When are groups less moral than individuals?

Individuals are less likely to make morally desirable decisions when they in groups. I study this phenomenon makes groups produce a outcome than one individual alone. formulate and test model which moral occurs if at least costly decision. Using lab experiment data from field experiments on the bystander effect, show that most individuals moral, is more be produced by individual, whereas immoral, it group. This rule not only useful for reconciling previous mixed evidence decision-making groups, but may also applied better design organizations institutions.