The extent to which environmental regulatory institutions are either 'green' or 'brown' impacts not just the intensity of regulation at any moment, but also the incentives for the development of new pollution-control technologies. We set up a strategic model of R&D in which a polluter can deploy...

Emotions are a significant determinant of consumer behaviour. A customer may get angry if he feels that he is being treated unfairly by his supplier and that anger may make him more likely to switch to an alternative provider. We model the strategic interaction between firms that choose quality...

The desire to avoid rousing community hostility may encourage firms to behave in an environmentally responsible manner. It has been conjectured that such 'informal regulation' could effectively replace formal intervention in some settings, and usefully complement it in others. We explore these...

Altruism or `regard for others' can encourage self-restraint among generators of negative externalities, thereby mitigating the externality problem. We explore how introducing impure altruism into standard regulatory settings alters regulatory prescriptions. We show that the optimal calibration...