24 papers · ranked by Valyu relevance
Enrico G. De Giorgi, Ola Mahmoud
Diversification represents the idea of choosing variety over uniformity. Within the theory of choice, desirability of diversification is axiomatized as preference for a convex combination of choices that are equivalently ranked. This corresponds to the notion of risk aversion when one assumes the…
Nicolai M. Nürk, H. Peter Linder, Renske E. Onstein, Matthew J. Larcombe + 14 more
Understanding how and why rates of evolutionary diversification vary is a central issue in evolutionary biology and ecology. The concept of adaptive radiation has attracted much interest, but is metaphorical and verbal in nature, making it difficult to quantitatively compare different evolutionary lineages or…
Xiangxin He, Fangda Liu, Ruodu Wang
Portfolio diversification is a cornerstone of modern finance, while risk aversion is central to decision theory; both concepts are long-standing and foundational. We investigate their connections by studying how different forms of diversification correspond to notions of risk aversion. We focus on the classical…
Gilles Boevi Koumou
The conventional wisdom of mean-variance (MV) portfolio theory asserts that the nature of the relationship between risk and diversification is a decreasing asymptotic function, with the asymptote approximating the level of portfolio systematic risk or undiversifiable risk. This literature assumes that investors hold an…
Nick James, Max Menzies, Georg A. Gottwald
We study how to assess the potential benefit of diversifying an equity portfolio by investing within and across equity sectors. We analyse 20 years of US stock price data, which includes the global financial crisis (GFC) and the COVID-19 market crash, as well as periods of financial stability, to determine the 'all…
Ferede Mengistie Alemu
In Ethiopia, rural households are under risk in the sustainability of sources of income and forced to involve in diversified livelihoods because of the uncertain nature of the agricultural sector. Therefore, the aim of the study is to measure the livelihood diversification strategies and its impacts on rural…
Matthew B. Roscher, Hampus Eriksson, Daykin Harohau, Senoveva Mauli + 3 more
'Jeremie Kaltavara' 'Wiebren J. Boonstra' 'Jan van der Ploeg'] Livelihood diversification has become an integral focus of policies and investments aiming to reduce poverty, vulnerability, and pressure on fishery resources in coastal communities around the globe. In this regard, coastal fisheries in the Pacific Islands…
María Isabel Mujica, María Fernanda Pérez, Gustavo Burin, Tiago Quental
Most of plant species have mycorrhizas, which can be classified in four types: Arbuscular (AM), Ecto (EM), Orchid (OM) and Ericoid Mycorrhiza (ER). Since the AM ancestral state, some plant lineages have switched partner (EM, OM and ER) or lost the association (NM). Evolutionary transitions to a novel mycorrhizal state…
Charles Shaw
We relax a number of assumptions in Alexeev and Tapon (2012) in order to account for non-normally distributed, skewed, multi-regime, and leptokurtic asset return distributions. We calibrate a Markov-modulated L´evy process model to equity market data to demonstrate the merits of our approach, and show that the…
Nusrat Habib, Anoma Ariyawardana, Ammar Abdul Aziz
Livelihood diversification is an essential strategy for managing economic and environmental shocks and reducing rural poverty in developing countries. This article presents a comprehensive two-part literature review on livelihood capital and livelihood diversification strategies. Firstly, it identifies the role of…
D. Beillouin, T. Ben-Ari, E. Malézieux, V. Seufert + 1 more
Increasing the diversity of cultivated crops, species or cultivars is expected to help preserve biodiversity and enhance ecosystem services in agricultural landscapes. But individual local experiments evaluating crop diversification practices and even meta-analytical synthesis of experimental studies are scattered in…
Huichen Jiang, Liyan Han
We collected data pertaining to Chinese listed commercial banks from 2008 to 2016 and found that the competition between banks is becoming increasingly fierce. Commercial banks have actively carried out diversification strategies for greater returns, and the financial reports show that profits are increasingly coming…
Libin Yang, William Rea, Alethea Rea
We present four methods of assessing the diversification potential within a stock market, two of these are based on principal component analysis. They were applied to the Australian stock exchange for the years 2000 to 2014 and all show a consistent picture. The potential for diversification declined almost…
Authors not listed
Chemical language models, such as transformers trained on SMILES strings, are increasingly used in drug design and have faced rapid growth in both model capacity and training dataset size. The impact of this scaling on practical downstream performance remains unclear, however. We systematically evaluate how model size…
Felix Kaspar, Margarita Seeger, Sarah Westarp, Christoph Köllmann + 8 more
The growing demand for 4'-modified nucleoside analogs in medicinal and biological chemistry is contrasted by the challenging synthetic access to these molecules and the lack of efficient diversification strategies. Herein, we report the development of a biocatalytic diversification approach based on nucleoside…
Eric Muraille
Diversity is widely known to fuel adaptation and evolutionary processes and increase robustness at the population, species and ecosystem levels. The Neo-Darwinian paradigm proposes that the diversity of biological entities is the consequence of genetic changes arising spontaneously and randomly, without regard for…
Mounira Chniguir, Mohamed Karim Kefi, Jamel Eddine Henchiri
The objective of this paper is to measure the degree of home bias (HB) within holdings portfolio and to identify their determining factors. By following literature and an international capital asset pricing model, we have chosen quite a number of susceptible factors that impact HB. This model is, hence, estimated for…
Kathryn Turner, Claire M. Lorts, Asnake T. Haile, Jesse R. Lasky
Biodiversity can affect the properties of groups of organisms, such as ecosystem function and the persistence of colonizing populations. Genomic data offer a newly available window to diversity, complementary to other measures like taxonomic or phenotypic diversity. We tested whether native genetic diversity in field…
S. Ben M’Barek, P. Karisto, W. Abdedayem, M. Laribi + 4 more
Mixtures of cultivars with contrasting levels of disease resistance can suppress infectious diseases in wheat, as demonstrated in numerous field experiments. Most studies focused on airborne pathogens in bread wheat, while splash-dispersed pathogens have received less attention, and no studies have been conducted in…
John Halford-McGuff, Thomas Richardson, Aidan McKay, Frederik Peschke + 2 more
We report the synthesis of germanyl triazoles formed via a copper-catalysed azide-alkyne cycloaddition (CuAAC) of germanyl alkynes. The reaction is functional group tolerant and compatible with complex molecules. Installation of the Ge moeity enables further diversification of the triazole products, including…
Zhijie Zhang, Yanjie Liu, Caroline Brunel, Mark van Kleunen
Sixty year ago, Elton proposed that diverse communities are more resistant to biological invasion. However, still little is known about which processes could drive this diversity-invasibility relationship. Here we examined whether plant-soil feedback on alien invaders is more negative when the soil originates from…
Authors not listed
We present a chemical framework in which adaptive organization is achieved by tuning a gated quantum resonator (adaptive genomic resonator) {driven quantum oscillator} across a driven, dissipative reaction manifold (fitness landscape) {Hamiltonian potential surface}. In this view, catalytic elements set gain and phase…
Jonathan M. Chase, Brian J. McGill, Daniel J. McGlinn, Felix May + 5 more
Biodiversity is a summary variable that is influenced by the abundances and distributions of populations of multiple species. Three factors in particular combine to influence diversity measures at any given sample or scale (e.g., 32, 52, 50, 18): (1) the total numbers of individuals (N) in a community; (2) the Species…
Zachery D. Zbinden, Marlis R. Douglas, Tyler K. Chafin, Michael E. Douglas
Genetic differentiation among local groups of individuals, i.e., genetic β-diversity, is a key component of population persistence related to connectivity and isolation. However, most genetic investigations of natural populations focus on a single species, overlooking opportunities for multispecies conservation plans…