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  1. Book ; Online: Hormones and Economic Behavior

    Brañas-Garza, Pablo / Brañas-Garza, Pablo / Neyse, Levent / Voracek, Martin / Schmidt, Ulrich / Capra, Monica

    2019  

    Keywords Science: general issues ; Neurosciences ; Hormones ; Testosterone ; cortisol ; finance ; decision-making
    Size 1 electronic resource (211 pages)
    Publisher Frontiers Media SA
    Document type Book ; Online
    Note English ; Open Access
    HBZ-ID HT021230047
    ISBN 9782889457359 ; 2889457354
    Database ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

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  2. Article: Parents' knowledge and predictions about the age of menarche: experimental evidence from Honduras.

    Accerenzi, Michela / Brañas-Garza, Pablo / Jorrat, Diego

    Archives of public health = Archives belges de sante publique

    2023  Volume 81, Issue 1, Page(s) 20

    Abstract: Background: Access to accurate, timely and age-appropriate information about menarche is an essential part of menstrual health. Reliable evidence shows that girls primarily obtain information from their mothers and/or other female family members, ... ...

    Abstract Background: Access to accurate, timely and age-appropriate information about menarche is an essential part of menstrual health. Reliable evidence shows that girls primarily obtain information from their mothers and/or other female family members, therefore, it is important to determine parents' knowledge and their predictions about other parents' knowledge of the age of menarche.
    Methods: To this end, we performed a pre-registered study with data collected from 360 households in Santa Rosa de Copán, Honduras. We implemented a novel procedure to avoid social desirability bias whereby participants answered two separated questions: i) their knowledge about the age of menarche (self-report) and ii) to predict or guess the modal response of the other participants regarding the same question (modal guess). Participants were paid according to accuracy. Both questions appeared randomly in the survey.
    Results: Recent studies indicate the age of menarche at 12 years old and 56.11% of the sample gave the same response while 62.78% hit the modal value. We estimated the impact of different sociodemographic variables and found only marginal differences. Interestingly, people with formal education and women tend to respond with lower predictions.
    Conclusion: Parents' knowledge about the age of menarche is high in the study area. The study also found that there was no social desirability bias.
    Language English
    Publishing date 2023-02-10
    Publishing country England
    Document type Journal Article
    ZDB-ID 1117688-x
    ISSN 2049-3258 ; 0778-7367 ; 0003-9578
    ISSN (online) 2049-3258
    ISSN 0778-7367 ; 0003-9578
    DOI 10.1186/s13690-023-01030-5
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    Zs.A 147: Show issues Location:
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  3. Article ; Online: Parents' knowledge and predictions about the age of menarche

    Michela Accerenzi / Pablo Brañas-Garza / Diego Jorrat

    Archives of Public Health, Vol 81, Iss 1, Pp 1-

    experimental evidence from Honduras

    2023  Volume 9

    Abstract: Abstract Background Access to accurate, timely and age-appropriate information about menarche is an essential part of menstrual health. Reliable evidence shows that girls primarily obtain information from their mothers and/or other female family members, ...

    Abstract Abstract Background Access to accurate, timely and age-appropriate information about menarche is an essential part of menstrual health. Reliable evidence shows that girls primarily obtain information from their mothers and/or other female family members, therefore, it is important to determine parents’ knowledge and their predictions about other parents’ knowledge of the age of menarche. Methods To this end, we performed a pre-registered study with data collected from 360 households in Santa Rosa de Copán, Honduras. We implemented a novel procedure to avoid social desirability bias whereby participants answered two separated questions: i) their knowledge about the age of menarche (self-report) and ii) to predict or guess the modal response of the other participants regarding the same question (modal guess). Participants were paid according to accuracy. Both questions appeared randomly in the survey. Results Recent studies indicate the age of menarche at 12 years old and 56.11% of the sample gave the same response while 62.78% hit the modal value. We estimated the impact of different sociodemographic variables and found only marginal differences. Interestingly, people with formal education and women tend to respond with lower predictions. Conclusion Parents’ knowledge about the age of menarche is high in the study area. The study also found that there was no social desirability bias.
    Keywords Age of menarche ; Self-report ; Guessing ; Prediction accuracy ; Public aspects of medicine ; RA1-1270
    Subject code 300
    Language English
    Publishing date 2023-02-01T00:00:00Z
    Publisher BMC
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Book ; Online: The role of unobservable characteristics in friendship network formation

    Brañas-Garza, Pablo / Ductor, Lorenzo / Kovárík, Jaromír

    2022  

    Abstract: Inbreeding homophily is a prevalent feature of human social networks with important individual and group-level social, economic, and health consequences. The literature has proposed an overwhelming number of dimensions along which human relationships ... ...

    Abstract Inbreeding homophily is a prevalent feature of human social networks with important individual and group-level social, economic, and health consequences. The literature has proposed an overwhelming number of dimensions along which human relationships might sort, without proposing a unified empirically-grounded framework for their categorization. We exploit rich data on a sample of University freshmen with very similar characteristic - age, race and education- and contrast the relative importance of observable vs. unobservables characteristics in their friendship formation. We employ Bayesian Model Averaging, a methodology explicitly designed to target model uncertainty and to assess the robustness of each candidate attribute while predicting friendships. We show that, while observable features such as assignment of students to sections, gender, and smoking are robust key determinants of whether two individuals befriend each other, unobservable attributes, such as personality, cognitive abilities, economic preferences, or socio-economic aspects, are largely sensible to the model specification, and are not important predictors of friendships.
    Keywords Economics - General Economics
    Subject code 338
    Publishing date 2022-06-27
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article ; Online: Hyper-altruistic behavior vanishes with high stakes.

    Brañas-Garza, Pablo / Jorrat, Diego / Kovářík, Jaromír / López, María C

    PloS one

    2021  Volume 16, Issue 8, Page(s) e0255668

    Abstract: Using an incentivized experiment with statistical power, this paper explores the role of stakes in charitable giving of lottery prizes, where subjects commit to donate a fraction of the prize before they learn the outcome of the lottery. We study three ... ...

    Abstract Using an incentivized experiment with statistical power, this paper explores the role of stakes in charitable giving of lottery prizes, where subjects commit to donate a fraction of the prize before they learn the outcome of the lottery. We study three stake levels: 5€ (n = 177), 100€ (n = 168), and 1,000€ (n = 171). Although the donations increase in absolute terms as the stakes increase, subjects decrease the donated fraction of the pie. However, people still share roughly 20% of 1,000€, an amount as high as the average monthly salary of people at the age of our subjects. The number of people sharing 50% of the pie is remarkably stable across stakes, but donating the the whole pie-the modal behavior in charity-donation experiments-disappears with stakes. Such hyper-altruistic behavior thus seems to be an artifact of the stakes typically employed in economic and psychological experiments. Our findings point out that sharing with others is a prevalent human feature, but stakes are an important determinant of sharing. Policies promoted via prosocial frames (e.g., stressing the effects of mask-wearing or social distancing on others during the Covid-19 pandemic or environmentally-friendly behaviors on future generations) may thus be miscalibrated if they disregard the stakes at play.
    MeSH term(s) Altruism ; Female ; Gift Giving ; Humans ; Male ; Students/psychology ; Young Adult
    Language English
    Publishing date 2021-08-25
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2267670-3
    ISSN 1932-6203 ; 1932-6203
    ISSN (online) 1932-6203
    ISSN 1932-6203
    DOI 10.1371/journal.pone.0255668
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  6. Article ; Online: Culture and group-functional punishment behaviour.

    Espín, Antonio M / Brañas-Garza, Pablo / Gamella, Juan F / Herrmann, Benedikt / Martín, Jesús

    Evolutionary human sciences

    2022  Volume 4, Page(s) e35

    Abstract: Humans often 'altruistically' punish non-cooperators in one-shot interactions among genetically unrelated individuals. This poses an evolutionary puzzle because altruistic punishment enforces cooperation norms that benefit the whole group but is costly ... ...

    Abstract Humans often 'altruistically' punish non-cooperators in one-shot interactions among genetically unrelated individuals. This poses an evolutionary puzzle because altruistic punishment enforces cooperation norms that benefit the whole group but is costly for the punisher. One key explanation is that punishment follows a social-benefits logic: it is eminently normative and group-functional (drawing on cultural group selection theories). In contrast, mismatch-based deterrence theory argues that punishment serves the individual-level function of deterring mistreatment of oneself and one's allies, hinging upon the evolved human coalitional psychology. We conducted multilateral-cooperation experiments with a sample of Spanish Romani people (
    Language English
    Publishing date 2022-08-01
    Publishing country England
    Document type Journal Article
    ISSN 2513-843X
    ISSN (online) 2513-843X
    DOI 10.1017/ehs.2022.32
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Continuous and binary sets of responses differ in the field.

    Rivera-Garrido, Noelia / Ramos-Sosa, M P / Accerenzi, Michela / Brañas-Garza, Pablo

    Scientific reports

    2022  Volume 12, Issue 1, Page(s) 14376

    Abstract: This paper conducts a pre-registered study aimed to compare binary and continuous set of responses in survey questionnaires. Binary responses consist of two possible opposing response options (Yes/No). Continuous responses are numerical, where ... ...

    Abstract This paper conducts a pre-registered study aimed to compare binary and continuous set of responses in survey questionnaires. Binary responses consist of two possible opposing response options (Yes/No). Continuous responses are numerical, where respondents can indicate an option on a 0-10 horizontal blind line. We study whether feasible sets of binary and continuous responses yield the same outcome (distribution) and have the same cost (duration in minutes). We collect data from 360 households in Honduras that were randomly assigned to Yes/No questions or given a slider (0-10 visual scale) to mark their responses, therefore, we provide causal evidence. We find that respondents are 13% more likely to respond "Yes" and spend 2.1 min less in the binary setting. Additionally, the results suggest that the type of question matters.
    MeSH term(s) Family Characteristics ; Honduras ; Surveys and Questionnaires
    Language English
    Publishing date 2022-08-23
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-022-17907-4
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  8. Article ; Online: Triadic influence as a proxy for compatibility in social relationships.

    Ruiz-García, Miguel / Ozaita, Juan / Pereda, María / Alfonso, Antonio / Brañas-Garza, Pablo / Cuesta, José A / Sánchez, Angel

    Proceedings of the National Academy of Sciences of the United States of America

    2023  Volume 120, Issue 13, Page(s) e2215041120

    Abstract: Networks of social interactions are the substrate upon which civilizations are built. Often, we create new bonds with people that we like or feel that our relationships are damaged through the intervention of third parties. Despite their importance and ... ...

    Abstract Networks of social interactions are the substrate upon which civilizations are built. Often, we create new bonds with people that we like or feel that our relationships are damaged through the intervention of third parties. Despite their importance and the huge impact that these processes have in our lives, quantitative scientific understanding of them is still in its infancy, mainly due to the difficulty of collecting large datasets of social networks including individual attributes. In this work, we present a thorough study of real social networks of 13 schools, with more than 3,000 students and 60,000 declared positive and negative relationships, including tests for personal traits of all the students. We introduce a metric-the "triadic influence"-that measures the influence of nearest neighbors in the relationships of their contacts. We use neural networks to predict the sign of the relationships in these social networks, extracting the probability that two students are friends or enemies depending on their personal attributes or the triadic influence. We alternatively use a high-dimensional embedding of the network structure to also predict the relationships. Remarkably, using the triadic influence (a simple one-dimensional metric) achieves the best accuracy, and adding the personal traits of the students does not improve the results, suggesting that the triadic influence acts as a proxy for the social compatibility of students. We postulate that the probabilities extracted from the neural networks-functions of the triadic influence and the personalities of the students-control the evolution of real social networks, opening an avenue for the quantitative study of these systems.
    MeSH term(s) Social Interaction ; Humans ; Social Networking ; Students ; Neural Networks, Computer ; Personality ; Spain ; Male ; Female ; Adolescent ; Schools ; Friends
    Language English
    Publishing date 2023-03-22
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 209104-5
    ISSN 1091-6490 ; 0027-8424
    ISSN (online) 1091-6490
    ISSN 0027-8424
    DOI 10.1073/pnas.2215041120
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 1148: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
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  9. Article: Self-identified Obese People Request Less Money: A Field Experiment.

    Proestakis, Antonios / Brañas-Garza, Pablo

    Frontiers in psychology

    2016  Volume 7, Page(s) 1454

    Abstract: Empirical evidence suggests that obese people are discriminated in different social environments, such as the work place. Yet, the degree to which obese people are internalizing and adjusting their own behavior as a result of this discriminatory behavior ...

    Abstract Empirical evidence suggests that obese people are discriminated in different social environments, such as the work place. Yet, the degree to which obese people are internalizing and adjusting their own behavior as a result of this discriminatory behavior has not been thoroughly studied. We develop a proxy for measuring experimentally the "self-weight bias" by giving to both self-identified obese (
    Language English
    Publishing date 2016-09-23
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2563826-9
    ISSN 1664-1078
    ISSN 1664-1078
    DOI 10.3389/fpsyg.2016.01454
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  10. Article ; Online: Continuous and binary sets of responses differ in the field

    Noelia Rivera-Garrido / M. P. Ramos-Sosa / Michela Accerenzi / Pablo Brañas-Garza

    Scientific Reports, Vol 12, Iss 1, Pp 1-

    2022  Volume 10

    Abstract: Abstract This paper conducts a pre-registered study aimed to compare binary and continuous set of responses in survey questionnaires. Binary responses consist of two possible opposing response options (Yes/No). Continuous responses are numerical, where ... ...

    Abstract Abstract This paper conducts a pre-registered study aimed to compare binary and continuous set of responses in survey questionnaires. Binary responses consist of two possible opposing response options (Yes/No). Continuous responses are numerical, where respondents can indicate an option on a 0–10 horizontal blind line. We study whether feasible sets of binary and continuous responses yield the same outcome (distribution) and have the same cost (duration in minutes). We collect data from 360 households in Honduras that were randomly assigned to Yes/No questions or given a slider (0–10 visual scale) to mark their responses, therefore, we provide causal evidence. We find that respondents are 13% more likely to respond “Yes” and spend 2.1 min less in the binary setting. Additionally, the results suggest that the type of question matters.
    Keywords Medicine ; R ; Science ; Q
    Language English
    Publishing date 2022-08-01T00:00:00Z
    Publisher Nature Portfolio
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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