cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.29041606
title: Behavioural perspectives in forex portfolio value analysis

description: This paper combines Cumulative Prospect Theory (CPT) and the Grey Clustering Algorithm (GCA) to guide the optimization of forex portfolio selection. The United States Dollar (USD) against a universe of 84 other currencies was used for portfolio value analysis using the Differential Evolution Algorithm. A total of six portfolios were constructed of which two were based on the CPT and the remaining on the GCA. The optimisation results of all constructed portfolios show that the GC-based portfolios outperformed the CPT-based portfolios. Specifically, GC Portfolio 4, comprising assets with higher CPT values in GC 1, emerged as the best-performing portfolio with a Sharpe ratio of 0.8497, significantly surpassing the highest Sharpe ratio among CPT-based portfolios (0.0206 for CPT Portfolio 2), further reinforcing the superiority of GCA in portfolio optimisation. The inclusion of the behavioural proxy in portfolio construction has a significant impact on adding value to investors' portfolios. Future research could explore refining asset selection by integrating machine learning techniques such as K-means clustering or reinforcement learning to enhance portfolio robustness. This research paper explores the integration of Cumulative Prospect Theory (CPT) and Grey Clustering Algorithm (GCA) for forex portfolio optimization. The study is significant as it introduces a behavioural finance framework that accounts for investors' cognitive biases and decision-making anomalies, which traditional portfolio models often overlook. By evaluating the performance of portfolios composed of 84 currencies, the research demonstrates the superiority of GCA-based portfolios over those based on CPT, showcasing a higher Sharpe ratio and thus a better risk-return profile. This work makes a meaningful contribution to the literature on portfolio optimization, offering new insights into behavioural finance and demonstrating the practical value of integrating behavioural proxies into asset selection. Additionally, it suggests that advanced clustering techniques like GCA can enhance the reliability of portfolio analysis, making the study relevant for investment managers and financial analysts seeking to refine their strategies in volatile and uncertain market conditions. Future research could further expand on these findings by incorporating machine learning models to improve asset selection and portfolio robustness.
DOI: 10.6084/m9.figshare.29041606.v1
title: Behavioural perspectives in forex portfolio value analysis

description: This paper combines Cumulative Prospect Theory (CPT) and the Grey Clustering Algorithm (GCA) to guide the optimization of forex portfolio selection. The United States Dollar (USD) against a universe of 84 other currencies was used for portfolio value analysis using the Differential Evolution Algorithm. A total of six portfolios were constructed of which two were based on the CPT and the remaining on the GCA. The optimisation results of all constructed portfolios show that the GC-based portfolios outperformed the CPT-based portfolios. Specifically, GC Portfolio 4, comprising assets with higher CPT values in GC 1, emerged as the best-performing portfolio with a Sharpe ratio of 0.8497, significantly surpassing the highest Sharpe ratio among CPT-based portfolios (0.0206 for CPT Portfolio 2), further reinforcing the superiority of GCA in portfolio optimisation. The inclusion of the behavioural proxy in portfolio construction has a significant impact on adding value to investors' portfolios. Future research could explore refining asset selection by integrating machine learning techniques such as K-means clustering or reinforcement learning to enhance portfolio robustness. This research paper explores the integration of Cumulative Prospect Theory (CPT) and Grey Clustering Algorithm (GCA) for forex portfolio optimization. The study is significant as it introduces a behavioural finance framework that accounts for investors' cognitive biases and decision-making anomalies, which traditional portfolio models often overlook. By evaluating the performance of portfolios composed of 84 currencies, the research demonstrates the superiority of GCA-based portfolios over those based on CPT, showcasing a higher Sharpe ratio and thus a better risk-return profile. This work makes a meaningful contribution to the literature on portfolio optimization, offering new insights into behavioural finance and demonstrating the practical value of integrating behavioural proxies into asset selection. Additionally, it suggests that advanced clustering techniques like GCA can enhance the reliability of portfolio analysis, making the study relevant for investment managers and financial analysts seeking to refine their strategies in volatile and uncertain market conditions. Future research could further expand on these findings by incorporating machine learning models to improve asset selection and portfolio robustness.
DOI: 10.15468/dl.9hj5wg
title: Occurrence Download

description: A dataset containing 34696 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Mycale",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 34696 records from 241 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0031905-260208012135463/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.3kx2bk
title: Occurrence Download

description: A dataset containing 24664 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Coccycua minuta",
 "Year is greater than or equal to 2000",
 "Year is less than or equal to 2026",
 "HasCoordinate is true"
 ]
}

 The dataset includes 24664 records from 104 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0031904-260208012135463/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.6084/m9.figshare.29209481
title: Do policy uncertainty and volatility index affect dynamic connectedness among house price, financial and commodity market indices? Evidence from TVP-VAR and quantile regression analysis

description: This study initially analyses the connectedness among five indexes representing five asset classes: equities, bonds, commodities, currencies, and housing prices. Subsequently, it analyses the influence of policy uncertainty and equity market risk on the total connectedness of assets and their impact on the significance of the home price index. A time-varying parameter vector autoregressions (TVP-VAR) model has been employed to explore the connectedness of the assets. Secondly, quantile regression is employed to gauge the impact of uncertainty and market risk in this study. The findings show that the S&P500 is the market’s most influential index. The home price index has proven sensitive to shocks from government bonds, commodities, and stock indexes across the period analyzed. Finally, findings have indicated that policy uncertainty positively influences the overall connectedness among the variables at all the quantiles. Moreover, at higher quantiles, an increase in policy uncertainty and equity-market risk decreases the net connectedness of the house price index. These findings hold significant implications for investors and policymakers in terms of diversification of portfolios and mitigating portfolio risk during periods of economic turbulence. This study demonstrates the dynamic interrelationships among five major asset classes and indicates that policy uncertainty and equity market risk significantly influence asset connectivity. Employing TVP-VAR and Bayesian quantile regression, it reveals that the S&P 500 exerts dominant market influence, whereas the house price index exhibits significant sensitivity to shocks. The results highlight the significance of uncertainty for increasing interconnectedness, providing essential insights for investors and policymakers about risk management and portfolio diversification.
DOI: 10.6084/m9.figshare.29209481.v1
title: Do policy uncertainty and volatility index affect dynamic connectedness among house price, financial and commodity market indices? Evidence from TVP-VAR and quantile regression analysis

description: This study initially analyses the connectedness among five indexes representing five asset classes: equities, bonds, commodities, currencies, and housing prices. Subsequently, it analyses the influence of policy uncertainty and equity market risk on the total connectedness of assets and their impact on the significance of the home price index. A time-varying parameter vector autoregressions (TVP-VAR) model has been employed to explore the connectedness of the assets. Secondly, quantile regression is employed to gauge the impact of uncertainty and market risk in this study. The findings show that the S&P500 is the market’s most influential index. The home price index has proven sensitive to shocks from government bonds, commodities, and stock indexes across the period analyzed. Finally, findings have indicated that policy uncertainty positively influences the overall connectedness among the variables at all the quantiles. Moreover, at higher quantiles, an increase in policy uncertainty and equity-market risk decreases the net connectedness of the house price index. These findings hold significant implications for investors and policymakers in terms of diversification of portfolios and mitigating portfolio risk during periods of economic turbulence. This study demonstrates the dynamic interrelationships among five major asset classes and indicates that policy uncertainty and equity market risk significantly influence asset connectivity. Employing TVP-VAR and Bayesian quantile regression, it reveals that the S&P 500 exerts dominant market influence, whereas the house price index exhibits significant sensitivity to shocks. The results highlight the significance of uncertainty for increasing interconnectedness, providing essential insights for investors and policymakers about risk management and portfolio diversification.
DOI: 10.3535/1hs-prb-c4k
title: Hypselostyla romblonensis (L. Pfeiffer, 1843)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/e5v-xw7-phw
title: Megalobulimus yporanganus (Ihering & Pilsbry, 1901)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/ec7-d07-tqw
title: Oxymeris areolata (Link, 1807)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/s98-6me-7qx
title: Belgrandia ionica (Schütt, 1980)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/9st-41z-xyt
title: Tropidophora unicarinata (Lamarck, 1822)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/f9p-2wp-4f8
title: Capitina schaerfiae (L. Pfeiffer, 1861)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/zpq-gtg-eep
title: Rissoina sismondiana Issel, 1869

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/69r-rgd-711
title: Hydrobiidae W. Stimpson, 1865

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/2zr-xzt-hq3
title: Nassarius coronatus (Bruguière, 1789)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/d1k-341-zt8
title: Nassarius teretiusculus (A. Adams, 1852)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/qna-t7y-00w
title: Nassarius samiae H. H. Kool, 2006

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/3z8-4q2-cc4
title: Nassarius babylonicus (R. B. Watson, 1882)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/7rf-hm8-8cf
title: †Nassarius reticosus (J. Sowerby, 1815)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/va6-et3-4md
title: Nassarius elegantissimus Shuto, 1969

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/skk-4zt-mrm
title: Nassarius reeveanus (Dunker, 1847)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/gxj-g11-3q6
title: Nassarius provulgatus (P. Fischer, 1891)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/rcq-y97-2sw
title: Ilyanassa obsoleta (Say, 1822)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/mrp-cn8-zg0
title: Nassarius olomea Kay, 1979

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/wcl-9ew-2r3
title: Nassarius trinodosus (E. A. Smith, 1876)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.15468/dl.tavvca
title: Occurrence Download

description: A dataset containing 1 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Caenis cuniana",
 "DecimalLatitude is not null",
 "DecimalLongitude is not null"
 ]
}

 The dataset includes 1 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0031906-260208012135463/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.3535/59y-1g9-g7k
title: Phrontis alba (Say, 1826)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/exz-mls-kcf
title: Nassarius multivocus H. H. Kool, 2008

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/q9c-r30-6e4
title: Tritia pfeifferi (R. A. Philippi, 1844)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/7kp-vlh-d24
title: Pseudopeas Putzeys, 1899

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/9f9-fej-795
title: Subulina H. Beck, 1837

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/k3c-xt5-den
title: Subulona E. von Martens, 1889

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/pez-vjz-sdy
title: Nassarius semisulcatus (Hombron & Jacquinot, 1848)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/8jq-b0j-1lx
title: Nassarius distortus (A. Adams, 1852)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/8mh-smv-8ms
title: Nassarius scalaris (A. Adams, 1852)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/zr5-5jw-wrx
title: Nassarius graphiterus (Hombron & Jacquinot, 1848)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/023-yze-72z
title: Vertigo angustior Jeffreys, 1830

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/k56-kxa-jje
title: Tritia varicosa (W. Turton, 1825)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/fcv-619-gvz
title: Tritia corrugata (Brocchi, 1814)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/spe-wdy-bhm
title: Nassarius troendleorum Cernohorsky, 1980

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/far-s2t-x9z
title: Nassarius glans (Linnaeus, 1758)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/m8s-ctx-my9
title: Nassarius paolomeli T. Cossignani, 2018

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/0l7-wde-vaw
title: Nassarius horridus (Dunker, 1847)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/571-w0j-dtr
title: Nassarius glans (Linnaeus, 1758)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/794-tl7-5e5
title: Nassarius brunneostoma (Stearns, 1893)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/0j5-240-xe3
title: Nassarius chlorus (R. B. Watson, 1886)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/jmq-hc0-bn2
title: Bullia diluta (Krauss, 1848)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/tg1-l8a-esg
title: Nassarius humboldti Gili & H. H. Kool, 2022

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/z34-pc0-24r
title: Nassarius pullus (Linnaeus, 1758)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/9n1-6pw-ar6
title: Phrontis antillarum (A. d'Orbigny, 1847)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/w8d-nes-s7a
title: Nassarius bimaculosus (A. Adams, 1852)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/cwr-h2g-234
title: Nassarius nodicinctus (A. Adams, 1852)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/el9-367-9kx
title: Nassarius massemini H. H. Kool, 2020

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.5255/ukda-sn-858244
title: Centre for Economic Performance Survey of Self-Employment May 2022

description: This survey is the fifth round of the CEP Survey of Self-employment. It interviews approximately 1,500 self-employed in the UK. The goal is to investigate their social and financial situation after two years since the beginning of the Covid-19 crisis. The questionnaire covers topics ranging from demographics, to income and hours worked and preferences towards working arrangements.
DOI: 10.3535/nb2-9zb-lgw
title: Nassarius provulgatus (P. Fischer, 1891)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/rwd-q4f-0bb
title: Nassarius Duméril, 1805

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/a48-vn8-rdk
title: Naytia granulosa (Lamarck, 1822)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/et7-7e2-2l8
title: Nassarius festivus (Powys, 1835)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/mrg-la9-bzw
title: Nassarius Duméril, 1805

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/rla-gms-sf0
title: Nassarius obvelatus (Deshayes, 1833)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/vg7-4k6-bse
title: Nassarius Duméril, 1805

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/cvv-dnw-xr1
title: Nassarius sinusigerus (A. Adams, 1852)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/pa2-3jy-7fe
title: Nassarius subtranslucidus (E. A. Smith, 1903)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/fw2-3yz-f7x
title: Nassarius Duméril, 1805

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/w7k-p91-2vz
title: Nassarius Duméril, 1805

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/af7-0az-t3p
title: Tritia varicosa (W. Turton, 1825)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/x1x-9sv-fg4
title: Nassarius persicus (E. von Martens, 1874)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/a8v-z15-ymw
title: Tritia recidiva (E. von Martens, 1876)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/5tl-nvt-6p5
title: Nassarius nanus (A. Adams, 1852)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/wsc-y0x-prz
title: Nassarius kraussianus (Dunker, 1846)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/afz-c6a-x27
title: Nassarius Duméril, 1805

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/f96-j58-awt
title: Vitrea subrimata (Reinhardt, 1871)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/wlj-10j-jvf
title: Nassarius semisulcatus (Hombron & Jacquinot, 1848)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/q1c-pte-c59
title: Viviparus viviparus (Linnaeus, 1758)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/88w-yyn-rh7
title: Tritia caboverdensis (Rolán, 1984)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.
DOI: 10.3535/c9p-qcb-j17
title: Lindholmiola lens (A. Férussac, 1832)

description: Digital Specimen for the physical specimen hosted at Naturalis Biodiversity Center.