城镇化与城乡收入差距——基于省域面板模型的分析

本文运用全国数据，考察城镇化与城乡收入差距的动态变化关系，发现1990～2014年城镇化与城乡收入差距之间呈倒U型变化，其拐点在2005年。根据1996～2013年省域面板数据特征，使用空间面板模型进行分阶段检验，结果表明，1996～2004年城镇化扩大了城乡收入差距，而在2005～2013年城镇化缩小了城乡收入差距。同样利用1996～2013年省域面板数据，估算每个省份城镇化对城乡收入差距的影响效果，结果显示，城镇化缩小城乡收入差距的地区一般为东部沿海省份。可见，城镇化是否产生缩小城乡收入差距的效应是有阶段性和地区差异性的。就目前及未来而言，可以把城镇化作为缩小城乡收入差距的一个手段。但其真正发挥这个作用，还依赖于有关政策的完善与创新。对经济发展阶段较滞后的地区而言，应积极促进城镇化缩小城乡收入差距效果的到来。     

Is the locus of poverty changing?

Urbanization is now a dominant demographic phenomenon in low- and middle-income countries. By the year 2000, half of the world's population will live in urban areas; of this half, two thirds will be in developing countries, predominantly in Asia. Whether there will be a corresponding shift of poverty from rural to urban areas is the central question of this analysis. Evidence from cross-sectional, time-series, and case data indicates that the percent of poverty in urban areas is dependent on income levels, income growth, and income distribution. The evidence also indicates that the number of poor in rural areas will exceed those in urban areas well into the 21st century. These poverty and urbanization trends are significant politically, and important also with respect to food policy and required investments in agriculture.     

经济增长、产业结构变迁与城乡居民收入差距——基于PVAR模型的动态分析

本文运用 PVAR模型研究了我国1998～2012年的经济增长、产业结构变迁与城乡居民收入差距之间的动态关系。研究结果显示：经济增长短期内对城乡收入差距的影响具有缩小作用,但是长期来看,经济增长与城乡收入差距的变动存在相互促进作用;产业结构的调整与城乡收入差距的关系并不一致。产业结构的合理化调整有助于缩小城乡收入差距,而城乡收入差距的变动也存在促使产业结构合理化调整的推动力,产业结构的高级化缺乏缩小城乡收入差距变动的效果,同样当前城乡收入差距的变动不利于产业结构的高级化发展。     

Are African households (not) leaving agriculture? Patterns of households’ income sources in rural Sub-Saharan Africa

This paper uses comparable income aggregates from 41 national household surveys from 22 countries to explore the patterns of income generation among rural households in Sub-Saharan Africa, and to compare household income strategies in Sub-Saharan Africa with those in other regions. The paper seeks to understand how geography drives these strategies, focusing on the role of agricultural potential and distance to urban areas. Specialization in on-farm activities continues to be the norm in rural Africa, practiced by 52 percent of households (as opposed to 21 percent of households in other regions). Regardless of distance and integration in the urban context, when agro-climatic conditions are favorable, farming remains the occupation of choice for most households in the African countries for which the study has geographically explicit information. However, the paper finds no evidence that African households are on a different trajectory than households in other regions in terms of transitioning to non-agricultural based income strategies.     

Nutritional functional classification study of Panama

Despite significant progress, wide-spread malnutrition persists in Panama. This article describes a study which found that over half the malnutrition in the country is clustered in functional groups economically connected to the agricultural sector and which indicates that food availability is a serious problem for 25% of the population. Food intake deficits were equally prevalent among the urban and rural populations. Dietary composition was not seen as the principal problem; rather malnutrition problems are linked to low wages and poor access to public services. A nutrition policy for Panama must be centred first on employment and income generation, and then on extending and maintaining public health and nutrition services, particularly for the extremely poor in the central provinces. Food policy per se would not seem a priority area for public intervention.     

Evaluating the impact of reforming the food subsidy program in Egypt: A Mixed Demand approach

Food subsidy is one of the policies considered to protect consumer welfare against food price increases, in particular when the insufficient local production has to be complemented by food imports with volatile prices. Egypt has experienced several “food crises” (the latest in 2008), which put an halt to attempts to reform in depth the system of food subsidies because of social unrest. In this paper, we use a Mixed Demand approach to analyze the consumption structure of Egyptian households. Our model specification takes into consideration the characteristics of the Egyptian food subsidy system, where some food items have predetermined quotas while others are associated with predetermined (subsidized) prices. Price, income and quota elasticities are estimated from the Egyptian family expenditure survey, and welfare change measures are derived by income class. Simulations of various options to eliminate subsidies on selected food items are conducted. We estimate the negative welfare impact of the reforms, especially in the context of increasing food prices, by comparing welfare effects of policy options by income quartiles and by household category (rural, urban).     

Household income,women’s income share and food calorie intake in South Western Nigeria

Current debates on the nature of intra-household preferences and resource control raises the question of how intra-household redistribution of income from men and women compares with increasing total household income as strategies for increasing calorie intake among low income households. I estimate calorie-income and calorie-women’s income share elasticities for a random sample of low income households from the rural areas of south western Nigeria. I find that calorie-income elasticity is positive and small, 0.194, but four times as large as calorie-women’s income share elasticity, suggesting that calorie intake is affected more by total disposable income than by its distribution pattern. Second, I find a small and negative effect of women’s income share on per caput calorie intake, −0.04, which is a rejection of the hypothesis that increases in women’s share of income will increase calorie intake and suggests that intra-household income re-distribution from men to women may not be an effective policy for increasing food calorie intake among households in the study area.     

The new political economy of food and agricultural development

This paper emphasizes the benefits of an agricultural strategy of development in developing countries. It begins by analyzing the close links between food and employment in the development process. In an underdeveloped country, food production is minimal, but demand is as well because of the small population growth. After development begins, income rises and food demand outstrips production. Only at later stages of development can food production meet demand. The middle stage of development describes most developing countries, which have averaged annual growth rates of 3% per capita in 1966-80. The growth in food demand must be met through technological advance in agriculture: high-yield seeds, fertilizers, and irrigation, which, for example, helped India increase cereal yields 29% between 1954-55 and 1964-65. The rate of growth in cropped areas has declined between 1961-1980, making increased yields more necessary. Growth in employment and income leads to higher food demand, which leads to higher prices and labor costs and a tendency towards capital-intensive agriculture. As the rural sector becomes wealthier, there is also more opportunity for non-agricultural rural workers, creating still more demand. In the final development stage, agricultural products can generate foreign exchange. In Asia, the priority is to ensure efficient outcomes of capital allocations, while in Africa, technology must be instituted. Public investment has been shown to be essential to rapid development in Japan, Taiwan, and the Punjab of India. The absence of this investment in Africa, partly because of an overemphasis on urban sector investment, is largely responsible for the backward state of African agriculture. Often rural areas are overtaxed, agricultural experts are lacking, and there is a growing presence of urban bureaucrats. Both experts in the donor community and farmers themselves must become more vocal in demanding investment in the agricultural sector.     

城乡教育发展差距与居民收入差距关系研究

以CGSS2006抽样调查数据为基础,对我国城乡教育发展差距和居民收入差距之间的关系进行了实证分析。研究发现：我国城乡居民收入差距和教育发展差距都十分显著,居民受教育程度与其获得的收入水平之间具有高度的正相关性,此外,“受教育程度”因素已经成为仅次于“有事业心和进取心”因素的影响居民事业成功的第二大关键因素。因此,长期以来我国城乡教育发展上的差距必然是造成我国当前城乡居民收入差距产生和扩大的一个主要原因,要想解决我国城乡居民收入差距问题,必须首先解决城乡教育发展的不均衡性问题。     

Non-farm work and food security among farm households in Northern Ghana

This paper examines the impact of non-farm work on household income and food security among farm households in the Northern Region of Ghana. We analyze the impact by employing propensity score matching method that accounts for self-selection bias. The matching results show that participation in non-farm work exerts a positive and statistically significant effect on household income and food security status, supporting the widely held view that income from non-farm work is crucial to food security and poverty alleviation in rural areas of developing countries.     

Nutrition,agriculture and the global food system in low and middle income countries

The entire food value chain and diet of low and middle income countries (LMICs) are rapidly shifting. Many of the issues addressed by the nutrition community ignore some of the major underlying shifts in purchases of consumer packaged foods and beverages. At the same time, the drivers of the food system at the farm level might be changing. There is a need for the agriculture and nutrition communities to understand these changes and focus on some of their implications for health. This rapid growth of the retail sector will change the diets of the food insecure as much as that of the food secure across rural and urban LMIC’s. This short commentary contents that current research, programs and policies are ignoring these rapid dynamic shifts.     

Weighing what’s practical: proxy means tests for targeting food subsidies in Egypt

Despite achieving a significant cost reduction over the past two decades, the absolute cost of food subsidies in Egypt is still high relative to the benefits received by the poor. There is scope for better targeting these food subsidies, in particular for targeting cooking oil and sugar ration cards, both because reforms in this area are perceived to be far less politically sensitive than adjusting subsidy policy for bread and wheat flour and because higher income groups presently receive a significant percentage of the benefits. Targeting the high-subsidy green ration cards to the poor and the low-subsidy red ration cards to the nonpoor will require identification of both poor and nonpoor households. An International Food Policy Research Institute research team in Egypt, in collaboration with the Egyptian Ministry of Trade and Supply, developed a proxy means test for targeting ration cards. The paper describes the process of moving from the optimal income-predicting model to the final model that was both administratively and politically feasible. An ex-ante evaluation of the levels of accuracy of the proxy means testing model indicates that the model performs quite well in predicting the needy and nonneedy households. An effective and full implementation of this targeting method would increase the equity in the ration card food subsidy system, and, at the same time, the total budgetary costs of rationed food subsidies would decline. Moreover, the experience gained under this reform would facilitate targeting future social interventions to reduce and prevent poverty in Egypt.     

关于强化我国个人所得税收入分配功能的探析

通过对我国现行个人所得税收入分配功能的分析和定位可看出,我国目前贫富差距惊人,城乡收入差距悬殊．从基尼系数分析显示,我国已经步入了国际警戒线,造成这种情况的原因是我国个人所得税不能充分执行其调节收入分配的功能。通过对税收制度方面和税收征收管理方面缺失的研究,显示我国个人所得税收入调节功能存在着严重的缺陷,影响其功能发挥的原因有个人所得税没有体现税负公平的基本原则、个人收入所占的比重较低、调控客体不完全到位等。针对这些影响因素,文章提出了强化我国个人所得税收入分配功能的改革思路．主要是对个人所得税制课税模式、功能定位、税收扣除方式等方面的调整。     

The impact of maize price shocks on household food security: Panel evidence from Tanzania

Using three waves (2008/09, 2010/11, 2012/13) of the Tanzanian National Panel Survey, this study investigates the impact of maize price shocks on household food security. Between 2008/09 and 2012/13, calorie intake stagnated for urban households, yet sharply deteriorated for rural households. The latter was driven by a significant decline in the consumption of the major staple maize which showed strongest price hikes among all major food items. Fixed-effects regressions indicate a clear negative relationship between maize prices and average household energy intake. Almost all population groups were found to be negatively affected by maize price shocks, with rural landless households being the most vulnerable group. In particular, a 50 percent rise in maize prices decreases caloric intake for rural (urban) households on average by 4.4 (5.4) percent, and for rural landless households by 12.6 percent. Results further indicate that subsistence agriculture can act as an effective strategy to insure against food price volatility.     

Towards regional food security in southern Africa: a (new) policy framework for the agricultural sector

In the southern African Region (SAR) large populations, mainly concentrated in rural areas, face food insecurity and poverty. Food insecurity is intensified by adverse weather conditions and droughts which impact negatively on farm level food production throughout the region. Agriculture constitutes an important economic sector in the majority of countries in the region. This is measured as share of agricultural value added to the GDP and as agriculture's share in employment. Based on these facts alone, it must be obvious that sustained agricultural performance will play a significant role in the improvement of food security and livelihoods in the region. However, food security is not only attained in rural areas and by the consumption of home produced food stuffs. Urbanisation is expected to increase dramatically over the next few decades and feeding the urban masses, at affordable prices, must be considered to be a high future priority for governments in the region. Food security must not be viewed as an agricultural issue per se. The drive to food self sufficiency through domestic agriculture production in many countries in the region did not enable these countries to feed their own population. Food security should rather be defined as the acquirement of sufficient and nutritious quantities of food (Sen, 1981, Poverty and Famines: An essay on Entitlement and Deprivation). An approach, whereby attention is given to the macro level availability of food, access to income streams as well as improved production capacity to acquire food at a household level and the utilisation of nutritious food, should therefore be guiding food security policies (SADC: FSTAU, 1997, A Strategic Framework for Food Security in the Region). This broader view emphasises household level poverty reduction, economic development and growth as important components of a food security strategy (World Food Summit, Rome, 1996). An important issue which therefore needs to be explored is whether agriculture does have the potential to contribute to economic processes, which will support broad based development and food security. This paper is intended to argue the importance of agricultural development for food security in the region and to develop a diverse policy framework to strengthen this new, more comprehensive role of agriculture in the region.     

Impact of commuting by workers on household dietary diversity in rural India

Drawing insights from the literature on transformation of rural non-farm employment, pathways from agriculture to nutrition, and linkages between migration and nutritional status of household, we seek to understand differences in dietary diversity across three mutually exclusive types of rural Indian households: where all members work in rural areas, at least one member commutes to urban areas, at least one member has no fixed place of work. Our analysis is based on a nationally representative data set from India for the year 2009–10 and we use propensity score matching methods. We find that as compared to households with no commuters, households with rural–urban commuters have higher dietary diversity; whereas households with no fixed place workers have lower dietary diversity. We also find differences in dietary diversity across households which differ by their primary source of income.     

Do the urban poor face higher food prices? Evidence from Vietnam

Whether there is a poverty penalty, in terms of food prices, is unsettled in the literature after more than four decades of study. Unit values from household surveys suggest that prices vary with income while outlet surveys typically find food prices varying with store type but not with neighborhood income. Most outlet surveys are from rich countries, with just one spatially limited study from a developing country. In this paper we use especially collected food price data from metropolitan areas of Vietnam to test whether the urban poor face higher food prices. Food prices in low-income neighborhoods are 1% lower, on average, than in other neighborhoods. Unit values give a different answer to the question of whether the poor face higher prices and are not suited to answer such a question.     

Urban agriculture,poverty, and food security: Empirical evidence from a sample of developing countries

Urban agriculture may have a role to play in addressing urban food insecurity problems, which are bound to become increasingly important with the secular trend towards the urbanization of poverty and of population in developing regions. Our understanding of the importance, nature and food security implications of urban agriculture is however plagued by a lack of good quality, reliable data. While studies based on survey data do exist for several major cities, much of the evidence is still qualitative if not anecdotal. Using a recently created dataset bringing together comparable, nationally representative household survey data for 15 developing or transition countries, this paper analyzes in a comparative international perspective the importance of urban agriculture for the urban poor and food insecure. Some clear hints do come from our analysis. On the one hand, the potential for urban agriculture to play a substantial role in urban poverty and food insecurity reduction should not be overemphasised, as its share in income and overall agricultural production is often quite limited. On the other hand, though, its role should also not be too easily dismissed, particularly in much of Africa and in all those countries in which agriculture provides a substantial share of income for the urban poor, and for those groups of households to which it constitutes an important source of livelihoods. We also find fairly consistent evidence of a positive statistical association between engagement in urban agriculture and dietary adequacy indicators.     

Resettlement: Zimbabwe's first step

More than a year after independence, the main changes in agriculture in Zimbabwe have been minimum wage legislation, a high maize price accompanied by an exceptionally good growing season, the UNHCR (United Nations High Commission for Refugees) reinstallation and food programmes and the small beginnings of resettlement (and larger numbers of squatters). Certain food subsidies also affect rural areas although their greatest benefits accrue to those with urban incomes and urban diets. In addition the ‘former tribal trust lands’ are subject to increasing politicization as the newly elected district councils flex their muscles, providing at the same time an apparent attempt at decentralization and local participation with greatly increased expectations of assistance from the state. The future is uncertain, but it is evident that while the standard of living for the majority in rural areas remains so starkly low, the government will be forced to contend with sharply polarized forces, both within and outside the state apparatus, that seek to speed or dissipate the rate of change.     

Spatial clustering of rural poverty and food insecurity in Sri Lanka

We mapped poverty, with reference to a nutrition-based poverty line, to analyse its spatial clustering in Sri Lanka. We used the Divisional Secretariat poverty map, derived by combining the principal component analysis and the synthetic small area estimation technique, as the data source. Two statistically significant clusters appear. One cluster indicates that low poverty rural areas cluster around a few low poverty urban areas, where low agricultural employment and better access to roads are key characteristics. The other indicates a cluster of high poverty rural areas, where agriculture is the dominant economic activity, and where spatial clustering is associated with factors influencing agricultural production. Agricultural smallholdings are positively associated with spatial clustering of poor rural areas. In areas where water availability is low, better access to irrigation significantly reduces poverty. Finally, we discuss the use of poverty mapping for effective policy formulation and interventions for alleviating poverty and food insecurity.