Imitative and contrarian behaviours are the two typical opposite attitudes of investors in stock markets. We introduce a simple model to investigate their interplay in a stock market where agents can take only two states, bullish or bearish. Each bullish (bearish) agent polls m 'friends' and...

Imitative and contrarian behaviors are the two typical opposite attitudes of investors in stock markets. We introduce a simple model to investigate their interplay in a stock market where agents can take only two states, bullish or bearish. Each bullish (bearish) agent polls m "friends'' and...

In this article, we focus on two types of ?aversion? which we deem essential aspects of the notion of trust: betrayal aversion (social) and ambiguity aversion (a special case of aversion to uncertainty). Based on trust-games studies in experimental economics and neuroeconomics, our main goal is...

According to an early approach, the decision to trust in the one-shot anonymous trust game is intuitively tantamount to a risky decision: the willingness to bet on the reciprocation of my investment. In a seminal study, Eckel and Wilson (2004) explored the correlation between risk attitudes (as...

In repeated trust-game offers made by investors can be attributed to strategic reciprocation-based behavior. However, when a trustee is loyal, personal trust can build up between players, in the same way that lack of positive reciprocation on the part of trustees can motivate investors'...

Différentes heuristiques ont été avancées par les psychologues et les économistes afin de rendre compte des comportements sur les marchés financiers. Elles soulignent les biais cognitifs qui affectent les croyances individuelles, et s’efforcent d’expliquer dans une certaine mesure les...

Several heuristics have been developed by economists and psychologists in order to explain economic behaviour on financial markets. They stress the cognitive bias that affect individual judgments and that partially could explain anomalies observed on financial markets. The aim of our experiment...

According to an early approach, the decision to trust in the one-shot anonymous trust game is intuitively tantamount to a risky decision: the willingness to bet on the reciprocation of my investment. In a seminal study, Eckel and Wilson (2004) explored the correlation between risk attitudes (as...

In repeated trust-game offers made by investors can be attributed to strategic reciprocation-based behavior. However, when a trustee is loyal, personal trust can build up between players, in the same way that lack of positive reciprocation on the part of trustees can motivate investors'...