Farm-level adaptation to climate change in Western Bangladesh: An analysis of adaptation dynamics,profitability and risks

Using long-term district-level climate data and a case study from a drought-prone village in western Bangladesh, this research explored trends in climate change, and analysed farmers’ adaptation dynamics, profitability and risks. This is the first study of its kind for drought-prone areas in Bangladesh.Farmers perceived climate changes included increases in temperature and decreases in rainfall which were as consistent with the trends of Chuadanga climate records. Farmers’ adaptation measures included changes in cropping systems, cropping calendars, crop varieties, agronomic practices, crop diversification and improved animal husbandry. Reducing environmental stress, ensuring self-sufficiency in staple crops (mainly rice) and other crop production practices, and enhancing economic viability of farm enterprises have underpinned these adaptations. Off-farm and non-farm wage employment, temporary migration, self-employment and educating children, constituted the core non-farm adaptation strategies.Emerging cropping systems like maize/cucumber and maize/stem amaranth/rice were economically more viable than the traditional rice/rice and rice/maize systems. Despite some uncertainties, farming was preferred to off-farm work, generating higher returns to labour for all cropping systems. Limited access to stress-tolerant varieties, extension services and affordable agricultural credit, combined with high production costs, variability in crop yields and output prices, are the main barriers to adaptation. Stronger agricultural research and support services, affordable credit, community-focussed farming education and training are critically important for effective adaptation to climate change.     

Determinants, differentiation, and development of short-term marginal costs in dairy production: an empirical analysis for selected regions of the EU

This work provides evidence on the determinants, cost differentiation, and development of short‐term marginal costs of dairy farms in important production regions of the European Union. The empirical study is based on the estimation of multi‐input multi‐output Symmetric Generalized McFadden cost functions using an unbalanced panel data set of the European Farm Accountancy Data Network. The results show considerable regional differences in the impact of the outputs, input prices, and fixed factors on marginal costs. Strong evidence can be found that marginal costs decrease over time and is further underlined by the development of derived regional aggregated short‐term supply curves. Marginal cost elasticities and correlation coefficients validate the hypotheses that a high degree of farm specialization, large milk output, and low milk prices are associated with lower marginal costs. Furthermore, the marginal cost spread in the data sample is analyzed. We show that milk output, milk yield, herd size, labor input, and fodder production can be attributed to significant marginal cost differentiation of farms, whereas for crop and animal output, grassland, stock of other animals, and depreciation only minor differentiation can be found.     

Determinants of the grant lag and the surrender lag of horticultural crop plant breeders’ rights applications: Survival analysis with competing risks

Obtaining a Plant Breeders’ Rights (PBR) certificate provides horticultural institutions the exclusive right to produce and reproduce new varieties, which directly motivate new plant variety innovations. This study investigates how the grant and surrender lag of PBR certificates is influenced by the crop type and applicant characteristics using the Canadian Food Inspection Agency horticultural crop PBR application data for the period 1992–2014. Results from the Fine and Gray subdistribution hazard model reveal that the grant lag and surrender lag of Canadian PBR applications significantly vary by the country of origin of the applicant, whether the applicant is a public institution or private company/individual, horticultural crop types, and the decades when applications are filed. The policy implications of the results provide useful information to stakeholders of the Canadian Plant Breeders’ Rights System regarding how the lifespan of PBRs is influenced by crop type and applicant characteristics.     

渔业企业质量认知与行为选择的实证分析一一以上海市为例

在渔业产品质量安全的生产者行为理论分析基础上,采用抽样调查的实证方法,利用上海市渔业企业的问卷调查数据,对渔业企业的质量安全认知水平、控制意愿和控制行为进行了实证研究。结果表明渔业企业的质量安全认知水平不高,质量安全控制意愿不强烈,安全控制行为较少,对此提出了具有针对性和可操作性的政策建议。     

Policy and competitiveness of agroforestry-based technologies for maize production in Cameroon: An application of policy analysis matrix

Questions have been raised about the ecological consequences and economic sustainability of exclusive reliance on chemical fertilizers for the rapidly expanding maize production across sub-Saharan Africa. Alternative agroforestry-based natural resource management technologies have been developed for farmers. This paper applies the policy analysis matrix (PAM) to analyze the social profitability of agroforestry-based technologies for maize production in the highland savanna zone of Cameroon, and the impacts of policy shifts on the financial competitiveness of maize production under these technologies. The paper shows that maize production under agroforestry-based systems has high comparative advantage.     

An analysis of bundle pricing in horizontal and vertical markets: The case of the U.S. cottonseed market

The U.S. cottonseed market has seen the rapid development and adoption of seeds with differing bundles of genetically modified (GM) traits. It has also seen an increase in vertical integration by biotechnology firms. In this article, we investigate the price impacts associated with structural changes in the U.S. cottonseed market from 2002 to 2007. We develop a structural model to examine the substitution/complementarity relationships among cottonseeds sold with different genetic trait bundles and under different vertical arrangements. We examine the price impacts emanating from product differentiation, market concentration, and market size. The econometric investigation finds evidence of subadditive bundle pricing in patented biotech traits. While higher own‐market concentrations are found to be associated with higher prices, we also uncover evidence of cross‐product complementarity effects that lead to lower prices. Simulations are used to evaluate net price effects, illustrating the usefulness of the approach in the analysis of changing market structures.     

Behind the ‘creative destruction’ of human diets: An analysis of the structure and market dynamics of the ultra-processed food manufacturing industry and implications for public health

A global transition towards diets increasingly dominated by ultra-processed foods (UPFs) has occurred in recent decades to the detriment of public health and the environment. This study aimed to examine long-term trends in the structure and market dynamics of the global UPF manufacturing industry as part of broader efforts to understand the drivers of this transition. Using diverse methods, metrics and data sources, we examined several dimensions (e.g., industry concentration and profitability) according to an adapted structure–conduct–performance model. We found that the global UPF manufacturing industry has evolved to become a major component of global food systems, with its longstanding dominant corporations becoming some of the system's largest accumulators of profit and distributors of capital. It follows that reversing the global UPF dietary transition will require structural and regulatory changes to ensure that population diets, and food systems more broadly, are not subordinated to the interests of powerful for-profit business corporations.