Value Chain Surveys What Do They Cover And How Well

While agricultural value chains are rapidly evolving (Reardon, 2015; Reardon et al., 2021; Barrett et al., 2022), research attention has increasingly taken notice of the important role played by actors in the ag ricultural midstream. The agricultural midstream consists of activities that take place after production but before final sale to consumers, with existing literature highlighting transportation, trading/wholesaling, processing/packaging, and storage as key activities (Reardon, 2015; Ambler et al., 2022a). However, even as research on the agricultural midstream has been growing, little is known about the poten tial financial needs or capabilities of midstream actors (Ambler et al., 2022a; Bellemare et al., 2021; Reardon and Minten, 2021). If midstream actors face meaningful financial constraints in growing their businesses, it can hinder employment opportunities, increase consumer food prices, depress agricul tural producer prices, or constrain growth more broadly.

Between April and October 2020, the International Food Policy Research Institute (IFPRI) and Michigan State University (MSU), with support from the United States Agency of International Development (USAID) and the Livelihoods and Food Security Fund (LIFT), have undertaken analyses of secondary data combined with regular telephone surveys of actors at all stages of Myanmar’s agri-food system in order to better understand the impacts of COVID-19 on the system. These analyses show that the volume of agribusiness has slowed considerably in Myanmar since COVID-19 restrictions were put in place. There is lower demand from farmers for agricultural inputs and mechanization services and lower volumes of produce traded, especially exports to neighboring countries whose borders are closed. All actors in the agri-food system are facing liquidity constraints and experiencing increased difficulties in both borrowing and recovering loans.

Recognizing that agrifood value chains (AFVCs) are essential to ensure food security and foster structural change, FAO seeks to reassess the array of policies and interventions needed to protect and strengthen AFVCs in low-income countries and fragile states. [Author] This White Paper aims to contribute to this initiative by shedding light on largely unaccounted-for market structures at midstream segments of AFVCs. [Author] Building on the field of Industrial Organization in economics, we develop a theoretical framework and a related simulation tool that one can inform with existing or specifically collected data. [Author] Simulation outcomes help predict how different types of shocks may affect key food security outcomes, under different levels of concentration in midstream segments of AFVCs. [Author] We illustrate this approach using data from the Ethiopian wheat AFVC in 2013. [Author]

A special year like 1999 invites one to draw a balance of what has been achieved in the roughly 30 years of research and development in knowledge based systems (still abbreviated as XPS following the older term “expert systems”) and to take a look at th what the future may hold. For the 5 German conference on knowledge-based systems we therefore asked current and former speakers of the four working groups (FG’s) in the subdivision of knowledge-based systems (FA 1.5) of the German association of Informatics (GI) to present a survey of and future prospects for their respective fields: knowledge engineering, diagnosis, configuration, and case-based reasoning. An additional 14 technical papers deal with current topics in knowledge-based systems with an equal emphasis on methods and applications. They are selected from more than 50 papers accepted in the 4 parallel workshops of XPS-99: a) Knowledge Management, Organizational Memory and Reuse, b) various fields of applications, c) the traditional PuK Workshop (planning and configuration), and d) the GWCBR (German workshop on case-based reasoning). The other papers presented at these workshops are not included in this volume but are available as internal reports of Würzburg university together with the exhibition guide that emphasizing tool support for building knowledge based systems.

It is widely feared that the COVID-19 pandemic will lead to a significant worsening of the food security situation in low and middle-income countries. One reason for this is the disruption of food marketing systems and subsequent changes in farm and consumer prices. Based on primary data in Ethiopia collected just before the start and a few months into the pandemic, we assess changes in farm and consumer prices of four major vegetables and the contribution of different segments of the rural-urban value chain in urban retail price formation. We find large, but heterogeneous, price changes for different vegetables with relatively larger changes seen at the farm level, compared to the consumer level, leading to winners and losers among local vegetable farmers due to pandemicrelated trade disruptions. We further note that despite substantial hurdles in domestic trade reported by most value chain agents, increases in marketing – and especially transportation – costs have not been the major contributor to overall changes in retail prices. Marketing margins even declined for half of the vegetables studied. The relatively small changes in marketing margins overall indicate the resilience of these domestic value chains during the pandemic in Ethiopia.

The changing manufacturing environment requires more responsive and adaptable manufacturing systems. The theme of the 5th International Conference on Changeable, Agile, Reconfigurable and Virtual production (CARV2013) is "Enabling Manufacturing Competitiveness and Economic Sustainability. Leading edge research and best implementation practices and experiences, which address these important issues and challenges, are presented. The proceedings include advances in manufacturing systems design, planning, evaluation, control and evolving paradigms such as mass customization, personalization, changeability, re-configurability and flexibility. New and important concepts such as the dynamic product families and platforms, co-evolution of products and systems, and methods for enhancing manufacturing systems' economic sustainability and prolonging their life to produce more than one product generation are treated. Enablers of change in manufacturing systems, production volume and capability, scalability and managing the volatility of markets, competition among global enterprises and the increasing complexity of products, manufacturing systems and management strategies are discussed. Industry challenges and future directions for research and development needed to help both practitioners and academicians are presented. About the Editor Prof. Dr.-Ing. Michael F. Zaeh, born in 1963, has been and is Professor for and Manufacturing Technology since 2002 and, together with Prof. Dr.-Ing. Gunther Reinhart, Head of the Institute for Machine Tools and Industrial Management (iwb) at the Technische Universitaet Muenchen (TUM). After studying general mechanical engineering, he was doctoral candidate under Prof. Dr.-Ing. Joachim Milberg at TUM from 1990 until 1993 and received his doctorate in 1993. From 1994 to 1995, he was department leader under Prof. Dr.-Ing. Gunther Reinhart. From 1996 to 2002, he worked for a machine tool manufacturer in several positions, most recently as a member of the extended management. Prof. Dr.-Ing. Michael F. Zaeh is an associated member of the CIRP and member of acatech, WGP and WLP. His current researches include among others Joining and Cutting Technologies like Laser Cutting and Welding as well as Friction Stir Welding, Structural Behaviour and Energy Efficiency of Machine Tools and Manufacturing Processes like Additive Manufacturing.

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