharan Africa), at least when societies are not fundamentally unequal. However, when it comes to the better off poor (reflected in the $2-day measure), non-agriculture has the edge. These results are driven by the much larger participation of poorer households in growth from agriculture and the lower poverty reducing effect of non-agriculture in the presence of extractive industries.     

POVERTY EQUIVALENT GROWTH RATE

This paper proposes a new type of growth rate, called the “poverty equivalent growth rate” (PEGR), which takes into account both the growth rate in mean income and how the benefits of growth are distributed between the poor and the non‐poor. The proposed measure satisfies a basic requirement that the proportional reduction in poverty is a monotonically increasing function of the PEGR. Thus, maximizing the PEGR implies a maximum reduction in poverty. The paper demonstrates that the magnitude of PEGR determines the pattern of growth: whether growth is pro‐poor in relative or absolute sense or is “poverty reducing” pro‐poor. The pattern of growth has been analyzed for Brazil using the National Household Survey (PNAD) covering the period 1995–2005.     

Work‐Related Migration and Poverty Reduction in Nepal

Using two rounds of nationally representative household survey data in this study, we measure the impact on poverty in Nepal of local and international migration for work. We apply an instrumental variables approach to deal with nonrandom selection of migrants and simulate various scenarios for the different levels of migration comparing observed and counterfactual household expenditure distribution. Our results indicate that one‐fifth of the poverty reduction in Nepal occurring between 1995 and 2004 can be attributed to higher levels of work‐related migration and remittances sent home. We also show that while the increase in international work‐related migration was the leading cause of this poverty reduction, domestic migration also played an important role. Our findings demonstrate that strategies for economic growth and poverty reduction in Nepal should consider aspects of the dynamics of domestic and international migration.     

中国城市老年人贫困程度的探讨

根据国际流行的贫困距指数研究方法，在中国老龄科研中心1992年调查和2000年调查数据的基拙上，以城市老年人家庭作为计量单位，从支出口径探讨了中国部分省、直辖市的城市老年人90年代贫困的状况和发展趋势。对比了两次调查相同省份城市低收入老年人群体的收入变化情况。这一特定群体的老年人在90年代收入增长缓慢，有可能陷入以收入口径侧量的深度贫困。对如何改善城市贫困老年人的救助提出了对策建议。     

中国扶贫资金支出结构的动态减贫效果研究

文章从理论上总结扶贫资金支出对农村贫困的减贫效果,构建扶贫资金支出与农村贫困的理论分析框架,提出扶贫资金对农村贫困发生率、农村贫困深度、农村贫困强度具有正向减贫效果的研究假设,以宏观调查数据度量我国农村贫困程度,揭示我国农村贫困的变化趋势,并运用脉冲响应函数分析方法,对扶贫资金支出结构的动态减贫效果进行了分析,结果显示:扶贫专项贷款对农村贫困发生率具有正向减贫效果;以工代赈资金对农村贫困发生率、农村贫困深度以及农村贫困强度具有正向减贫效果;扶贫发展资金对农村贫困深度具有正向减贫效果,而扶贫专项贷款对农村贫困强度的冲击则显示出负向减贫效果;扶贫发展资金对农村贫困强度具有显著负效应。据此,文章提出改善扶贫资金支出结构的相关政策建议。     

Dependency traps in self‐targeting food aid programs

We present an economy of farmers where food aid is warranted due to poverty traps triggered by nonconvex production sets. We model a food‐aid intervention as a dynamic game between a food‐aid manager and the farmers in a context of asymmetrical information. The food‐aid manager is motivated by a relief objective and targets farmers suffering the poverty trap. The food‐aid manager uses a self‐targeting mechanism by providing the aid through a food wage in exchange for participation in the intervention's activities. Guided by the relief objective and targeting constraint, he fixes the food wage equal to the reservation wage of the farmers not suffering the poverty trap. Dependency traps will then happen every time there is a considerable technological and nutritional gap between farmers who are in and out of the poverty trap. When there is a gap, poor farmers earn more working for the reservation wage of the well‐off farmers than by working in their own farm. Dependency can be overcome only if the food‐aid program allows farmers to upgrade their productive technologies and catch up with those farmers who are out of the poverty trap.     

The effect of transfers on household expenditure patterns and poverty in South Africa

This paper uses household level unit record data from South Africa to examine the behavioural and welfare impacts of private and public transfers. We allow for joint endogeneity of resource variables and the expenditure shares. Our results show that crowding out of private transfers as a result of the introduction of public pensions holds only for poor households and not for the non-poor. Both private transfers and public pensions significantly reduce poverty but private transfers have a larger impact on expenditure patterns. The results also reject the hypothesis of income pooling underlying the conventional unitary model by finding that the marginal impact on expenditures are different for public pension received, private transfer received and other resources flowing into the household. The principal conclusions are robust to changes in specification.     

中国城市老年人贫困程度的探讨

根据国际流行的贫困距指数研究方法,在中国老龄科研中心1992年调查和2000年调查数据的基础上,以城市老年人家庭作为计量单位,从支出口径探讨了中国部分省、直辖市的城市老年人90年代贫困的状况和发展趋势。对比了两次调查相同省份城市低收入老年人群体的收入变化情况。这一特定群体的老年人在90年代收入增长缓慢,有可能陷入以收入口径测量的深度贫困。对如何改善城市贫困老年人的救助提出了对策建议。     

Equal opportunity and poverty reduction: How should aid be allocated?

This paper analyzes a model of aid allocation equalizing the opportunity between recipient countries to reach a common poverty reduction goal. We propose a fair and efficient aid allocation based on a multicriteria principle. The model considers structural handicaps in recipient countries in terms of lack of human capital and economic vulnerability, their initial poverty, and the natural gap between the growth rate required to reach a development goal and the observed one. We show that our proposed aid allocation favors poor and vulnerable countries with our multicriteria principle. It substantially differs from the observed allocation. Analyses also shed light on the impact of the donors' aversion to the low natural growth gap in recipient countries on the optimal aid allocation and the marginal efficiency of aid.     

International Market Access and Poverty in Argentina

This paper examines the impact of access to international agro‐manufacture markets on poverty in Argentina. Estimates from the literature suggest that expanded market access would cause the international price of Argentine exports of agro‐manufactures to increase by between 8.7% and 15.9%. I explore two poverty effects caused by these prices changes: on food expenditure and on wages. Using a household budget survey, I estimate the impact of higher food prices on the Argentine poverty line. Using a labor force survey, I estimate the responses of wages to changes in export prices. My main finding is that market access would cause poverty to decline in Argentina. From a national head count of 29.26%, the poverty rate would decline to between 28.28% and 28.80%. This means that between 161,000 and 343,000 Argentines would be moved out of poverty.     

Imitation and evolutionary stability of poverty traps

This paper develops a bioeconomic model applying evolutionary game theory to the notion of poverty traps. We study the evolution of the social norm of being either a high-type or low-type in a dynamic environment where agents are driven by an imitative behavior. History matters because given initial conditions, agents imitate according to their current success in payoffs and the current profile of economic agents in the economy. We define a poverty trap as an evolutionarily stable strategic profile and steady state of the replicator dynamics. We show that in poor economies with a large fraction of low-type agents imitative strategies do not support a take-off into sustained growth. To achieve that take-off, society should subsidize critical parameters of the expected payoffs such that economic agents may change the initial conditions and the economy gets a critical mass of high-type economic agents, and so to overcome the poverty trap.     

The Pro‐Poorness,Growth and Inequality Nexus: Some Findings From a Simulation Study

An income growth pattern is pro‐poor if it reduces a (chosen) measure of poverty by more than if all incomes were growing equiproportionately. Inequality reduction is not sufficient for pro‐poorness. In this paper, we explore the nexus between pro‐poorness, growth, and inequality in some detail using simulations involving the displaced lognormal, Singh–Maddala, and Dagum distributions. For empirically relevant parameter estimates, distributional change preserving the functional form of each of these three‐parameter distributions is often either pro‐poor and inequality reducing, or pro‐rich and inequality exacerbating, but it is also possible for pro‐rich growth to be inequality reducing. There is some capacity for each of these distributions to show trickle effects (weak pro‐richness) along with inequality‐reducing growth, but virtually no possibility of pro‐poorness for growth which increases overall inequality. Implications are considered.     

Shocks, Policy Reforms and Pro-Poor Growth in Bolivia: A Simulation Analysis

This paper analyzes how major external shocks and policy reforms affect Bolivia’s ability to achieve pro‐poor growth. Employing a recursive‐dynamic CGE model, it considers three different scenarios: an optimistic baseline scenario; a more realistic scenario that accounts for two important negative external shocks (declining capital inflows and El Niño); and a scenario that captures the combined effect of the shocks and two major reform projects (development of the gas sector and deregulation of the urban labor market). It turns out that the shocks are likely to impair Bolivia’s medium‐term development prospects, leading to marked increases in both urban and rural poverty. If the reform projects were implemented, the poverty increase caused by the shocks would be more than offset for urban households, but reinforced for rural households.     

Domestic agricultural value chain development and pro‐poor growth: A computable general equilibrium microsimulation application for the Democratic Republic of Congo

The economy of the Democratic Republic of Congo has gained momentum between 2003 and 2015, with a high annual growth rate of over 6%. However, poverty and employment outcomes were relatively poor, while inequality increased. This study uses a computable general equilibrium (CGE) microsimulation model to study the pro‐poor effect of alternative growth strategy that is likely to strengthen the competitiveness of agro‐food products from the Congo. We experimented with three different scenarios: labor productivity growth, marketing efficiency, and transportation efficiency. The simulations demonstrated that improving the productivity of workers in agro‐food industries has not only produced strong relative pro‐poor effects, but also has the potential to lead to income convergence between rich and poor households. The analysis also revealed the underestimated contribution of agro‐food marketing and transportation efficiency. The major finding is that marketing efficiency favors the middle class. Efficiency gains in the transportation of agro‐food products generate strong pro‐poor effects in absolute and relative terms and are likely to be particularly effective in leading to income convergence. This policy has the potential not only to increase income and employment, but also to provide positive price impacts for both producers and consumers and benefits to all households, particularly low‐income households.     

益贫式增长的内涵及其实现路径：一个文献综述

益贫式增长是对穷人有利的经济增长,它关注穷人在经济增长中的受益程度,被认为是有效减贫的最佳经济增长模式。益贫式增长理论认为经济增长是减贫的最大动力,但是经济增长是减贫的必要而非充分条件,高速的经济增长必须配合更公平的收入分配制度才能实现贫困快速下降。实现益贫式增长主要有两种途径：一种是通过经济增长直接提高穷人收入;另一种是通过政府公共再分配使贫困人口从经济增长中间接获益。本文通过对益贫式增长的含义及其实现路径相关文献进行回顾和总结,以期为学界进一步研究提供参考。     

Aid volatility and poverty traps

This paper studies the impact of aid volatility in a two-period model where production may occur with either a traditional or a modern technology. Public spending is productive and “time to build” requires expenditure in both periods for the modern technology to be used. The possibility of a poverty trap induced by high aid volatility is first examined in a benchmark case where taxation is absent. The analysis is then extended to account for self insurance (taking the form of a first-period contingency fund) financed through taxation. An increase in aid volatility is shown to raise the optimal contingency fund. But if future aid also depends on the size of the contingency fund (as a result of a moral hazard effect on donors' behavior), the optimal policy may entail no self insurance.