This paper investigates leading by example as a policy prescription for international collective action to provide summation public goods. A country leads by example by committing to a minimal level of provision, and by matching higher contributions there beyond. In an evolutionary...

Work ethics affect labour supply. This idea is modelled assuming that work is habit forming. We introduce working habits in a neoclassical growth model and compare its outcomes with a model without habit formation. In addition, we analyse the impact of different forms of technical progress. The...

This paper develops a lean-against-the-wind rule for setting low-skill immigration quota. The construction of this rule takes into account the factors governing the supply of and demand for low-skill immigrants, illegal immigration, border enforcement and the host-country's level of unemployment.

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...