| 1. |
- Allentoft, Morten E., et al.
(författare)
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100 ancient genomes show repeated population turnovers in Neolithic Denmark
- 2024
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Ingår i: Nature. - 0028-0836 .- 1476-4687. ; 625, s. 329-337
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Tidskriftsartikel (refereegranskat)abstract
- Major migration events in Holocene Eurasia have been characterized genetically at broad regional scales1–4. However, insights into the population dynamics in the contact zones are hampered by a lack of ancient genomic data sampled at high spatiotemporal resolution5–7. Here, to address this, we analysed shotgun-sequenced genomes from 100 skeletons spanning 7,300 years of the Mesolithic period, Neolithic period and Early Bronze Age in Denmark and integrated these with proxies for diet (13C and 15N content), mobility (87Sr/86Sr ratio) and vegetation cover (pollen). We observe that Danish Mesolithic individuals of the Maglemose, Kongemose and Ertebølle cultures form a distinct genetic cluster related to other Western European hunter-gatherers. Despite shifts in material culture they displayed genetic homogeneity from around 10,500 to 5,900 calibrated years before present, when Neolithic farmers with Anatolian-derived ancestry arrived. Although the Neolithic transition was delayed by more than a millennium relative to Central Europe, it was very abrupt and resulted in a population turnover with limited genetic contribution from local hunter-gatherers. The succeeding Neolithic population, associated with the Funnel Beaker culture, persisted for only about 1,000 years before immigrants with eastern Steppe-derived ancestry arrived. This second and equally rapid population replacement gave rise to the Single Grave culture with an ancestry profile more similar to present-day Danes. In our multiproxy dataset, these major demographic events are manifested as parallel shifts in genotype, phenotype, diet and land use.
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| 2. |
- Allentoft, Morten E., et al.
(författare)
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Population genomics of post-glacial western Eurasia
- 2024
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Ingår i: Nature. - 0028-0836 .- 1476-4687. ; 625:7994, s. 301-311
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Tidskriftsartikel (refereegranskat)abstract
- Western Eurasia witnessed several large-scale human migrations during the Holocene1–5. Here, to investigate the cross-continental effects of these migrations, we shotgun-sequenced 317 genomes—mainly from the Mesolithic and Neolithic periods—from across northern and western Eurasia. These were imputed alongside published data to obtain diploid genotypes from more than 1,600 ancient humans. Our analyses revealed a ‘great divide’ genomic boundary extending from the Black Sea to the Baltic. Mesolithic hunter-gatherers were highly genetically differentiated east and west of this zone, and the effect of the neolithization was equally disparate. Large-scale ancestry shifts occurred in the west as farming was introduced, including near-total replacement of hunter-gatherers in many areas, whereas no substantial ancestry shifts happened east of the zone during the same period. Similarly, relatedness decreased in the west from the Neolithic transition onwards, whereas, east of the Urals, relatedness remained high until around 4,000 bp, consistent with the persistence of localized groups of hunter-gatherers. The boundary dissolved when Yamnaya-related ancestry spread across western Eurasia around 5,000 bp, resulting in a second major turnover that reached most parts of Europe within a 1,000-year span. The genetic origin and fate of the Yamnaya have remained elusive, but we show that hunter-gatherers from the Middle Don region contributed ancestry to them. Yamnaya groups later admixed with individuals associated with the Globular Amphora culture before expanding into Europe. Similar turnovers occurred in western Siberia, where we report new genomic data from a ‘Neolithic steppe’ cline spanning the Siberian forest steppe to Lake Baikal. These prehistoric migrations had profound and lasting effects on the genetic diversity of Eurasian populations.
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| 3. |
- Andersen, Poul H., et al.
(författare)
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Big-science organizations as lead users : A case study of CERN
- 2017
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Ingår i: Competition & change. - : SAGE PUBLICATIONS LTD. - 1024-5294 .- 1477-2221. ; 21:5, s. 345-363
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Tidskriftsartikel (refereegranskat)abstract
- This paper explores the role of big-science organizations in a lead-user context. Lead users are valuable for suppliers because they are active in co-developing products and foreshadowing market needs. Big-science organizations represent a special breed of co-developers, as their demands are not necessarily the avant-garde of a coming market. Yet, they may provide a valuable test bed for suppliers because they are pushing the boundaries of technological capacities and, thus, challenging suppliers' talents. They are also prestigious collaboration partners that help producers to be acknowledged as being at the forefront of technology. They are often deeply engaged in their suppliers' manufacturing and development activities, which is seen as a characteristic of the customer-active paradigm upon which the lead-user notion builds. This paper investigates whether and how interacting with the European Organization for Nuclear Research concerning their development needs may contribute to suppliers' innovation. We ask the question: What characterizes interactions with big-science organizations as a type of lead user, and how do these characteristics impact the potential innovation benefits accruing to the suppliers?
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| 4. |
- Andersen, Poul Houman, et al.
(författare)
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Corporate sustainable brand identity work and network embeddedness : Learnings from Better Place (2007-2013)
- 2023
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Ingår i: Industrial Marketing Management. - : Elsevier. - 0019-8501 .- 1873-2062. ; 115, s. 526-538
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Tidskriftsartikel (refereegranskat)abstract
- The growing attention to the climate crisis in today's business environment, increases the need for B2B firms to integrate corporate sustainable branding activities in stakeholder interactions. Motivated by a continuous push for market reforms to promote a sustainability agenda for B2B firms, this research uses an intensive single case study design to showcase how corporate sustainable brand identity work is carried out in B2B firms and how business network embeddedness affects this work. We describe how Petter Place, a company that attempted to introduce a radically new way of providing charging for electric cars, provides an opportunity to outline and discuss corporate sustainable brand identity work in B2B networks. We identify how corporate sustainable brand identity work is carried out through different sub-processes, such as building corporate sustainable brand identity and awareness, network mobilizing, and ongoing actor commitment and coalignment, and how network embeddedness facilitates and restricts these processes in different ways.
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| 5. |
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| 6. |
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| 7. |
- Andersen, Poul Houman, et al.
(författare)
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Process validation: Coping with three dilemmas in process-based single case research
- 2018
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Ingår i: Journal of Business and Industrial Marketing. - 0885-8624. ; 33:4, s. 539-549
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Tidskriftsartikel (refereegranskat)abstract
- Purpose - Recent research suggests that the interest in process-based single-case studies is increasing in business-to-business (B2B) marketing. This paper aims to discuss research validity issues and dilemmas encountered by process-based single-case researchers in B2B marketing. Design/methodology/approach - This is a methodology paper that builds on an integration of experiences, ideas and literature. Findings - In the paper, three dilemmas are suggested that researchers need to deal with in process-based single-case research. These relate to the casing process: crafting the case, communicating the case and describing the process of the study. Furthermore, process validation is suggested as a research quality concept concerned with how these dilemmas are handled. Research limitations implications - Based on the notion of process validation, the authors provide suggestions for how casing, as a process-based single-case approach, can be conveyed and advanced in its own right. Practical implications - This study can be used to convey insights that can help new and experienced researchers in conducting single-case studies in B2B. Originality/value - Coping with issues of research quality in B2B marketing is of relevance to researchers dealing with process-based single-case research and process validation issues, as well as to journal reviewers evaluating the qualities of process-based single-case research.
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| 8. |
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| 9. |
- Andersen, Poul Houman, et al.
(författare)
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Re-appraising interaction and process for industrial network research : The future plunging mirror hall metaphor
- 2020
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Ingår i: Industrial Marketing Management. - : Elsevier BV. - 0019-8501 .- 1873-2062. ; 91, s. 627-638
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Tidskriftsartikel (refereegranskat)abstract
- Constructivist and realist research is undertaken in the business relationship and network approach of the Industrial Marketing and Purchasing Group. These two divergent research perspectives seek a different form of contextual understanding vs. general knowledge. They are not incommensurable as one can gain insights from the other. But a researcher must know and understand both perspectives and sometimes be able to see when a writer is playing almost a middle ground to make a specific point. To provide a broader understanding of the ontological distinctions and their ramifications for researching and translating meanings concerning business networks we introduce the temporal mirror hall metaphor. We propose that: (i) researchers should avoid reading and understanding only a single research perspective, (ii) research is a social temporal process embedded in a research community, (iii) understanding different researcher perspectives is necessary for a constructivist scholar working in a world of realist education, and (iv) realist researchers need constructivist research to change and develop systematized theories. The paper extends specific advice to constructivist researchers undertaking longitudinal studies of interaction in business networks. Realist researchers will find intriguing the comparisons and refractions, as well as illusions, in the temporalities of the mirror hall.
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| 10. |
- Andersen, Poul Houman, et al.
(författare)
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Selling to the Base of the Pyramid
- 2013
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Ingår i: Mercury Magazine. - Uppsala : Department of Business Studies. - 2001-3272. ; :4, s. 58-63
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Tidskriftsartikel (populärvet., debatt m.m.)
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