Some ways to ameliorate the dilemma
	• The players themselves – Internal moral rules, codes of conduct, norms… – Communication – Repetition • if the probability of continuation is “sufficiently high” then cooperation becomes an equilibrium • External solutions – Privately agreed upon 3rd party monitoring – Contract law & its enforcement by courts – International organizations (e.g., GATT, WTO) • These are all either embellishments of -- or not covered within -- the one-shot PD considered above.