贫困地区农户对自然灾害风险规避和响应分析

[目的]研究影响贫困地区农户应对自然灾害风险,减少经济损失的因素,并分析农户采取应对损失的措施。[方法]利用2015年云南、贵州和陕西3省6县经历过自然灾害的819农户作为研究对象。采用Logit模型研究影响贫困地区农户有效规避自然灾害风险的因素,并进一步分析农户在遭受自然灾害后采取的响应策略。[结果]研究表明农户户主的受教育程度越高、与外界市场接触越紧密,则农户规避自然灾害风险能力越强;农户收入中农业收入比重高、家庭贫穷、家庭收入来源过于集中均不利于农户规避自然灾害风险。通过分析农户应对自然灾害损失的策略发现,农户在自然灾害冲击下,较多采用被动的应对策略,不善于拓展新的收入来源。采用降低生活质量、减少生活必要支出、寻找新的收入来源、金融手段和出售生产生活资料这5种应对策略的农户分别占整体受灾农户的16.36%、6.47%、14.65%、5.37%、4.03%和11.35%。[结论]为了增强贫困地区农户规避自然灾害风险的能力,首先需要加大对贫困地区的教育投资;其次,增加贫困地区与外界沟通交流的渠道,可以在偏远地区多修公路等;最后,应当积极引导农户拓展农业生产以外的收入来源,将收入来源多样化,降低农户农业收入在家庭收入中的比重,有效增强贫困地区农户应对自然灾害风险的能力。     

重庆市土地租赁户农作物选择机制及其对粮食安全的威胁

研究目的：通过对重庆市自耕模式和土地流转模式下主要农作物收益和成本进行比较分析,揭示土地流转成本—收益胁迫下农户农作物选择及其对粮食安全的威胁。研究方法：成本收益分析。研究结果：在区位条件好的地方,土地租金占农户现金成本的比例高达61.77%;土地流转成本—收益胁迫下,农户最优选择是种植收益率更高的马铃薯、茄子和萝卜等蔬菜作物,压缩稻谷、玉米等粮食作物;土地租金压力测试表明蔬菜作物可承受压力远大于粮食作物,这使得粮食作物缺乏竞争力;土地流转增多将减少粮食作物种植比重,并威胁地区粮食安全。研究结论：为保障粮食安全,建议地方政府应根据各种农作物的成本收益对粮食作物种植大户提供政策补贴,通过农业保险等市场化手段解决经济作物种植风险。     

A review of the economic impact of malaria in agricultural development

This paper surveys the linkages between malaria and agriculture, focusing on the economic impacts of the disease. We adopt Negin's (2005) conceptual framework to examine the potential impacts of malaria in the agricultural sector, including both direct and indirect impacts. In addition to health care costs, malaria causes loss of agricultural labor and slows adoption of improved practices in agriculture. Furthermore, some agricultural practices and development interventions are known to facilitate the spread of malaria, exacerbating its impacts. Given the importance of both agriculture and malaria in developing countries, especially in Africa, the interaction between them could be a significant factor in economic growth. The review identifies gaps in past research on this topic. A better understanding of malaria's impact on agricultural productivity, coupled with efforts to strengthen capacity to deal with malaria, would enhance policies and programs aimed at combating malaria and curbing its impacts on agricultural productivity.     

我国深度贫困地区的减贫成就与挑战——以新疆X县为例

[目的]深度贫困地区是我国"脱贫攻坚"的硬骨头,但是鲜有研究对该地区的精准扶贫成效及未来挑战开展定量分析。[方法]文章以新疆典型县域(X县)为例,描述分析了该县贫困发生率,贫困家庭的收入、住房和饮水情况,脱贫方式,特殊群体的贫困特征以及致贫原因随时间的变化趋势。[结果]基于2013—2018年建档立卡贫困户信息,该县农村贫困发生率从2013年的37.2%下降到2018年的0.2%;贫困户人均收入从2 431元提高到11 281元;贫困农户的住房、饮水和医保等问题大多能在2年之内解决;大量青壮年和高学历人群依赖"政策脱贫";因病和因残致贫、老年贫困问题和因学致贫具有一定的普遍性。[结论]不返贫是可持续扶贫的最终目标。首先,逐步改善"财政兜底、一兜了之"的帮扶方式;其次,加强对特殊人群(例如,老年人口、高抚养比家庭等)的识别和帮扶力度;再次,消除因学致贫的可能性,同时为适龄劳动力提供有效的技能培训。     

林业社会化服务供给对贫困农户林地投入产出影响分析

基于江西省700户用材林农户调查数据,采用回归模型定量分析林业社会化服务供给对不同贫困程度农户林地投入和产出的影响程度和影响方向,以验证林权配套改革中的社会化服务供给是否发挥应有的效果。结果表明:林木栽培技术服务对一般贫困农户林地投入和林地产出水平具有显著正向影响;金融服务对非贫困农户和重度贫困农户林地投入水平具有显著正向影响;病虫害防治等服务对非贫困农户和一般贫困农户林地投入有显著负向影响;林地面积对不同农户林地投入产出具有显著的负向影响;是否参加林地保险对重度贫困农户林地投入有显著正向影响;劳动力人数对非贫困农户林地投入有显著正向影响;家庭收入结构对不同农户林地投入产出具有显著正向影响;户主年龄对非贫困农户和一般贫困农户林地投入有显著正向影响。因此,提出针对贫困农户提供林业技术培训;加大对贫困农户林业金融扶贫力度;加大林业社会化服务体系建设的财政投入力度等对策建议。     

Mobile Phones and Radios: Effects on Transactions Costs and Market Participation for Households in Northern Ghana

The literature on agricultural markets suggests that transactions costs are the main obstacles preventing households from participating in agricultural markets. We examine the impact of the recent massive penetration of information communication technologies (ICTs), particularly mobile phones and radios, in developing countries to investigate the role of information in economic transactions and participation in food crop markets. To fully capture market participation behaviours, the current theoretical framework on market participation and transactions costs is extended to include those households that sell and buy in the same time period. We correct for endogeneity and selectivity throughout our models. We used a novel dataset of 393 households in northern Ghana with detailed information on market transactions and ICTs usage. Results show that receiving market information via mobile phones has a positive and significant impact on market participation, with a greater impact for households with a surplus of food crops. We find that radios have a larger impact on the quantity traded. This may reflect the nature of mobile phones in reducing searching costs, whereas radios provide an updated and regular flow of information which affects the pattern of crops consumed and sold. We also emphasise that the most significant factor is how ICTs are used, rather than their ownership.     

Returns to spending on agricultural extension: the case of the National Agricultural Advisory Services (NAADS) program of Uganda†

The aim of this paper is to assess the direct and indirect impacts of the agricultural extension system of Uganda, the National Agricultural Advisory Services (NAADS) program, on household agricultural income. Data from two rounds of surveys of Ugandan rural farm‐households conducted in 2004 and 2007, as well as different program evaluation methods and model specifications, are used to estimate impacts and compute a rate of return. The direct and indirect impact of the program is estimated at 37–95% and 27–55% increase in per capita agricultural gross revenue between 2004 and 2007 for households participating directly and indirectly in the program, respectively, compared to nonparticipants. The rate of return on the program's expenditures is estimated at 8–49%. The program has been relatively more effective among male‐headed, larger, and asset‐poor households, as well as those taking up noncrop high‐value enterprises and living further away from financial services, all‐weather roads, and markets or located in the Eastern and Northern Regions. Policy implications of the results are drawn.     

How would global trade liberalization affect rural and regional incomes in Australia?

Agricultural protection in rich countries, which had depressed Australian farm incomes via its impact on Australia’s terms of trade, has diminished over the past two decades. So too has agricultural export taxation in poor countries, which has had the opposite impact on those terms of trade. Meanwhile, however, import protection for developing country farmers has been steadily growing. To what extent are Australian farmers and rural regions still adversely affected by farm and non‐farm price‐ and trade‐distortive policies abroad? This paper draws on new estimates of the current extent of those domestic and foreign distortions: first, to model their net impact on Australia’s terms of trade (using the World Bank’s Linkage model of the global economy); and second, to model the effects of that terms of trade impact on output and real incomes in rural versus urban and other regions and households within Australia as of 2004 (using Monash’s multi‐regional TERM model of the Australian economy).     

The impact of food inflation on urban poverty and its monetary cost: some back‐of‐the‐envelope calculations

This article uses a sample of 72 developing countries to estimate the change in the cost of alleviating urban poverty brought about by the recent increase in food prices. This cost is approximated by the change in the poverty deficit (PD), that is, the variation in financial resources required to eliminate poverty under perfect targeting. The results show that, for most countries, the cost represents less than 0.2% of gross domestic product. However, in the most severely affected, it may exceed 3%. In all countries, the change in the PD is mostly due to the negative real income effect of those households that were poor before the price shock, while the cost attributable to new households falling into poverty is negligible. Thus, in countries where transfer mechanisms with effective targeting already exist, the most cost‐effective strategy would be to scale up such programs rather than designing tools to identify the new poor.     

Impact of Ghana's agricultural mechanization services center program

Use of mechanization in African agriculture has returned strongly to the development agenda, particularly following the recent high food prices crisis. Many developing country governments—including Ghana, the case study of this article—have resumed support for agricultural mechanization, typically in the form of subsidies for tractor purchase and establishment of private‐sector‐run agricultural mechanization service centers (AMSECs). The aim of this article is to assess the impact of Ghana's AMSEC program on various farm household outcomes, using data from surveys that were conducted with 270 farm households. A two‐stage propensity score matching and difference‐in‐difference estimation procedure is used to estimate the impacts of the program, employing different definitions of treatment, model specifications, and matching algorithms to assess sensitivity of the estimator to different assumptions. The results indicate that the AMSEC program has had a mixed impact on different outcome indicators. For example, whereas the program has contributed to improving availability of mechanization services, reducing drudgery, and raising yield, it has had no impact on the change in the prices paid by farmers for the services used and the change in the amount of area plowed. Implications of the results on labor‐mechanization substitution and for raising and sustaining productivity further are drawn.     

Chinese land policies and farmers’ adoption of organic fertilizer for saline soils

Soil salinization has become a global concern and poses a great threat to food production and sustainable land use. Land use policies are the main driver of saline soil farmland use in ecosystems. This paper proposes a theoretical framework for analyzing how saline soil farmland use is affected by land use practices of individual farm households. An empirical study, using an ordered probit model, was conducted based on questionnaire responses from farm households in 8 towns and 14 villages in eco-fragile areas in Shandong, Jilin and Xinjiang provinces. The results suggest that land tenure, state systems agricultural support, characteristics of a field parcel and characteristics of the farm households have different influences on farmer's land use in three regions. The adoption of organic fertilizer by individual households is constrained by the lack of stability and integrity in land tenure. Furthermore, the parcel of a field is generally small, sparsely distributed and often fragmented, which increases costs. Even subsidizing organic fertilizer does not necessarily help in its adoption. Given these challenges, this study makes recommendations for different regions that may promote the adoption of improved saline soil farmland cultivation methods by farmers.     

贫困地区农业结构调整对农民收入的影响——重庆五区县实证分析

本文利用重庆贫困地区5个区县619户农户实地调查资料,着重从农产品商品率和现金收入的变化,分析了农业结构调整对贫困地区农户人均纯收入的影响。同时探讨了农业结构调整对农户增收的影响因素。经过计算和分析认为:农民人均纯收入的变化中,贡献率最大的是外出打工等工资性收入,农业纯收入增量的贡献率不到1/3。且农业纯收入增量中,由于商品率提高带来的现金收入增量也不到一半。因此可以说,农业结构调整对农户收入的提高产生了一定影响,但作用有限。另外,农村基础设施建设,如道路、电力通讯等设施建设是影响农业结构调整对农民增收作用的重要因素。     

农民合作社减贫的农户收入效应及其异质性——基于内生转换回归模型的实证分析

[目的]农民合作社具有“天然的”益贫特征，在精准扶贫时期发挥了重要作用，研究合作社减贫的农户收入效应及其异质性对于完善和优化合作社产业减贫政策，健全贫困治理长效机制，助力乡村振兴具有重要的现实意义。[方法]文章基于2018年云南、贵州、陕西和甘肃4省欠发达地区1 551份农户的调研数据，利用内生转换回归模型（ESRM），通过构建“反事实”分析框架，实证分析了合作社对农户所产生的收入效应及其异质性特征。[结果]（1）与未入社的农户相比，入社为其家庭总收入带来了约32.26%的收入增幅。合作社对非贫困农户、高收入分位数农户、中青年农户的减贫增收作用最明显。（2）除了对贫困农户财政性收入影响不显著外，合作社对不同贫困属性农户其他不同来源的收入均有提高，对贫困农户的农业经营性收入影响最明显，对非贫困农户的财产性收入影响最明显。（3）土地面积、生产性资产值、人情往来支出、户主受教育年限、是否参加专业培训、建档立卡户、是否有合作社、主要地理环境均显著正向影响农户入社决策；学生数量显著负向影响农户入社决策。[结论]在积极培育和发展合作社，鼓励合作社由“重数量轻质量、重服务轻规范”向高质量发展转型的同...     

农机社会化服务对农业劳动生产率的影响研究

[目的]农业劳动生产率的提高是中国农业现代化的重要特征,进一步探讨农机社会化服务对农业劳动生产率的作用效果具有现实意义。[方法]文章基于2019年全国13省份玉米种植户调查数据,采用OLS回归模型与倾向得分匹配法,分析了农机社会化服务对农业劳动生产率的影响效应,探讨影响效应在不同地形条件、兼业程度的组群差异,并考察了不同环节农机社会化服务对农业劳动生产率的影响差异。[结果]（1）农机社会化服务正向显著影响农业劳动生产率,采纳农机社会化服务会促使农户农业劳动生产率显著提高18.8%。但农户采纳农机社会化服务的作用效果具有环节异质性。采纳耕整地、播种、灌溉排水和收获环节农机社会化服务会促使农户农业劳动生产率分别显著提高21.2%、17.4%、22.9%和18.3%;(2)而农户采纳植保环节农机社会化服务对农业劳动生产率并不具有显著影响。农户采纳农机社会化服务对劳动生产率的影响效应还存在禀赋差异,平地农户采纳农机社会化服务使其农业劳动生产率显著提高21.9%,而坡地山地农户采纳农机社会化服务对农业劳动生产率没有表现出显著的影响。（3）纯农业户与兼业农户采纳农机社会化服务都会对农业劳动生产率产...     

Rising Food Prices and Household Welfare: Evidence from Brazil in 2008

Food price inflation in Brazil in the 12 months to June 2008 was 18%, whereas overall inflation was 7%. Using spatially disaggregated monthly data on consumer prices and two different household surveys, we estimate the welfare consequences of these food price increases, and their distribution across households. Because Brazil is a large food producer, with a predominantly wage‐earning agricultural labour force, our estimates include general equilibrium effects on market and transfer incomes, as well as the standard estimates of changes in consumer surplus. Although the expenditure (or consumer surplus) effects were large, negative and markedly regressive everywhere, estimates of the market‐income effect were positive and progressive, particularly in rural areas. Because of this effect on the rural poor, and of the partial protection afforded by increases in two large social assistance benefits, the overall impact of higher food prices in Brazil was U‐shaped, with middle‐income groups suffering larger proportional losses than the very poor. Nevertheless, as Brazil is 80% urban, higher food prices still led to a greater incidence and depth of poverty at the national level.     

乡村振兴林农参与碳汇项目意愿研究

基于2016年福建省林权改革监测调研数据,利用二元Logistic模型,分析影响福建省欠发达山区林农参与碳汇林生产经营意愿的因素;贫困户与非贫困户对碳汇林项目经营意愿是否有差异及产生差异的原因。结果表明:贫困户与非贫困户对于碳汇林项目的响应程度有一定的区别,对于全体受访对象和非贫困户,是否参加过碳汇林生产培训、家庭林地面积、家庭林业总收入对提高其参与林业碳汇项目的意愿有显著的促进作用,而木材采伐销售收入反向影响其参与林业碳汇项目的意愿;对于贫困户,是否参加过碳汇林生产培训显著影响其参与林业碳汇项目经营的意愿。因此,提高贫困户和非贫困户的碳汇林经营意愿应各有侧重,在政策的制定上应给予贫困户一定的倾斜,调动贫困户的经营积极性,拓宽收入渠道,最终实现精准扶贫。     

The economics of land fragmentation in the north of Vietnam*

Land fragmentation, where a single farm has a number of parcels of land, is a common feature of agriculture in many countries, especially in developing countries. In Vietnam, land fragmentation is common, especially in the north. For the whole country, there are about 75 million parcels of land, an average of seven to eight plots per farm household. Such fragmentation can be seen to have negative and positive benefits for farm households and the community generally. Comparative statics analysis and analysis of survey data have led to the conclusion that small‐sized farms are likely to be more fragmented, and that fragmentation had a negative impact on crop productivity and increased family labour use and other money expenses. Policies which allow the appropriate opportunity cost of labour to be reflected at the farm level may provide appropriate incentives to trigger farm size change and land consolidation. Policies which tip the benefits in favour of fewer and larger plots, such as strong and effective research and development, an active extension system and strong administrative management, may also lead to land consolidation.     

Rural nonfarm activities and agricultural crop production in Nigeria

Although most rural households are involved in the farm sector, the nonfarm sector has grown significantly in recent decades, and its role in rural development has become increasingly important. This article examines the effect of participation in nonfarm activities on crop expenses of farm households in Nigeria. The relationship is modeled using a nonseparable agricultural household model that suggests that participating in nonfarm activities can relax the credit constraints facing farm households and reduce risk thereby helping households improve farm production and smooth consumption over time. The results show that participation in nonfarm activities by Nigerian farmers has a positive and significant effect on crop expenses and in particular on payments for hired labor and inorganic fertilizers. Separate analysis of the six geopolitical zones in Nigeria indicates that it is in the South-South and South-East zones where nonfarm participation appears to induce more hiring of labor. The results support the hypothesis that nonfarm participation helps relax liquidity constraints but suggests how that liquidity is used is zone-specific. In general, the results also indicate that liquidity is used more to pay for inputs into staple production as opposed to cash crops.     

退耕还林工程对西部农户收入的影响:对西安周至县南部山区乡镇农户的实证分析

研究目的:分析研究退耕还林工程对西部山区农户收入的影响和作用。研究方法:利用西安交通大学人口与发展研究所2008年4月在周至南部山区的农户生计调查数据,建立统计回归模型,分别采用多元线性和分位数回归分析方法,定量分析退耕还林工程对西部山区农户收入的影响。研究结果:参与退耕还林对农户家庭纯收入有着显著的正向影响,尤其是对于中低收入农户,但参与退耕通过户耕地面积和农业劳动时间变化对中低水平的农户收入也仍有一定的负面作用。研究结论:为巩固退耕工程成果,当地政府应提供信息,提高农户的社会资本,积极发展外出务工等非农生产活动。     

Gender and the dynamics of technology adoption: Empirical evidence from a household-level panel data

Very few empirical studies account for the dynamic nature of the agricultural technology adoption decision and none of these explores if this dynamic nature depends on the gender of the decision maker. Using four waves of a household-level Ugandan panel data, this is the first empirical analysis to account for self-learning (one's own adoption experience) in explaining current adoption decision in a developing country context, and the first to study the interaction between self-learning and gender. Technology adoption is defined as adoption of hybrid seed, inorganic fertilizer, or pesticides. Our results indicate that the dynamic panel data Probit model is superior to its static counterpart in the sense that self-learning, captured by lagged technology adoption indicators, is by far the most important determinant of technology adoption. We also find a weaker impact of self-learning for female-headed households than male-headed households. Female-headed households face fewer learning opportunities, which produce a lower self-learning impact in later periods, further exacerbating the gap in technology adoption among male- and female-headed households.