Jeffrey Alwang

Productivity and Land Enhancing Technologies in Northern Ethiopia: Health, Public Investments, and Sequential Adoption

The adoption of more efficient farming practices and technologies that enhance agricultural productivity and improve environmental sustainability is instrumental for achieving economic growth, food security and poverty alleviation in sub-Saharan Africa. Our research examines the interaction between public investments, community health, and adoption of productivity and land enhancing technologies by households in the northern Ethiopian state of Tigray. Agricultural technology adoption decisions are modeled as a sequential process where the timing of choices can matter. We find that time spent sick and opportunity costs of caring for sick family members are significant factors in adoption. Sickness, through its impact on household income and labor allocation decisions for healthcare and other activities, significantly reduces the likelihood of technology adoption. Our findings suggest that agencies working to improve agricultural productivity and land resource conservation should consider not only the financial status of potential adopters, but also their related health situation.

Labor Shortages on Small Landholdings in Malawi: Implications for Policy Reforms

Abstract A simple linear programming model of representative smallholder households is used to investigate the sources of relative scarcity of labor and land in Malawi. The paradox of on-farm labor shortages on small landholdings can be explained by the multiple constraints smallholders face. These multiple constraints, including lack of finance, concerns for food security, and others, lead to suboptimal allocations of household resources. In turn, the low returns to labor and land, contribute to household food insecurity and a vicious cycle of poverty. The findings of the paper provide a clear signal to policymakers and research and extension institutions that these constraints are all linked, and addressing one cannot be effective without addressing the others.

Misspecification Testing: A Comprehensive Approach

Misspecification tests of individual assumptions underlying regression models often lead to erroneous conclusions regarding source of misspecification. Monte Carlo experiments demonstrate that a comprehensive set of individual and joint tests reduces the likelihood of such conclusions. A practical testing strategy is proposed and suggestions made regarding its implementation.

Peanut Research and Poverty Reduction: Impacts of Variety Improvement to Control Peanut Viruses in Uganda

A procedure is developed and applied for predicting ex ante impacts of agricultural research on aggregate poverty, using as an example the poverty-reducing impact of peanut research in Uganda. Market-level information on economic surplus changes is combined with a procedure for allocating income changes to individual households. Characteristics of farmers that affect their likelihood of technology adoption are used to create a technology adoption profile. Associated changes in poverty resulting from adoption are computed using poverty indices. Predicted income changes at the household level are aggregated to the market level and reconciled with calculations of economic surplus changes.

Effectiveness of Integrated Pest Management Dissemination Techniques: A Case Study of Potato Farmers in Carchi, Ecuador

Potato farmers in Ecuador rely on chemical inputs to manage pests and optimize yields. Integrated pest management techniques lower production costs, reduce pesticide exposure, and improve long-term agricultural sustainability. Public extension does not, however, exist in Ecuador, and cost-effective means of communicating complex messages to producers are needed. We analyze cost-effectiveness of alternative dissemination methods, including farmer field schools (FFS), field days, pamphlets, and word-of-mouth transmission. Field days and pamphlets have strong impacts on adoption, especially considering their low costs. FFS are effective, but expensive. Evidence also indicates significant diffusion from FFS to non-FFS farmers, indicating high complementarity across methods.

Determinants of Food Stamp Program Exits

This article examines factors that influence Food Stamp Program exits and finds that families who leave the Temporary Assistance to Needy Families (TANF) program are also more likely to leave the Food Stamp Program. However, the influence of TANF departure is smaller in states with large TANF caseload declines. The results also suggest that many families leaving the Food Stamp Program are still eligible for benefits. These families may have poor information on food stamps eligibility in the face of TANF departure or may view Food Stamp Program reauthorization procedures as too costly relative to program benefits.

Seeking Guidelines for Poverty Reduction in Rural Zambia

Abstract Poverty profiles typically provide policy makers with information about the characteristics of the poor without giving guidance as to the types of programs best suited for reducing poverty. A method is described in this paper for extending the typical poverty profile to analyze and quantify the constraints faced by poor smallholders in rural areas. The method is applied to rural Zambia, where poverty is widespread and deep. The extension provides timely information for the design of poverty-reducing policies.

Why Has Poverty Increased in Zimbabwe

Poverty in Zimbabwe increased significantly during the 1990s, and it increased in all sectors of the economy. In the middle of the decade, more than 60 percent of Zimbabwean households fell below the national poverty line. There are competing reasons for this: some say it was the result of the government instituting the Economic Structural Adjustment Program (ESAP), and others say that ESAPs effectiveness was hampered by recurring drought. This document sheds light on the sources of the increase in Zimbabwean poverty, with the use of non-parametric, and parametric statistical methods. These techniques support the conclusion that the drought, though harmful, does not entirely explain the increase in poverty. The deteriorating economic environment, reducing the returns to both human, and physical assets, also had profound effects on household well-being. What are the prospects for improvement in the near future? Only serious structural changes to the economy can create labor market conditions, conducive to long-term, broad-based growth.

Changes in poverty in Zimbabwe between 1990 and 1996: Worsening outcomes under adverse conditions

The article examines changes in poverty and sources of change in Zimbabwe between 1990 and 1996. Comparable national survey data are used for both periods. Findings indicate that levels of wellbeing and poverty worsened during the period, although there is some evidence that inequality is lower in the latter year. Rural poverty is more prevalent, severe and deeper than that in urban areas, but urban poverty grew dramatically during the period. Much of the growth of urban poverty is associated with economic restructuring and the failure of the urban economy to produce high-quality jobs. While the educational attainment of the urban population grew during the 1990s, secondary and higher levels of education were no longer a guarantee of escape from poverty in 1995/6. In rural areas, all land-use types exhibited an increase in poverty; these findings are robust to the welfare measure chosen.

Measuring the Benefits of Policy Research

Public decision makers increasingly request information on the impacts of agricultural research. Economists have made important contributions to our understanding of such impacts, but seldom have they quantitatively evaluated the effects of social science, particularly policy research. This paper addresses important issues associated with policy research (PR) evaluation. It discusses alternative PR evaluation approaches, suggests what appears to be the most practical method, and provides a brief example.