1,721,051 research outputs found
Histoire de l'art / Storia dell'arte
No full textBaggio M., Toso S. Histoire de l'art / Storia dell'arte. In: Mélanges de l'École française de Rome. Antiquité, tome 109, n°2. 1997. pp. 879-897
Testing donation menus: on charitable giving for cancer research - evidence from a natural field experiment
No full textBehavioral economics research has helped with understanding charitable behavior and has shown that charities can encourage donations by carefully designing their pledges. However, there is still scope to extend current research on who gives, what drives the decision to donate and at what levels, especially when behavioral insights are applied in context. In cooperation with a major Italian charity for cancer research, this study implements a natural direct mail field experiment, with over 150,000 letters sent to donors. By exploring the behavioral responses to different donation anchors, evidence was found that, within the given framework, including donation menus significantly increased the average amount donated without affecting the likelihood of donation. Furthermore, introducing additional explanations of how to make a payment significantly increased overall returns. Lastly, individual heterogeneity (high- and low-frequency donors, as well as senior and junior donors) had a direct effect on donations
Experience and history: An experimental approach to generational heterogeneity
No full textThe development and use of long-lived public goods involves
more than one demographic generation, leaving the classic literature
on voluntary provisions partially unfit to explain complex phenomena
such as welfare systems, climate policies and major infrastructure
projects.
This paper proposes a model that explains how equilibrium is
reached in a context where heterogeneity is linked to seniority and
strategic interaction is finitely repeated. Within this model the case of
intergeneration public goods production is explained using a
redistribution rule that benefits the younger players, as a
compensation for their inexperience.
Experimental evidence shows that subjects who belong to low
or middling marginal per capita return types are negatively affected by
heterogeneity, whereas groups benefit from the presence of
experienced subjects. More importantly, results show that becoming
disadvantaged (lowering the marginal per capita return of individuals
in time) has negative effects on the provision of public goods, if
compared to a situation where the disadvantage is constant in time
(same low marginal per capita return in time)
Livio come fonte per la storia dell’arte antica: linee di ricerca
No full textIl contributo intende impostare una prima riflessione sulla possibilità di indagare il testo di Tito Livio dalla prospettiva dello storico dell’arte antica, allo scopo di evidenziare tracce di un possibile rapporto con la cultura artistica romana.
In relazione al testo di Livio è bene tuttavia sottolineare sin da subito alcuni aspetti: manca una parte consistente dell’opera dello storico e, in particolare, i libri dell’età a lui contemporanea (non è possibile dunque ricorrere a quelle che possono essere delle “citazioni figurative”, comprese all’interno del testo, derivate dall’appartenenza ad un medesimo ambiente culturale); quand’anche Livio faccia riferimento ad un prodotto artistico, si tratti di pittura o di scultura, lo scrittore non ci consegna mai la descrizione dell’opera nel suo complesso, comprensiva cioè dello schema iconografico relativo ai personaggi e ai loro attributi, delle modalità di impaginazione della scena, delle caratteristiche dell’ambientazione, tutti elementi questi fondamentali per lo storico dell’arte ad istituire confronti iconografici pertinenti con il repertorio figurativo noto; solo raramente troviamo il riferimento a determinati soggetti artistici spesso comunque laconicamente indicati.
Se dunque l’analisi delle possibili suggestioni iconografiche offerte da Livio nei suoi Ab Urbe condita libri costituisce un aspetto di difficile trattazione all’interno dell’opera dello storico patavino, in linea con quelle che sono le finalità della sua produzione letteraria, tuttavia un qualche margine di intervento per lo storico dell’arte potrebbe aprirsi in alcuni particolari contesti che potremmo definire “culturali”. Per quanto riguarda Livio, sembra di capire che i riferimenti ai manufatti artistici si inseriscono sempre all’interno di una sequenza di res gestae per la ricostruzione delle quali – come indica in maniera programmatica nella Praefatio agli Ab Urbe condita libri – l’autore afferma che ciò che è salubre e fruttuoso (salubre ac frugiferum) è la possibilità di contemplare insegnamenti di ogni genere (omnis exempli documenta) sotto forma di immagini famose (in inlustri monumento), dove il monumentum può anche diventare lo strumento, l’oggetto materiale, attraverso cui si manifesta il documentum
The Anthropology of Forgery: New Themes for the Contemporary Archaeologist
No full textThe task of archaeologists is to study the material culture of the past to pass it on to current and future generations. Each object preserves a memory, deriving from its production, its use, its breaking and deposition. This memory can also be reactivated in the modern and contemporary world through trade, collecting and exhibition of various artefacts. In order to preserve and safeguard this memory, synonymous with past civilizations and as an example for present and future ones, contemporary archaeologists are called upon to study the most current trends in society in order to prevent illegal activities (such as clandestine excavations, forgeries, trafficking, theft, etc.) and to preserve the original idea of history and culture. Through a multidisciplinary approach (historical, archaeological, anthropological, legal), this contribution presents some activities undertaken by the Paduan archaeological school, focusing on the analysis of the phenomenon of falsification, its positive and negative implications, leading to a proposal for the definition of a new branch of archaeology at the service of contemporary society
Strings on NS-NS backgrounds as integrable deformations
No full textWe consider the world-sheet S matrix of superstrings on an AdS3×S3×T4 NS-NS background in uniform light-cone gauge. We argue that scattering is given by a CDD factor that is nontrivial only between opposite-chirality particles, yielding a spin-chain-like Bethe ansatz. Our proposal reproduces the spectrum of nonprotected states computed from the Wess-Zumino-Witten description and the perturbative tree-level S matrix. This suggests that the model is an integrable deformation of a free theory similar to those arising from the TT composite operator
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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