Institut für Agrarpolitik und Landwirtschaftliche Marktlehre

Permanent URI for this collectionhttps://hohpublica.uni-hohenheim.de/handle/123456789/17

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Assessing the socioeconomic and heterogeneous impacts of noise pollution on food markets in Akure metropolis, Nigeria
(2025) Olutumise, Adewale Isaac; Oparinde, Lawrence Olusola; Oloruntoba, Modupe Mary; Oluwafemi, Soliu Abdulqoyum; Oluwasanmi, Feyisayo Aderogba; Akinrotimi, Abiodun Festus; Oladoyin, Olanrewaju Peter; Ajibefun, Igbekele Amos
As urbanization intensifies across sub-Saharan Africa, noise pollution has emerged as a critical yet underexplored environmental and economic stressor for informal market economies. While prior studies have largely focused on the health impacts of noise, limited empirical research exists on its direct effect on market vendors’ economic performance, particularly in rapidly urbanizing African cities. This study addresses this gap by examining the socioeconomic and heterogeneous impacts of noise pollution on food markets in Akure Metropolis, Nigeria. Using primary data collected from 120 food vendors across four major markets, noise levels were measured with a sonometer, while a well-structured questionnaire captured the marketers’ socioeconomic characteristics and perceptions. Unconditional Quantile Regression (UQR) was employed to analyze the heterogeneous impacts of noise pollution on vendors’ income levels. The results show that noise pollution significantly reduces income at the 50th and 75th quantiles, while noise perception has a significant negative effect at lower income levels. The socioeconomic factors, such as sex, education, shop size, and market experience, were also found to significantly influence income levels. The study highlights the need for market zoning regulations, noise control policies, and targeted trader support programs to mitigate noise pollution’s adverse effects and promote sustainable urban commerce.
Can market fragmentation explain the limited success of political attempts to promote grain legume cultivation in Germany?
(2025) Mittag, Franziska; Hess, Sebastian
Grain legumes, such as field peas, field beans, sweet lupins and soybeans, are known to increase biodiversity within the appropriate crop rotation and are an important source of import-substituting feed protein. National and regional policy schemes have long tried to support the cultivation of grain legumes. Although many regions in Germany offer favourable conditions for grain legumes, previous subsidy schemes have failed to increase the area under cultivation and farmers report a lack of market incentives. Indeed, the available price data exhibit a substantial share of non-random missing values in weeks when grain legumes were not traded. We analyse these non-price periods using cointegration tests and single-hurdle Tobit models. The results indicate that regional price formation for grain legumes in German regions depends not only on a minimum quantity of the respective legume crop in supply but also on a favourable supra-regional soybean price: Regional grain legume markets are not integrated and show evidence of a fragmented market structure. This may explain why local grain legume value chains have failed to emerge in Germany, despite decades of policy attempts to support these crops.
The commitment of farmers to traditional and hybrid cooperatives: empirical evidence over a six‐year period
(2024) Hansen, Rebecca; Hess, Sebastian; Nilsson, Jerker; Ollila, Petri
This study investigates the commitment of farmer members to traditional and hybrid cooperatives, and examines how and why their commitment has changed over time. The empirical basis consists of three surveys of representative samples of Finnish farmers conducted in 2010, 2013 and 2016. Dairy cooperatives in Finland have a traditional organizational form. Animal breeders deliver to hybrid cooperatives that have some external investors, but farmers have the majority of the votes. In both industries, the farmers are committed to their cooperatives and increasingly so over the years. This is particularly true of dairy farmers. However, the members’ commitment is based more on their satisfaction with the cooperatives’ business activities rather than on any cohesion within the cooperative societies. One explanation for this is that primary agriculture is becoming more consolidated, with fewer but larger farms whose owners are business oriented and professional.
Comparing hops and malt price transmission in the beer value chain: evidence from Germany
(2025) Hess, Sebastian; Bublik, Nikolas
The German beer value chain has received limited attention so far, despite the country’s central role in global beer production. This study investigates the price dynamics of its two key inputs—hops and malt—using monthly price data from 2015 to 2024 based on a unique dataset from a German hops cooperative. While contract farming is common for both raw materials, malt is traded via private firms, whereas hops are marketed almost exclusively through farmer-owned cooperatives. A vector error correction model (VECM) is estimated, incorporating structural break dummies identified through Bai–Perron tests, followed by forecast error variance decomposition (FEVD) and impulse response function (IRF) analysis. The results show that hop prices are largely self-driven and adjust more quickly to deviations from equilibrium than malt or beer prices. While malt and beer exhibit stronger interdependencies, the hop sector displays greater price stability. The findings further reveal that the malting sector responded significantly to the recent energy price crisis in Germany, whereas the hop sector did not.
Household decision dynamics and food insecurity: evidence from the one-cow-per-poor-family programme in Rwanda
(2025) Kareem, Olayinka Idowu; Akeremale, Mayokun; Wieck, Christine; Dusingizimana, Theogene; Kamana, Olivier; Chagunda, Mizeck G. G.
Rwanda, like many African countries, endeavours to overcome the food insecurity challenge with different initiatives. One such initiative is the ‘ one-cow-per-poor-family’ programme known as the ‘Girinka Programme’. With the introduction of every cow into the household, there is a resultant change in household bio-economics. Subsequently, some decisions must be made regarding either the consumption or the selling of milk, calves or manure. This study investigates the effect of household decision dynamics within the framework of this programme on food insecurity in Rwanda. The micro-econometrics analytical approach is adopted in the empirical strategy using the household data from the ‘Girinka Programme’ in an ordered probit model. A total of 3000 households were surveyed, and data were collected across 20 districts in Rwanda in 2016 and 2017 and used in the empirical estimations. Our findings affirm the a priori expectation that households’ food insecurity is reduced with additional income sources. Besides, the results indicate that the households acquired and/or used more land by participating in the programme through access to cow’s manure and income earned either by selling the heifer or milk, than before the programme. Also, we find that households with a higher number of calves are more food-secure. The estimations indicate that there is heterogeneity in the level of food insecurity across the districts owing to the decision dynamics of the households across the districts, which lead to different outcomes. The study concludes that participation in the Girinka Programme's intervention significantly reduced food insecurity. To this end, there is a need to establish, as a strategic policy option, the institutionalisation and strengthening of the Girinka Programme for sustainability, which should be affirmed and safeguarded as a social protection policy that directly impacts food insecurity and supports the attainment of sustainable development.

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