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Ramos Villaverde, Sergio

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0000-0001-5771-116X
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Ramos Villaverde
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Sergio
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2018 - 201912020 - 20249
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Mostrando 1 - 10 de 10
  • Miniatura
    Publicación
    The irrelevancy of the inter-trial interval on delay-discounting experiments on an animal model of ADHD
    (Elsevier, 2021-06-25) SjØberg, Espen .A.; Johansen, Espen Borgå; Ramos Villaverde, Sergio; López Tolsa Gómez, Gabriela Eugenia; Pellón Suárez de Puga, Ricardo
    Delay discounting involves choosing between a small, immediate reward, and a larger but delayed one. As the delay between choice and large reward gets longer, people with ADHD tend to become impulsive faster than controls, indicated by a switch in preference from the large to the smaller reward. Choosing the smaller reward when the larger is considered reward maximizing is labeled impulsive behaviour. It is well documented that increased delays between choice and reward affects choice preference in both humans and other animals. Other variables such as the inter-trial interval or trial length are observed to have an effect on human discounting, but their effect on discounting in other animals is largely assumed rather than tested. In the current experiment, we tested this assumption. One group of rats was exposed to increasing delays between choosing the large reward and receiving it, while another group experienced longer inter-trial intervals that were equal in length to the delays in the other group. This ensured that trial length was controlled for in delay discounting, but that the delay function and inter-trial intervals could be manipulated and measured separately. Results showed that while the delay between choice and reward caused impulsive behaviour in rats, the length of the inter-trial interval (and by extension trial length) had no impact on choice behaviour. A follow-up experiment found this to be the case even if the length of the inter-trial interval was signaled with audio cues. These results suggest that rats, and possibly animals in general, are insensitive to time between trials, and therefore cannot easily represent human counterparts on the task.
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    A study on the deployment of high-speed broadband networks in NUTS3 regions within the framework of digital agenda for Europe
    (Elsevier, 2018) Feijóo González, Claudio; Armuña, Cristina; Arenal, Alberto; Ramos Villaverde, Sergio; Gómez Barroso, José Luis
    This paper investigates the high-speed broadband situation in the EU and its prospects. It uses a deployment model to estimate the investment required to meet the Digital Agenda for Europe (DAE) broadband targets set by the European Commission in its Europe 2020 strategy at different stages: as of 2016, after expected operators’ deployment, after public subsidies and leveraged investment, and as expected in 2020. The model uses data at the NUTS3 level, which is the most granular level that has data available on the status of broadband deployment, to arrive at a coherent and comparable framework. From the different perspectives on the investment to meet DAE targets, the paper concludes on the need for an appropriate combination of incumbent and alternative operators investments, public subsidies and leveraged investments, and new investments, both public and private and non-existing as of 2016, examining their feasibility and the impact of different regulatory, technical, and policy strategies.
  • Miniatura
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    Innovation ecosystems theory revisited: The case of artificial intelligence in China
    (Elsevier, 2020-04-20) Arenal, Alberto; Armuña, Cristina; Feijoo, Claudio; Ramos Villaverde, Sergio; Xu, Zimu; Moreno, Ana
    Beyond the mainstream discussion on the key role of China in the global AI landscape, the knowledge about the real performance and future perspectives of the AI ecosystem in China is still limited. This paper evaluates the status and prospects of China's AI innovation ecosystem by developing a Triple Helix framework particularized for this case. Based on an in-depth qualitative study and on interviews with experts, the analysis section summarizes the way in which the AI innovation ecosystem in China is being built, which are the key features of the three spheres of the Triple Helix -governments, industry and academic/research institutions-as well as the dynamic context of the ecosystem through the identification of main aspects related to the flows of skills, knowledge and funding and the interactions among them. Using this approach, the discussion section illustrates the specificities of the AI innovation ecosystem in China, its strengths and its gaps, and which are its prospects. Overall, this revisited ecosystem approach permits the authors to address the complexity of emerging environments of innovation to draw meaningful conclusions which are not possible with mere observation. The results show how a favourable context, the broad adoption rate and the competition for talent and capital among regional-specialized clusters are boosting the advance of AI in China, mainly in the business to customer arena. Finally, the paper highlights the challenges ahead in the current implementation of the ecosystem that will largely determine the potential global leadership of China in this domain.
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    Retos de la IA en la era del streaming musical: un análisis desde la perspectiva de las personas creadoras
    (Universidad de Alicante, 2024-07-01) Arenal, Alberto; Armuña, Cristina; Ramos Villaverde, Sergio; Aguado, Juan Miguel; Feijoo, Claudio
    Este artículo aborda los retos que supone la Inteligencia Artificial (IA) en la industria musical desde la perspectiva de la sostenibilidad de los modelos de negocio que gestionan la creación de valor en la industria y su relación con la percepción de los compositores/letristas y los artistas intérpretes o ejecutantes, entendidos como actores clave en el proceso de creación de valor. Para se ha planteado una encuesta semiestructurada a una muestra internacional cualitativamente representativa de creadores e intérpretes, tanto profesionales como amateurs. Como principales resultados, el artículo concluye, en primer lugar, que la IA viene a intensificar algunas de las problemáticas puestas de manifiesto en la consolidación del modelo de las plataformas de streaming, en particular respecto a sus dos grandes desafíos de sostenibilidad (el desplazamiento del valor de la creación a la tecnología y la homogeneidad creciente de su inventario, con implicaciones para la diversidad cultural y la creatividad). También pone de manifiesto que la IA generativa parece tener un impacto especialmente relevante en las fases de creación y consumo, afectando a los ámbitos y posibilidades de creación de valor de los músicos, compositores e intérpretes y de las experiencias de uso y consumo de música. La perspectiva de las personas creadoras ofrece una visión que conjuga incertidumbre y pesimismo, caracterizando las innovaciones tecnológicas como acelerantes de las disfunciones del modelo de las plataformas de streaming y resultando en la eventual devaluación de la profesión artística y de la propia creatividad y la diversidad cultural. La regulación de los marcos de aplicación de la IA en este contexto y el establecimiento de un marco que facilite la capacidad de elección por parte de los usuarios entre “creatividad artificial” y “creatividad natural” por parte de la son planteadas como vías de solución parciales.
  • Miniatura
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    Giants with feet of clay: the sustainability of the business models in music streaming services
    (EPI SCP, 2022-09-24) Arenal, Alberto; Armuña, Cristina; Ramos Villaverde, Sergio; Feijoo, Claudio; Aguado, Juan Miguel
    This paper examines the sustainability of the recorded music industry from the perspective of music performers. Music streaming platforms, or digital music service providers (DMSPs), have changed the recorded music industry paradigm since the middle of the 2010s. Business models for performers have evolved from royalty agreements based on sales to more complex remuneration systems based on revenues from a combination of (ad-based) free and paid subscriptions. Previous research has mainly focused on the examination of the business models of streaming services from the point of view of the innovation players (digital platforms) and/or the traditional dominant intermediaries (record labels and publishers). However, not all innovation-driven transformations are sustainable. In this paper, we argue that the sustainability of the main business models in the music industry demands the consideration of the performers´ perspective. We combine a qualitative approach with primary and secondary data sources to investigate the sustainability of existing trends of business models and business practices for different categories of performers, including both monetary values and a description of how revenues are shared. We conclude that DMSPs foster an asymmetric value chain in which the creative players barely capture value while technology-based innovations increase the capability of DMSPs to generate and capture value. Finally, we outline some alternative business models looking for the long-term sustainability of the digital music marketplace.
  • Miniatura
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    From stand-up to start-up: exploring entrepreneurship competences and STEM women’s intention
    (Springer Nature, 2020-01-04) Armuña, Cristina; Ramos Villaverde, Sergio; Juan, Jesús; Feijoo, Claudio; Arenal, Alberto
    This study seeks to explore the relationship between entrepreneurship competencies and intention (EI) of a sample of potential STEM entrepreneurs in order to assess the conventional assumption on women exhibiting lower rates of entrepreneurship intention than men and that the lack of competence perceived is a higher barrier to be an entrepreneur for them. The model used for the analysis takes as reference the Entrepreneurship Competences Framework (EntreComp) proposed by the European Commission (EC) as a common guide to inspire entrepreneurship education. Data gathering is based on a structured questionnaire. The conducted analysis uses Student’s t test means comparison and factor analysis to define the model of competences, and a multiple regression model to study the relationship between competences and skill factors in EI. Findings do not validate the hypothesis that women have fewer entrepreneurship intentions than men. Also, slight differences on the self-perceived competences are obtained by gender. In addition, the study confirms the hypothesis of a positive relationship between competences and EI, but here gender is not a moderating factor. Results are expected to contribute to the entrepreneurship competences debate and provide useful insights of application in entrepreneurship education with orientation towards the business creation.
  • Miniatura
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    Digital transformation, blockchain, and the music industry: A review from the perspective of performers’ collective management organizations
    (Elsevier, 2024-09) Arenal, Alberto; Armuña, Cristina; Ramos Villaverde, Sergio; Feijoo, Claudio; Aguado, Juan Miguel
    This study examines the challenges related to the music industry's digital transformation and potential role of blockchain from the perspective of collective management organizations (CMOs). Building on desk research and primary data from semi-structured surveys conducted with C-level executives and managers, this empirical analysis identifies major projects, their state of development, and prospects for digital transformation based on blockchain in the music industry. The findings reveal that there are a limited number of blockchain projects led by and/or with the relevant participation of CMOs. However, most are just research projects, proofs of concept, or pilots, showing that blockchain is currently in an experimental phase of development on the periphery of the music industry's digital transformation. This is not very different from analysts' understanding of the current situation and perspectives on the mass adoption of blockchain in other industries. In summary, blockchain is neither at the core of the music industry's digital transformation nor a priority for CMOs leading this process from the perspective of intellectual property rights management. The limited quality of music metadata, sparsity of sound data sources, and absence of a common data governance framework among different stakeholders within the industry are the main impediments to transforming blockchain into a global solution with transformative potential. Overall, the results provide a snapshot of the current status and possible future trajectories of blockchain adoption as a paradigm for intellectual property rights exchange within the music industry.
  • Miniatura
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    Entrepreneurship policy agenda in the European Union: A text mining perspective
    (Wiley, 2021-04-08) Arenal, Alberto; Feijoo, Claudio; Moreno, Ana; Ramos Villaverde, Sergio; Armuña, Cristina
    This study analyzes the learning curve in the emergence and development of an entrepreneurship policy in the European Union (EU) during the period 1990–2016 by identifying the key topics in the policy agenda setting and their evolution over time within a corpus of 576 selected policy-making documents. To this end, the study uses a combination of text mining techniques, cluster analysis, and qualitative assessment, which illustrate the possibilities of these tools to learn about the evolution of the policy cycle in a particular domain. The results from the analysis display three main stages, each of which have two substages. During the initial period, which lasted up until the late 1990s, labelled (i) latent EU entrepreneurship policy, there were hardly any specific entrepreneurship policy initiatives and only some general enterprise-fostering policies at the EU level which included, tangentially, SMEs and entrepreneurs. In the (ii) emergent EU entrepreneurship policy stage, which can be traced from the late 1990s to the early 2010s, saw the initial steps of an entrepreneurship policy with a main focus on diagnosis of the entrepreneurial ecosystem and some measures of support, mainly to SMEs. The third and last period to date, which began in the 2010s is a (iii) new normal for EU entrepreneurship policy, which is a more targeted stage aimed at promoting not only the quantity but also quality of business ventures. Overall, this study provides a complete overview of the EU entrepreneurship policy evolution and concludes with a granular proposal for its continued development, while identifying main themes and foundational concepts, establishing patterns, and finding temporal and contextual relations within the EU policy cycle.
  • Miniatura
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    An assessment of estimation models and investment gaps for the deployment of high-speed broadband networks in NUTS3 regions to meet the objectives of the European Gigabit Society
    (Elsevier, 2021-07) Ferrandis, Jesús; Ramos Villaverde, Sergio; Feijóo, Claudio
    This paper analyses the deployment of high-speed broadband networks in the European Union (EU). Its aim is to assess the investment required to meet the targets set by the European Commission (EC) for 2025, within the framework of the European Gigabit Society (EGS). This plan aims to ensure the availability and take-up of very high-capacity fixed and wireless networks, in both urban and rural areas, among households and the main socio-economic drivers. The estimation model presented here uses a methodology supported by data at the local (NUTS3) level to give a bottom-up estimation of the investment gap for each of the EGS objectives, using three different scenarios depending on the mix of wired and wireless technologies offered. The methodology and estimation model used in the paper are examined against other examples and assumptions available in the literature. We also offer a dynamic perspective on the analysis of the evolution of this investment gap over the years 2017–2019, which includes an assessment of the usefulness of these estimation models. The paper concludes by identifying the need for new measures to attract investment from public and private sources, mostly in rural areas, since purely market-driven initiatives fall short by about two-thirds of the required total investment. We also highlight how estimation models, despite their apparent complexity and number of assumptions, have a proven capacity to provide sufficiently accurate figures to guide policy action at the local, regional, national and supra-national levels. The usefulness of these estimation models could be enhanced by the availability of homogeneous and stable information on socio-demographics and on the level of coverage and take-up of broadband networks, at least at NUTS3 level.
  • Miniatura
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    An academic perspective on the entrepreneurship policy agenda: themes, geographies and evolution
    (Emerald Publishing, 2020-02-18) Arenal, Alberto; Feijoo, Claudio; Moreno, Ana; Armuña, Cristina; Ramos Villaverde, Sergio
    Purpose Academic research into entrepreneurship policy is particularly interesting due to the increasing relevance of the topic and since knowledge about the evolution of themes in this field is still rather limited. The purpose of this paper is to analyse the key concepts, topics, trends and shifts that have shaped the entrepreneurship policy research agenda during the period 1990–2016. Design/methodology/approach This paper uses text mining techniques, cluster analysis and complementary bibliographic data to examine the evolution of a corpus of 1,048 academic papers focused on entrepreneurship-related policies and published during the period 1990–2016 in ten relevant journals. In particular, the paper follows a standard text mining workflow: first, as text is unstructured, content requires a set of pre-processing tasks and then a stemming process. Then, the paper examines the most repeated concepts within the corpus, considering the whole period 1990–2016 and also in five-year terms. Finally, the paper conducts a k-means clustering to divide the collection of documents into coherent groups with similar content. The analyses in the paper also include geographical particularities considering three regional sub-corpora, distinguishing those articles authored in the European Union (EU), the USA and South and Eastern Asia, respectively. Findings Results of the analysis show that inclusion, employment and regulation-related papers have largely dominated the research in the field, evolving from an initial classical approach to the relationship between entrepreneurship and employment to a wider, multidisciplinary perspective, including the relevance of management, geographies and narrower topics such as agglomeration economics or internationalisation instead of the previous generic sectorial approaches. The text mining analysis also reveals how entrepreneurship policy research has gained increasing attention and has become both more open, with a growing cooperation among researchers from different affiliations, and more sophisticated, with concepts and themes that moved the research agenda forward, closer to the priorities of policy implementation. Research limitations/implications The paper identifies main trends and research gaps in the field of entrepreneurship policy providing actionable knowledge by presenting the spectrum of both over-explored and understudied research themes in the field. In practical terms the results of the text mining analysis can be interpreted as a compass to navigate the entrepreneurship policy research agenda. Practical implications The paper presents the heterogeneity of topics under research in the field, reinforcing the concept of entrepreneurship as a multidisciplinary and dynamic domain. Therefore, the definition and adoption of a certain policy agenda in entrepreneurship should consider multiple aspects (needs, objectives, stakeholders, expected outputs, etc.) to be comprehensive and aligned with its complexity. In addition, the paper shows how text mining techniques could be used to map the research activity in a particular field, contributing to the challenge of linking research and policy. Originality/value The exploratory nature of text mining allows us to obtain new knowledge and reveals hidden patterns from large quantities of documents/text data, representing an opportunity to complement other qualitative reviews. In this sense, the main value of this paper is not to advise on the future configuration of entrepreneurship policy as a research topic, but to unwrap the past by unveiling how key themes of the entrepreneurship policy research agenda have emerged, evolved and/or declined over time as a foundation on which to build further developments.