Publication: An Empirical Economic Assessment of Impacts of Climate Change on Agriculture in Zambia
Loading...
Date
2007-07
ISSN
Published
2007-07
Author(s)
Editor(s)
Abstract
This report assesses the economic impacts of climate change on agriculture in Zambia, using the Ricardian method. A multiple linear regression model with net revenue per hectare as response variable has been fitted with climate, hydrological, soil, and socioeconomic variables as explanatory variables. There is one main cropping season in Zambia, lasting from November to April. Crop production in this period depends solely on rains. Considering crop progression in three stages-germination, growing, and maturing, which require different amounts of water and temperature-the climate variables included in the model are long-term averages of the temperature and wetness index for the periods November to December, January to February, and March to April. Assuming a nonlinear relationship of farm revenue with the climate variables, quadratic terms for climate variables were also included in the model. The results indicate that most socioeconomic variables are not significant, whereas some climate variables and the corresponding quadratic variables are significant in the model. Further findings are that an increase in the November-December mean temperature and a decrease in the January-February mean rainfall have negative impacts on net farm revenue, whereas an increase in the January-February mean temperature and mean annual runoff has a positive impact.
Link to Data Set
Citation
“Jain, Suman. 2007. An Empirical Economic Assessment of Impacts of Climate Change on Agriculture in Zambia. Policy Research Working Paper; No. 4291. © World Bank. http://hdl.handle.net/10986/7478 License: CC BY 3.0 IGO.”
Associated URLs
Associated content
Other publications in this report series
Publication The Future of Poverty(Washington, DC: World Bank, 2025-07-15)Climate change is increasingly acknowledged as a critical issue with far-reaching socioeconomic implications that extend well beyond environmental concerns. Among the most pressing challenges is its impact on global poverty. This paper projects the potential impacts of unmitigated climate change on global poverty rates between 2023 and 2050. Building on a study that provided a detailed analysis of how temperature changes affect economic productivity, this paper integrates those findings with binned data from 217 countries, sourced from the World Bank’s Poverty and Inequality Platform. By simulating poverty rates and the number of poor under two climate change scenarios, the paper uncovers some alarming trends. One of the primary findings is that the number of people living in extreme poverty worldwide could be nearly doubled due to climate change. In all scenarios, Sub-Saharan Africa is projected to bear the brunt, contributing the largest number of poor people, with estimates ranging between 40.5 million and 73.5 million by 2050. Another significant finding is the disproportionate impact of inequality on poverty. Even small increases in inequality can lead to substantial rises in poverty levels. For instance, if every country’s Gini coefficient increases by just 1 percent between 2022 and 2050, an additional 8.8 million people could be pushed below the international poverty line by 2050. In a more extreme scenario, where every country’s Gini coefficient increases by 10 percent between 2022 and 2050, the number of people falling into poverty could rise by an additional 148.8 million relative to the baseline scenario. These findings underscore the urgent need for comprehensive climate policies that not only mitigate environmental impacts but also address socioeconomic vulnerabilities.Publication Exports, Labor Markets, and the Environment(Washington, DC: World Bank, 2025-07-14)What is the environmental impact of exports? Focusing on 2000–20, this paper combines customs, administrative, and census microdata to estimate employment elasticities with respect to exports. The findings show that municipalities that faced increased exports experienced faster growth in formal employment. The elasticities were 0.25 on impact, peaked at 0.4, and remained positive and significant even 10 years after the shock, pointing to a long and protracted labor market adjustment. In the long run, informal employment responds negatively to export shocks. Using a granular taxonomy for economic activities based on their environmental impact, the paper documents that environmentally risky activities have a larger share of employment than environmentally sustainable ones, and that the relationship between these activities and exports is nuanced. Over the short run, environmentally risky employment responds more strongly to exports relative to environmentally sustainable employment. However, over the long run, this pattern reverses, as the impact of exports on environmentally sustainable employment is more persistent.Publication The Macroeconomic Implications of Climate Change Impacts and Adaptation Options(Washington, DC: World Bank, 2025-05-29)Estimating the macroeconomic implications of climate change impacts and adaptation options is a topic of intense research. This paper presents a framework in the World Bank's macrostructural model to assess climate-related damages. This approach has been used in many Country Climate and Development Reports, a World Bank diagnostic that identifies priorities to ensure continued development in spite of climate change and climate policy objectives. The methodology captures a set of impact channels through which climate change affects the economy by (1) connecting a set of biophysical models to the macroeconomic model and (2) exploring a set of development and climate scenarios. The paper summarizes the results for five countries, highlighting the sources and magnitudes of their vulnerability --- with estimated gross domestic product losses in 2050 exceeding 10 percent of gross domestic product in some countries and scenarios, although only a small set of impact channels is included. The paper also presents estimates of the macroeconomic gains from sector-level adaptation interventions, considering their upfront costs and avoided climate impacts and finding significant net gross domestic product gains from adaptation opportunities identified in the Country Climate and Development Reports. Finally, the paper discusses the limits of current modeling approaches, and their complementarity with empirical approaches based on historical data series. The integrated modeling approach proposed in this paper can inform policymakers as they make proactive decisions on climate change adaptation and resilience.Publication The Asymmetric Bank Distress Amplifier of Recessions(Washington, DC: World Bank, 2025-07-11)One defining feature of financial crises, evident in U.S. and international data, is asymmetric bank distress—concentrated losses on a subset of banks. This paper proposes a model in which shocks to borrowers’ productivity dispersion lead to asymmetric bank losses. The framework exhibits a “bank distress amplifier,” exacerbating economic downturns by causing costly bank failures and raising uncertainty about the solvency of banks, thereby pushing banks to deleverage. Quantitative analysis shows that the bank distress amplifier doubles investment decline and increases the spread by 2.5 times during the Great Recession compared to a standard financial accelerator model. The mechanism helps explain how a seemingly small shock can sometimes trigger a large crisis.Publication Impact of Heat Waves on Learning Outcomes and the Role of Conditional Cash Transfers(Washington, DC: World Bank, 2025-07-14)This paper evaluates the impact of higher temperatures on learning outcomes in Peru. The results suggest that 1 degree above 20°C is equivalent to 7 and 6 percent of a standard deviation of what a student learns in a year for math and reading tests, respectively. These results hold true when the main specification is changed, splitting the sample, collapsing the data at school level, and using other climate specifications. The paper aims to improve understanding of how to deal with the impacts of climate change on learning outcomes in developing countries. The evidence suggests that conditional cash transfer programs can mitigate the negative effects of higher temperatures on students’ learning outcomes in math and reading.
Journal
Journal Volume
Journal Issue
Collections
Related items
Showing items related by metadata.
Publication The Economic Impact of Climate Change on Kenyan Crop Agriculture : A Ricardian Approach(World Bank, Washington, DC, 2007-08)This paper measures the economic impact of climate on crops in Kenya. The analysis is based on cross-sectional climate, hydrological, soil, and household level data for a sample of 816 households, and uses a seasonal Ricardian model. Estimated marginal impacts of climate variables suggest that global warming is harmful for agricultural productivity and that changes in temperature are much more important than changes in precipitation. This result is confirmed by the predicted impact of various climate change scenarios on agriculture. The results further confirm that the temperature component of global warming is much more important than precipitation. The authors analyze farmers' perceptions of climate variations and their adaptation to these, and also constraints on adaptation mechanisms. The results suggest that farmers in Kenya are aware of short-term climate change, that most of them have noticed an increase in temperatures, and that some have taken adaptive measures.Publication Measuring the Economic Impact of Climate Change on Ethiopian Agriculture : Ricardian Approach(World Bank, Washington, DC, 2007-09)This study uses the Ricardian approach to analyze the impact of climate change on Ethiopian agriculture and to describe farmer adaptations to varying environmental factors. The study analyzes data from 11 of the country's 18 agro-ecological zones, representing more than 74 percent of the country, and survey of 1,000 farmers from 50 districts. Regressing of net revenue on climate, household, and soil variables show that these variables have a significant impact on the farmers' net revenue per hectare.The study carries out a marginal impact analysis of increasing temperature and changing precipitation across the four seasons. In addition, it examines the impact of uniform climate scenarios on farmers' net revenue per hectare. Additionally, it analyzes the net revenue impact of predicted climate scenarios from three models for the years 2050 and 2100. In general, the results indicate that increasing temperature and decreasing precipitation are both damaging to Ethiopian agriculture. Although the analysis did not incorporate the carbon fertilization effect, the role of technology, or the change in prices for the future, significant information for policy-making can be extracted.Publication Reducing the Vulnerability of Moldova's Agricultural Systems to Climate Change : Impact Assessment and Adaptation Options(Washington, DC: World Bank, 2013-10-03)Changes in climate and their impact on agricultural systems and rural economies are already evident throughout Europe and Central Asia (ECA). Adaptation measures now in use in Moldova, largely piecemeal efforts, will be insufficient to prevent impacts on agricultural production over the coming decades. There is growing interest at country and development partner levels to have a better understanding of the exposure, sensitivities, and impacts of climate change at farm level, and to develop and prioritize adaptation measures to mitigate the adverse consequences. The approach of this volume is predicated on strong country ownership and participation, and is defined by its emphasis on 'win-win' or 'no regrets' solutions to the multiple challenges posed by climate change for the farmers of Eastern Europe and Central Asia. The solutions are measures that increase resilience to future climate change, boost current productivity despite the greater climate variability already occurring, and limit greenhouse gas emissions-also known as 'climate-smart agriculture.' Specifically, this report provides a menu of climate change adaptation options for the agriculture and water resources sectors, along with specific recommendations that are tailored to three distinct Agro-Ecological Zones (AEZs) within Moldova. This menu reflects the results of three inter-related activities, conducted jointly by the team and local partners: 1) quantitative economic modeling of baseline conditions and the effects of climate change and an array of adaptation options; 2) qualitative analysis conducted by the expert team of agronomists, crop modelers, and water resources experts; and 3) input from a series of participatory workshops for national decision makers and farmers in each of the AEZs. This report provides a summary of the methods, data, results, and adaptation options for each of these activities.Publication Assessment of the Economic Impacts of Climate Change on Agriculture in Zimbabwe : A Ricardian Approach(World Bank, Washington, DC, 2007-07)This study uses the Ricardian approach to examine the economic impact of climate change on agriculture in Zimbabwe. Net farm revenue is regressed against various climate, soil, hydrological and socio-economic variables to help determine the factors that influence variability in net farm revenues. The study is based on data from a survey of 700 smallholder farming households interviewed across the country. The empirical results show that climatic variables (temperature and precipitation) have significant effects on net farm revenues in Zimbabwe. In addition to the analysis of all farms, the study also analyzes the effects on dryland farms and farms with irrigation. The analysis indicates that net farm revenues are affected negatively by increases in temperature and positively by increases in precipitation. The results from sensitivity analysis suggest that agricultural production in Zimbabwe's smallholder farming system is significantly constrained by climatic factors (high temperature and low rainfall). The elasticity results show that the changes in net revenue are high for dryland farming compared to farms with irrigation. The results show that farms with irrigation are more resistant to changes in climate, indicating that irrigation is an important adaptation option to help reduce the impact of further changes in climate. An overview of farmer adaptation to changing climate indicates that farmers are already using some adaptation strategies-such as dry and early planting, growing drought resistant crops, changing planting dates, and using irrigation-to cushion themselves against further anticipated adverse climatic conditions. An important policy message from the empirical findings is that there is a need to provide adequate extension information services to ensure that farmers receive up-to-date information about rainfall patterns in the forthcoming season so that they make well-informed decisions on their planting dates. Policies that increase farmer training and access to credit and aid facilities and help farmers acquire livestock and other important farm assets can help improve net farm performance. Ensuring the availability and accessibility of fertilizers and crop seeds before the onset of the next cropping season can also significantly improve net farm performance across households.Publication Economics of Adaptation to Climate Change : Vietnam(Washington, DC, 2010)This report provides a synthesis of key findings of sector studies undertaken in Vietnam in the context of the EACC study. The sector studies were on agriculture (Zhu & Guo 2010), a separate computable general equilibrium [CGE] analysisbased on agriculture findings (Adams et al. 2010), aquaculture (Kam et al. 2010), forestry (Phuong). At the global level, the EACC study estimates that it will costbetween $70 and $100 billion each year to adapt to climate change over the period 2010 to 2050. The study was funded by the governments of the UnitedKingdom, Netherlands, and Switzerland. Further details may be found at: www.worldbank.org/eacc. In addition, the synthesis report from Vietnam and the six underlying national sector reports can be downloaded from the Environment site of the World Bank s web site for Vietnam: www.worldbank.org/vn/environment.et al. 2010, Almeida et al. 2010), social (McElwee et al. 2010), and coastal ports (VIMARU 2010). Further details can be found in the individual sector reports prepared by teams of national and international experts.
Users also downloaded
Showing related downloaded files
Publication State and Trends of Carbon Pricing 2024(Washington, DC: World Bank, 2024-05-21)This report provides an up-to-date overview of existing and emerging carbon pricing instruments around the world, including international, national, and subnational initiatives. It also investigates trends surrounding the development and implementation of carbon pricing instruments and some of the drivers seen over the past year. Specifically, this report covers carbon taxes, emissions trading systems (ETSs), and crediting mechanisms. Key topics covered in the 2024 report include uptake of ETSs and carbon taxes in low- and middle- income economies, sectoral coverage of ETSs and carbon taxes, and the use of crediting mechanisms as part of the policy mix.Publication Entrepreneurship Education and Training Programs around the World : Dimensions for Success(Washington, DC: World Bank, 2014-04-23)Entrepreneurship has attracted global interest for its potential to catalyze economic and social development. Research suggesting that certain entrepreneurial mindsets and skills can be learned has given rise to the field of entrepreneurship education and training (EET). Despite the growth of EET, global knowledge about these programs and their impact remains thin. In response, this study surveys the available literature and program evaluations to propose a Conceptual Framework for understanding the EET program landscape. The study finds that EET today consists of a heterogeneous mix of programs that can be broken into two groups: entrepreneurship education and entrepreneurship training. These programs target a range of participants: secondary and post-secondary education students, as well as potential and practicing entrepreneurs. The outcomes measured by program evaluations are equally diverse but generally fall under the domains of entrepreneurial mindsets and capabilities, entrepreneurial status, and entrepreneurial performance. The dimensions of EET programs vary according the particular target group. Programs targeting secondary education students focus on the development of foundational skills linked to entrepreneurship, while post-secondary education programs emphasize skills related to strategic business planning. Programs targeting potential entrepreneurs generally are embedded within broader support programs and tend to target vulnerable populations for whom employment alternatives may be limited. While programs serving practicing entrepreneurs focus on strengthening entrepreneurs’ knowledge, skills and business practices, which while unlikely to transform an enterprise in the near term, may accrue benefits to entrepreneurs over time. The study also offers implications for policy and program implementation, emphasizing the importance of clarity about target groups and desired outcomes when making program choices, and sound understanding of extent to which publicly-supported programs offer a broader public good, and compare favorably to policy alternatives for supporting the targeted individuals as well as the overall economic and social objectives.Publication Zambia Economic Brief, June 2015, Issue 5(World Bank, Washington, DC, 2015-06-01)After several years of strong economic performance, Zambia now confronts several important challenges that must be managed carefully to ensure sustained and inclusive growth in the future. On the one hand, the economy grew by an estimated 5.5–6.0 percent in 2014, somewhat above the average for African economies. Monthly copper production increased by an average of 8 percent during the second half of 2014, reversing the sharp slide in early 2014. Inflation fell to 7.2 percent in March and April, helped both by falling world oil prices and by the Bank of Zambia’s monetary tightening. In the first half of 2015, the authorities adjusted several key economic policies to respond to serious problems: revising rules on VAT refunds in February, announcing a new mining fiscal regime in April, and raising fuel prices in May so that the government could recover import costs. On the other hand, the kwacha has come under renewed pressure. It lost 17 percent of its value against the U.S. dollar from December 2014 through the end of March 2015. Since then it has recovered somewhat, but foreign exchange markets remain volatile. Interest rates have been rising since September 2014, due in part to increased government borrowing and in part to steps taken by the Bank of Zambia to tighten credit. Over the medium term, growth should hold steady in 2015 and then accelerate to around 6–7 percent per year in 2016–2018. Although inflation is expected to rise towards the end of 2015, it should resume falling in 2016. Low commodity prices, a more stable exchange rate, and adequate local harvests would help contain inflationary pressures and boost real disposable incomes. The resulting pick-up in private consumption, coupled with increasing copper exports, should help strengthen growth prospects.Publication A Gender Employment Gap Index (GEGI)(Washington, DC: World Bank, 2022-02-22)Despite a policy consensus that closing gender employment gaps will boost economic growth, relatively little is known about the size of these gains in many developing countries. This paper develops a new Gender Employment Gap Index (GEGI), which is equal to the size of long-run GDP per capita gains from closing gender employment gaps. The GEGI is simple and transparent and can be easily constructed using closed-form expressions for almost all countries using macroeconomic employment rate data by gender. The basic variant of the GEGI is the gap between male and female employment as a share of total employment. The full GEGI is similar, but instead of using an aggregate employment gap, the full GEGI is the weighted average of a “better employment gap” and “other employment gap.” The basic and full GEGIs are similar (correlation of 0.97), and both average 19 percent across countries. This means that GDP per capita in the long run would be almost 20 percent higher if female employment were exogenously increased to be the same as men’s (other things being equal). The paper also provides an application for the Pacific Islands, for which a simple measure like the GEGI is particularly important given the lack of alternative estimates.Publication Reducing Poverty and Investing in People : The New Role of Safety Nets in Africa(Washington, DC: World Bank, 2014)For two decades, Africa’s strong economic growth has paved the way for poverty reduction. Nevertheless, high chronic poverty levels persist, and the gap between income groups in terms of human capital and access to basic services is growing. Also, poor households are vulnerable to frequent shocks. By providing regular, reliable support to poor households and helping them invest in productive activities, targeted interventions such as safety nets help reduce persistent poverty, reverse the trend of increasing inequality, and build household resilience. Until recently, safety nets were implemented only on an ad hoc basis in Africa. However, in the wake of the global economic crisis, policy makers are increasingly viewing safety nets as core instruments for reducing poverty and managing risk. Also a momentum toward rationalizing public spending to provide more adequate and targeted support to the poorest is emerging in response to growing evidence that safety nets can successfully reduce poverty and vulnerability and promote inclusive growth. This book assesses the status and analyzes the objectives, features, systems, performance, and financing of safety nets in 22 African countries. It then identifies how governments and donors can strengthen safety net systems and protect and promote poor and vulnerable people. Overall, the book finds that safety nets are on the rise in Africa and are beginning to evolve from fragmented stand-alone programs into integrated systems. Social protection programming has started to change from largely emergency food aid programs to regular, predictable safety nets including targeted cash transfers and cash-for-work programs. Some countries, including Ghana, Kenya, Rwanda, and Tanzania, are working toward consolidating their programs into a national system. Impact evaluations of safety nets in Africa are also increasingly being undertaken and, with recent research into the productive aspects of cash transfer programs, have yielded encouraging evidence that safety nets reduce poverty and vulnerability. The timely analysis of safety nets in Africa provides a solid foundation for evidence-based policy dialogue and programming. As a result of the growing body of evidence that safety nets contribute to inclusive growth, African decision makers are now putting safety nets high on their development agendas.