The economics of witchcraft and the big eye effect

Witchcraft is one of the manifestations of envy. It has disruptive effects on team work. A fold catastrophe is shown to exist between the degree of envy and the productivity of the witch's victim. The big eye effect is the discontinuous dip in productivity, driven by an increase in envy. There is a cycle between envy and the productivity of the witch's victim. Witchcraft damages team work until the point at which the productivity of the witch's victim falls. When this happens, the witch's envy decreases and a recuperation to the former levels of productivity occurs. The model can be applied to improve team work management.