Publikasjoner
NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.
2024
Forfattere
Christer Thrane Gudbrand Lien Mehmet Mehmetoglu Ståle StørdalSammendrag
We examine the association between beer prices and the inherent characteristics of beers within the traditional price hedonic framework. Using a large-scale Norwegian data set with more than 9000 individual beer products from several production countries, we find that alcohol content has a strong, positive, and significant effect on the retail price of beer. In contrast, the effect of expert quality rating on beer price appears to be of only small to moderate importance. We also find significant and substantially important price differences between production countries. Finally, there is effect heterogeneity (i.e. interaction effects) for both alcohol content and quality rating with respect to production country. For example, the association between alcohol content and price is larger in Norway and Germany than in most of the other production countries in the data.
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Forfattere
Sidhi Soman Agnethe Christiansen Roman Florinski Girija Bharat Eirik Hovland Steindal Luca Nizzetto Paromita ChakrabortySammendrag
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1. We propose that the ecological resilience of communities to permanent changes of the environment can be based on how variation in the overall abundance of individuals affects the number of species. Community sensitivity is defined as the ratio between the rate of change in the log expected number of species and the rate of change in the log expected number of individuals in the community. High community sensitivity means that small changes in the total abundance strongly impact the number of species. Community resistance is the proportional reduction in expected number of individuals that the community can sustain before expecting to lose one species. A small value of community resistance means that the community can only endure a small reduction in abundance before it is expected to lose one species. 2. Based on long-term studies of four bird communities in European deciduous forests at different latitudes large differences were found in the resilience to environmental perturbations. Estimating the variance components of the species abundance distribution revealed how different processes contributed to the community sensitivity and resistance. Species heterogeneity in the population dynamics was the largest component, but its proportion varied among communities. Species-specific response to environmental fluctuations was the second major component of the variation in abundance. 3. Estimates of community sensitivity and resistance based on data only from a single year were in general larger than those based on estimates from longer time series. Thus, our approach can provide rapid and conservative assessment of the resilience of communities to environmental changes also including only short-term data. 4. This study shows that a general ecological mechanism, caused by increased strength of density dependence due to reduction in resource availability, can provide an intuitive measure of community resilience to environmental variation. Our analyses also illustrate the importance of including specific assumptions about how different processes affect community dynamics. For example, if stochastic fluctuations in the environment affect all species in a similar way, the sensitivity and resistance of the community to environmental changes will be different from communities in which all species show independent responses.
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Atle Wehn HegnesSammendrag
This book analyses the implementation and challenges of using Geographical Indications in Norway. Adapting the modern and global system of Geographical Indications (GIs) to food cultures is a recurring challenge. This text uses Norway as a case study to describe, understand, and explain the socio-cultural adaptation of GIs. The empirical analysis shows that administrators, producers, consultants, and others make a significant effort to adapt the scheme to Norwegian food culture and the food culture to the scheme. Through the development and use of a new conceptual framework, the book continues to show how adaptations occurred and their influence on the development of the Norwegian food culture. The author also reflects upon the status of Norwegian GIs in emerging food cultural contexts related to sustainable and technology change. In summary, this book exhibits the connection between modern global legislative arrangements and traditional local products, providing a springboard for further research on cultural adaptation work of GIs in established and future global food cultures. This book will be of interest to researchers, policymakers, and students in agri-food studies, sociology of food and agriculture, agricultural and rural development, and cultural studies.
2023
Forfattere
Adam Eindride Naas Lasse Torben Keetz Rune Halvorsen Peter Horvath Trond Simensen Ida Marielle Mienna Anders BrynSammendrag
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