The relationship between per capita income and a number of pollution indicators has been found to display an inverted U-shaped or downward-sloping pattern. Corruption may affect this relationship in two distinct ways: by raising pollution at given income levels (direct effect) and by reducing...

Production often causes pollution as a by-product. Once pollution problems become too severe, regulation is introduced by political authorities which forces the economy to make a transition to cleaner production processes. We model this transition as a change in "general purpose technology"...