1,254 research outputs found
grandesertão.br, de Willi Bolle
No full textResenha do livro "grandesertão.br", de Willi Bolle. São Paulo: Duas Cidades/Editora 34, 2004, 478 páginas. [Coleção Espírito Crítico]
grandesertão.br, de Willi Bolle
No full textResenha do livro de Willi Bolle. grandesertáo.br. Sáo Paulo: Duas Cidades/Editora 34, 2004, 478 páginas. [Coleçáo Espírito Crítico]
Utility versus Income-Based Altruism
No full textIn Dictator Game experiments where the information status of the participants varies we find that a certain type of proposer tends to reduce his offers when the recipient has incomplete information about the pie size. We also find that a certain type of recipient tends to reject too small offers in the Impunity Game when the proposer has incomplete information about the recipient type. To explain these puzzling results we reconsider Becker's [1974] theory of altruism, which assumes that externalities are caused by other people's utility. When incomplete information about the other person is introduced, it turns out that his approach predicts – in contrast to other theories of altruism - that some altruistic persons will change their behavior as observed in our experiments. Thus, a kind of utility based altruism (and spite as its opposite form) can be assumed as the main principle governing behavior in this class of games. --
A Difficulty with Oaths: On Trust, Trustworthiness, and Signalling
No full textIn the wake of the Enron and Worldcom financial scandals that rocked Wall Street in 2002, the US government’s financial regulatory body, the Security and Exchange Commission (SEC) took the unprecedented step in June 2002 of requiring that the chief executives and chief financial officers of America’s 947 biggest companies to swear on oath that their company results and financial reports were to the best of their knowledge accurate. The one-off order was quickly followed by the passing of the Sarbanes-Oxely act, which will require many more CEOs and CFOs to certify their company reports and financial statements at regular intervals. In this paper we apply a simple signalling model to examine whether or not this type of institutional signal of trustworthiness is always efficient. We find that in the presence of signalling costs, the separating equilibrium can be socially inefficient as well as causing a general loss of trust.asymmetric information, institutional signals, oaths, risk, trust,
Solidarity, responsibility and group identity
No full textIn the Solidarity Game (Selten and Ockenfels, 1998) lucky winners of a lottery can transfer part of their income to unlucky losers. Will losers get smaller transfers if they can be assumed to be (partly) responsible for their zero income because they have chosen riskier lotteries (Trhal and Radermacher, 2009)? Or will risk-lovers and risk-averters develop group identity feelings, leading to larger transfers within, rather than between, the groups (Chen and Li, 2009, for charitable transfers between and within otherwise defined groups)? In an experiment we find behavior to be guided by in-group favoritism. Responsibility for self-inflicted neediness does not seem to play an important role. In-group/out-group behavior is successfully described by a variant of a social utility function suggested by Cappelen et al. (2010). --risky behavior,group identity,solidarity
Creare la paura. Rappresentazione dei problemi sociali e bolle mediatiche
No full textIl capitolo analizza il processo pervasivo e cumulativo di costruzione mediale dei problemi sociali, focalizzando l'attenzione sulle bolle mediatich
Homoclinics and chaotic behaviour for perturbed second order systems
No full textThis paper deals with perturbed Hamiltonian systems. The main assumption is that the unperturbed system has a homoclinic orbit which is non-degenerate in the sense that the linearized equation as a 1-dimensional kernel. If the Poincare Melnikov potential is sufficiently oscillating we construct multi-bump and also infinite-bump solutions. These ideas and results in bifurcation theory have been later used by several author
Markov techniques for signal recognition. Application to noninvasive diagnostics of fast mechanisms
No full textHomoclinics and chaotic behaviour for perturbed second order systems
No full textThis paper deals with perturbed Hamiltonian systems. The main assumption is that the unperturbed system has a homoclinic orbit which is non-degenerate in the sense that the linearized equation as a 1-dimensional kernel. If the Poincare Melnikov potential is sufficiently oscillating we construct multi-bump and also infinite-bump solutions. These ideas and results in bifurcation theory have been later used by several author
L'esperienza sociale delle "bolle"
No full textIl contributo analizza e mette a confronto gli esiti di due indagini realizzate nei primi mesi di apertura dei servizi e delle scuole dell'infanzia, dopo il lock-down imposto dalla pandemia. Attraverso l'analisi di questionari e di diari di bordo compilati da educatrici e insegnanti, viene messa a fuoco la qualità dell'esperienza sociale dei bambini in relazione alla organizzazione di sezioni-"bolle" isolate così come viene percepita appunto da educatrici e insegnanti. Su queste basi, si discutono le "pedagogie latenti" veicolate da tali percezioni e le ragioni che le ragioni che le sottendono
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