English title: The Right Amount of Trust

Author(s): Jeffrey Butler - Paola Giuliano - Luigi Guiso -

Language: English

Type: Report, working paper

Year: 2009

Abstract

A vast literature has investigated the relationship between trust and aggregate economic performance. We investigate the relationship between individual trust and individual economic performance. We find that individual income is hump shaped in a continuous measure of trust beliefs. We show that heterogeneity of trust beliefs in the population, coupled with the tendency of individuals to extrapolate beliefs about others from one’s own level of trustworthiness, could generate the non-monotonic relationship between trust and income. Highly trustworthy individuals think others are like them and tend to form beliefs that are too optimistic, causing them to assume too much social risk, to be cheated more often and ultimately perform less well than those who happen to have a trustworthiness close to the mean of the population. On the other hand, the low-trustworthiness types form beliefs that are too conservative and thereby avoid being cheated, but give up profitable opportunities too often, and, consequently, perform below average. Using the European Social Survey, we find that people who trust more are cheated more often by banks, when purchasing goods second hand, when relying on the services of a plumber or a mechanic and when buying food. We complement the survey evidence with experimental evidence showing that own trustworthiness and expectations of others’ trustworthiness in a trust game are strongly correlated and that this correlation does not vanish when the game is repeated many times.

Edition: 0

Institution: European University Institute

Number of pages: 67

Number: 33

Series: EUI ECO

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