David Zilberman | |
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Born | May 9, 1947 |
Alma mater | Tel Aviv University |
Occupation | Professor University of California, Berkeley |
Notable work | Wolf Prize in Agriculture, 2019 |
Website | www |
David Zilberman (born May 9, 1947) is an Israeli-American agricultural economist, professor and Robinson Chair in the Department of Agricultural and Resource Economics at the University of California, Berkeley. [1] Zilberman has been a professor in the Agricultural and Resource Economics Department at UC Berkeley since 1979. His research has covered a range of fields including the economics of production technology and risk in agriculture, agricultural and environmental policy, marketing and more recently the economics of climate change, biofuel and biotechnology. He won the 2019 Wolf Prize in Agriculture, he is a member of the US National Academy Science since 2019, was the President of the Agricultural and Applied Economics Association (AAEA), [2] and is a Fellow of the AAEA, Association of Environmental and Resource Economics, and the European Association of Environmental and Resource Economics. [3] David is an avid blogger on the Berkeley Blog [4] and a life-long Golden State Warriors fan.
Zilberman was born in Jerusalem in Mandatory Palestine. He attended Hebrew University Secondary School. After serving in the Army and working on a Kibutz, he received his B. A. in Economics and Statistics at Tel Aviv University, Israel, and obtained his Ph.D. in Agricultural and Resource Economics at the University of California, Berkeley, in 1979. Zilberman is married to Leorah Abouav-Zilberman and has 3 sons and 6 grandchildren.
Zilberman has been teaching, conducting research and serving as an extension specialist at UC Berkeley. His research combines, theory, empirical work and outreach. His research mostly addresses either management or policy problems in the nexus of agriculture, natural resources and the environment. He has been involved in major policy debates, including the transition to water markets, regulation and use of pesticides, and biotechnology and biofuel policies. Zilberman’s research incorporates features of agronomic and biophysical systems into economic models. His work emphasizes heterogeneity of people and location, as well as dynamics and risk. He has published in academic journals including Science , the Quarterly Journal of Economics , Nature Biotechnology , The American Economic Review , Econometrica , and the Journal of Development Economics . He is the editor of the Annual Review of Resource Economics . [5] [6]
His major areas of research include:
The traditional literature of technology diffusion viewed it as a process of imitation. Zilberman modeled diffusion as a result of economic choices by heterogeneous decision makers affected by dynamic processes. Zilberman, Zhao, and Heiman (2013) [7] that choices of others make people aware of new technology, but they assess it according to their preferences and constraints. Differences in adoption behavior reflect economic and demographic heterogeneity. Dynamic processes such as learning by doing [8] and learning by using [9] may reduce the cost and increase the benefit of new technologies and enhance adoption over time. Feder, Just, and Zilberman (1985). [10] studied both modelling of adoption choice (to adopt or not) and adoption intensity (how much to adopt) and emphasized the role of risk and risk aversion, lack of access to credit, and tenancy in slowing adoption of modern technology in developing countries.
The survey by Sunding and Zilberman (2001), [11] views technological innovations as outcomes of multistage activities (research, development, commercialization, marketing, adoption) affected by economic incentives. They suggest that studies of adoption should explicitly analyze the impact of marketing efforts including, advertisement, money back guarantee, sampling and demonstration.
Graff, Heiman and Zilberman (2002) [12] emphasize the important role of the educational industrial complex in introducing modern innovations. University research may come with new concepts and the right to develop these technologies may move to startups that may become or taken over by major companies. Excellence in research and development and affective technology transfer mechanisms are becoming key to strength in agriculture and industry.
Zilberman et al. (2013) [13] looks at the political economy of biotechnology, especially in cross-continental differences in political economic outcomes with regards to adoption of agricultural biotechnology. This analysis contributed to understanding how the ideologies of GM crops have played out in the U.S. versus Europe and Africa, and the different interest groups that played a role in this dynamic process. Zilberman, Kaplan, and Wesseler (2015) [14] tried to understand the welfare loss associated with delayed adoption of GM technologies due to regulatory barriers. The article examined the specific context of adoption of Golden Rice, which prevents Vitamin A deficiency, as well as major food crops like corn, wheat, and rice in general. This analysis contributed to understanding welfare implications of lack of GM adoption around the world, using simple economic tools and assumptions about yield effects.
Caswell and Zilberman (1986) [15] developed a framework to assess the economics of irrigation technology. This framework distinguished between applied water and effective water (water utilized by the crop). Irrigation efficiency (the ratio of effective to applied water), is higher with modern irrigation technology and on soils with high water holding capacity. They predict that modern irrigation technologies (drip irrigation) will tend to increase yields but may actually increase water use per unit of land. These technologies are more likely to be adopted on sandy soils, higher value crop and locations with higher cost of water. Taylor and Zilberman (2017) [16] analyze the diffusion of drip irrigation in California, showing that it was first adopted on high value crops, the droughts accelerated the diffusion rate and that the collaboration between extension and private sector was crucial for adapting the technology to different crops and regions.
Zilberman, D., M. Khanna, and L. Lipper (1997), [17] Khanna and Zilberman (2001) [18] extended the notion of water use efficiency for studying the incentives for adoption of modern irrigation technologies to thinking more broadly about technologies that can increase input-use efficiency in a range of other contexts and the economic incentives and barriers to their widespread adoption. These technologies included those that increase energy efficiency of power generation in India, fertilizer use efficiency in corn production in the Midwest and other conservation technologies that can lead to sustainable growth. A key contribution of this work was to show how policy distortions can reduce incentives to adopt technologies that are otherwise economically efficient and environmentally preferred.
Zilberman et al., (2008) [19] looks at water resource management "in an era of high energy prices". The article found that rising energy prices will hurt pumping of groundwater for agriculture, will increase reliance on hydroelectric, and may cause water to be diverted away from crop agriculture, leading to higher food prices.
Hamilton et al., (2013) models the collective waste disposal problem under network externalities arising from a networked waste disposal system leading to a centralized processing facility. The article found that this setup optimally results in a spatial pattern of worse "local pollution" and lower usage of the disposal system for waste producers farther away from the central facility.
Xie and Zilberman 2016, [20] 2017 [21] address whether two common approaches to tackling water scarcity, namely water use efficiency improvement and water storage capacity expansion, complement or substitute each other. These works explore theoretically counter-intuitive, practically relevant implications on infrastructure investment, consumption efficiency, and conservation of water and other resources.
Collender and Zilberman (1985) [22] derived a land allocation rule which is both independent of the nature of the underlying distribution of each element in the choice set and accounts for all moments of that distribution. This decision rule is applied to the choice between cotton and corn in the Mississippi Delta to demonstrate that consideration of just the first two moments of the distribution can often be unjustified and damaging empirically, theoretically, and in terms of the utility of the decision maker.
Lichtenberg and Zilberman (1986) [23] developed a damage control function to assess pesticide impacts. Some of the potential output is lost because of pest damage which depend on the pest population, climatic and biophysical conditions. Pest damage can be reduced by application of pest control tools, but the longterm impact may be compromised because of residence. They show that estimation of pesticide productivity requires precise specification of damage functions and misspecification may lead to significant estimation error. The damage control function has had a wide range of applications, including assessing the impact of GMOs, and is reviewed in Sexton, Lei and Zilberman (2007). [24]
Wu, Zilberman and Babcock,(2001) [25] developed a conceptual framework to allocate a public fund that is paying producers to utilize lands or other resources in activities that benefit the environment. Traditional policies aimed to maximize total amount of land enrolled in the programs, others aimed to use resources on the land with the best amenities. The paper shows that is economically efficient to target lands that have the highest ration of environment benefit per acre. Babcock et al,(1997) [26] demonstrate with data from the Midwest, that while landowners prefer targeting schemes that purchase the less productive land, targeting land with the highest benefit per dollar spent ratio, may increase environmental amenities by 10-30%.
Zilberman, Lipper and McCarthy, (2008) [27] study the distributional effect of payment for ecosystem services. They show paying to divert land from production to environmental activities may harm the poor, while working land program may be good for the environment and the poor.
Zivin, Hueth, and Zilberman (2000) [28] develops a bioeconomic model in which a species is considered both a pest and a resource. Steady state populations and optimal control are shown to depend on a range of regulatory and economic factors. An application to the case of feral pigs in California, suggests that allowing landowners to capture the recreation benefits associated with wild pigs, and thus transforming their land into a multiple-use resource, results in a larger steady-state population of pigs and increased returns to landowners.
Ogishi, Zilberman, and Metcalfe (2003) [29] looks at the effectiveness of legislation on controlling animal waste residues has been limited. The article argues that the legislation has not adjusted to recent changes in the structure of livestock production systems, in particular contract farming and industrialization of agriculture. The paper proposes policy reforms that increase liability of large agribusiness firms, also known as integrators, for the negative environmental side effects caused by their producers’ livestock operations. The reforms should also extend the liability to all participants in animal production and consumption activities.
Zivin, Just, and Zilberman (2006) [30] investigates the Coase theorem under stochastic externality. Ronald Coase famously won the Nobel prize for his work claiming that a competitive system with well-defined property right assignments, perfect information, and zero transaction costs would attain Pareto optimality through a process of voluntary bargaining and side payments. This paper investigates this claim in the context of a stochastic externality problem and finds that, when at least one agent is risk averse, optimal outcomes are not independent of the initial assignment of property rights. If large, well-connected firms are viewed as (nearly) risk neutral and small firms with limited access to financial management tools are viewed as risk averse, then the results of this paper can easily be translated into practical policy suggestions. When both polluter and pollutee are large, liability rules are of little consequence—agents will bargain to efficient outcomes, i.e. the Coase result obtains. When the polluter is large and the pollutee is small, polluters should face complete liability for damages. When the polluter is small and the pollutee is large, all liability rules will be non-optimal and efforts to contract on verifiable polluter activities, rather than realized damages, will be preferred.
Zivin and Zilberman (2002) [31] develops and implements an economic model of environmental health risk regulation that is based on scientific constructs utilized in public health. This structural specification allows one to identify a menu of policy options, including the selection of optimal policies where vulnerable subgroups of the population are targeted with special exposure-reducing treatments, so called ‘tagging’. Analytic results show that the potential economic gains from tagging will depend critically on the quality of existing capital, the degree of returns to scale in treatment technologies, and the size and sensitivity of the vulnerable population. An empirical application of the model to the case of cryptosporidium in drinking water supplies suggest that tagging can substantially reduce the costs of meeting health standards in small and medium-sized water districts.
Du et al.(2015) [32] looks at optimal use of risk management tools when multiple tools are available. Contracts and crop insurers are important means for farmers to mitigate risks in modern U.S. agriculture. This article investigates the effect of crop insurance enrollment on contract terms and farmers’ participation in marketing contracts and shows that improved terms of crop insurance (lower premiums, higher subsidies) make contracts less appealing to farmers as mechanisms for mitigating risk. Therefore, intermediaries may revise their contract offers so that they are more attractive. However, improvements in contract terms are limited by their cost to the intermediaries and will not lead to expanded participation in contracts.
Zhao and Zilberman (1999) [33] extend the real options theory to account for partial and endogenous reversibility. The article showed that accounting for costly reversibility is critical in water resource development. The real options framework has since been applied to natural resource management and restoration that account for resource conserving technological changes in the future (Zhao and Zilberman, 2001 [34] ), to money back guarantees where learning about product quality and fit occurs after purchases have been made (Heiman et al., 2002 [35] ), and technology adoption and adaptation to climate change where irreversibility plays a critical role (Zilberman, Zhao and Heiman, 2012 [36] ).
Zilberman et al. (2022) [37] suggests that economic research should emphasize innovation and supply chain. They distinguished between innovation and product supply chain. Innovation supply chain converts ideas into products and product supply chain implements them. Innovation supply chain may consist of university discoveries, development by startups, and transfer to companies. Product supply chain design requires decisions about structure (vertical integration, use of contracting or markets at different stages of the supply chain). Supply chain design established new products and arrangements. Generally, new supply chains tend to take advantage of market power and evolve over time as they expand over space and encounter competition. Credit conditions and risk considerations affect supply chain design. Supply chain consideration is crucial in determining policy.
Du et al. (2016) [38] and Lu, Reardon, and Zilberman (2017) [39] present a conceptual framework depicting the issues and strategies of a firm with an innovation (in product or technology or system). To “implement” the innovation in terms of procurement of feedstock (intermediate inputs), production and processing, and marketing, the innovating firm undertakes strategic design of its supply chain. It must decide how much to produce, what segments of the supply chain to undertake in-house versus sourcing externally, and what institutions such as contracts and standards it will use to coordinate the suppliers assuring its external sourcing.
David has served as a consultant for the World Bank, The United Nations Food and Agriculture Organization, the USDA, CGIAR, the Environmental Protection Agency and has served on two National Research Council panels.
Zilberman has worked in agricultural economics, environmental economics, resource economics, water, climate change, biofuel and agricultural biotechnology. He is an active advocate of agricultural biotechnology, engaging in public debates on issues surrounding genetically modified technologies and intellectual property. He is a frequent contributor to the Berkeley Blog, [40] a blogging platform for UC Berkeley faculty. In mid-1990s Zilberman, with fellow economists Vittorio Santaniello and Robert Evenson, established the International Consortium of Agricultural Biotechnology Research which aims to facilitate interaction among researchers and analysts. [41] In 2001, he was the founding co-director of the Beahrs Environmental Leadership program, [42] which provides training in environmental and natural resource science, policy, and leadership. Since then, the program has graduated 702 alumni from over 114 countries. [42] In 2012, with support from the Macarthur Foundation, he started the UC Berkeley Master of Development Practice (MDP), [43] a 2-year professional degree aimed at development practitioners.
Agriculture encompasses crop and livestock production, aquaculture, and forestry for food and non-food products. Agriculture was a key factor in the rise of sedentary human civilization, whereby farming of domesticated species created food surpluses that enabled people to live in cities. While humans started gathering grains at least 105,000 years ago, nascent farmers only began planting them around 11,500 years ago. Sheep, goats, pigs, and cattle were domesticated around 10,000 years ago. Plants were independently cultivated in at least 11 regions of the world. In the 20th century, industrial agriculture based on large-scale monocultures came to dominate agricultural output.
Precision agriculture (PA) is a farming management strategy based on observing, measuring and responding to temporal and spatial variability to improve agricultural production sustainability. It is used in both crop and livestock production. Precision agriculture often employs technologies to automate agricultural operations, improving their diagnosis, decision-making or performing. The goal of precision agriculture research is to define a decision support system for whole farm management with the goal of optimizing returns on inputs while preserving resources.
Agronomy is the science and technology of producing and using plants by agriculture for food, fuel, fiber, chemicals, recreation, or land conservation. Agronomy has come to include research of plant genetics, plant physiology, meteorology, and soil science. It is the application of a combination of sciences such as biology, chemistry, economics, ecology, earth science, and genetics. Professionals of agronomy are termed agronomists.
The following outline is provided as an overview of and topical guide to sustainable agriculture:
Sustainable agriculture is farming in sustainable ways meeting society's present food and textile needs, without compromising the ability for current or future generations to meet their needs. It can be based on an understanding of ecosystem services. There are many methods to increase the sustainability of agriculture. When developing agriculture within sustainable food systems, it is important to develop flexible business processes and farming practices. Agriculture has an enormous environmental footprint, playing a significant role in causing climate change, water scarcity, water pollution, land degradation, deforestation and other processes; it is simultaneously causing environmental changes and being impacted by these changes. Sustainable agriculture consists of environment friendly methods of farming that allow the production of crops or livestock without causing damage to human or natural systems. It involves preventing adverse effects on soil, water, biodiversity, and surrounding or downstream resources, as well as to those working or living on the farm or in neighboring areas. Elements of sustainable agriculture can include permaculture, agroforestry, mixed farming, multiple cropping, and crop rotation.
Agricultural economics is an applied field of economics concerned with the application of economic theory in optimizing the production and distribution of food and fiber products. Agricultural economics began as a branch of economics that specifically dealt with land usage. It focused on maximizing the crop yield while maintaining a good soil ecosystem. Throughout the 20th century the discipline expanded and the current scope of the discipline is much broader. Agricultural economics today includes a variety of applied areas, having considerable overlap with conventional economics. Agricultural economists have made substantial contributions to research in economics, econometrics, development economics, and environmental economics. Agricultural economics influences food policy, agricultural policy, and environmental policy.
Water reclamation is the process of converting municipal wastewater or sewage and industrial wastewater into water that can be reused for a variety of purposes. It is also called wastewater reuse, water reuse or water recycling. There are many types of reuse. It is possible to reuse water in this way in cities or for irrigation in agriculture. Other types of reuse are environmental reuse, industrial reuse, and reuse for drinking water, whether planned or not. Reuse may include irrigation of gardens and agricultural fields or replenishing surface water and groundwater. This latter is also known as groundwater recharge. Reused water also serve various needs in residences such as toilet flushing, businesses, and industry. It is possible to treat wastewater to reach drinking water standards. Injecting reclaimed water into the water supply distribution system is known as direct potable reuse. Drinking reclaimed water is not typical. Reusing treated municipal wastewater for irrigation is a long-established practice. This is especially so in arid countries. Reusing wastewater as part of sustainable water management allows water to remain an alternative water source for human activities. This can reduce scarcity. It also eases pressures on groundwater and other natural water bodies.
Agribusiness is the industry, enterprises, and the field of study of value chains in agriculture and in the bio-economy, in which case it is also called bio-business or bio-enterprise. The primary goal of agribusiness is to maximize profit while satisfying the needs of consumers for products related to natural resources such as biotechnology, farms, food, forestry, fisheries, fuel, and fiber.
Calestous Juma was a Kenyan scientist and academic, specializing in sustainable development. He was named one of the most influential 100 Africans in 2012, 2013 and 2014 by the New African magazine. He was Professor of the Practice of International Development and Faculty Chair of the Innovation for Economic Development Executive Program at Harvard Kennedy School. Juma was Director of the School's Science, Technology and Globalization Project at Harvard Kennedy School as well as the Agricultural Innovation in Africa Project funded by the Bill and Melinda Gates Foundation.
Water trading is the process of buying and selling water access entitlements, also often called water rights. The terms of the trade can be either permanent or temporary, depending on the legal status of the water rights. Some of the western states of the United States, Chile, South Africa, Australia, Iran and Spain's Canary Islands have water trading schemes. Some consider Australia's to be the most sophisticated and effective in the world. Some other countries, especially in South Asia, also have informal water trading schemes. Water markets tend to be local and informal, as opposed to more formal schemes.
The Association of Environmental and Resource Economists (AERE) was founded in 1979 in the United States as a means of exchanging ideas, stimulating research, and promoting graduate training in environmental and natural resource economics. The majority of its members are affiliated with universities, government agencies, non-profit research organizations, and consulting firms. Many of AERE's members hold graduate degrees in economics, agricultural economics, or related fields, but there are numerous student members as well. The organization also serves many non-specialist members with environmental policy interests. The United States is the country with the largest single share of AERE members, but the organization welcomes members from all countries. Annual individual memberships currently number approximately 800. AERE is generally acknowledged as the primary professional organization for Environmental and Natural Resources economists in the USA. The European Association of Environmental and Resource Economists is its European equivalent.
Rajamangala University of Technology Thanyaburi is a public university in Pathum Thani Province, Thailand. It was established on January 18, 2005, and is a member of the Rajamangala University of Technology system. It offers undergraduate programs in various fields such as engineering, industrial technology, agriculture, business administration, industrial design, architecture, fine arts, science and technology, education, mass communication technology, arts, Thai traditional medicine, and arts-related disciplines. The university aims to produce quality professionals in alignment with the rapidly changing fields of science and technology.
The Irrigated Rice Research Consortium (IRRC) focuses on agricultural research and extension in irrigated rice-based ecosystems. In partnership with national agricultural research and extension systems (NARES) and the private sector, the IRRC provides a platform for the dissemination and adoption of natural resource management (NRM) technologies in Asian countries. The IRRC is currently active in 11 countries: Bangladesh, Cambodia, China, India, Indonesia, Laos, Myanmar, the Philippines, Sri Lanka, Thailand, and Vietnam. It aims to strengthen NARES-driven interdisciplinary research, link research and extension, facilitate rice farmers' uptake of technological innovations, and enable environmentally sound rice production to expand to feed growing populations.
National Innovations in Climate Resilient Agriculture (NICRA) was launched during February 2011 by the Indian Council of Agricultural Research (ICAR) with the funding from the Ministry of Agriculture, Government of India. The mega project has three major objectives of strategic research, technology demonstrations and capacity building. Assessment of the impact of climate change simultaneous with formulation of adaptive strategies is the prime approach under strategic research across all sectors of agriculture, dairying and fisheries.
The water, energy and food security nexus according to the Food And Agriculture Organisation of the United Nations (FAO), means that water security, energy security and food security are very much linked to one another, meaning that the actions in any one particular area often can have effects in one or both of the other areas.
Digital agriculture, sometimes known as smart farming or e-agriculture, is tools that digitally collect, store, analyze, and share electronic data and/or information in agriculture. The Food and Agriculture Organization of the United Nations has described the digitalization process of agriculture as the digital agricultural revolution. Other definitions, such as those from the United Nations Project Breakthrough, Cornell University, and Purdue University, also emphasize the role of digital technology in the optimization of food systems.
Hans P. Binswanger-Mkhize was a Swiss economist. His research focused mainly on agricultural economics in developing countries.
Climate-smart agriculture (CSA) is a set of farming methods that has three main objectives with regards to climate change. Firstly, they use adaptation methods to respond to the effects of climate change on agriculture. Secondly, they aim to increase agricultural productivity and to ensure food security for a growing world population. Thirdly, they try to reduce greenhouse gas emissions from agriculture as much as possible. Climate-smart agriculture works as an integrated approach to managing land. This approach helps farmers to adapt their agricultural methods to the effects of climate change.
Elisabeth Sadoulet is an economist and Professor of Agricultural and Resource Economics at the University of California, Berkeley who has carried out field research in China, India, Latin America, and sub-Saharan Africa. Sadoulet was the editor of the World Bank Economic Review from 2010 to 2013, and is a fellow of several scholarly associations in the fields of agriculture and economics.
Matin Qaim is the Schlegel Professor of Agricultural Economics and Director at the Center for Development Research (ZEF) of the University of Bonn, Germany. His research focuses on issues of food security and sustainable development.