Global Climate Change: A Challenge to Policy - Kenneth Arrow
The Organisation of Economic Activity: Issues Pertinent to the Choice of Market Versus Non-Market Allocation by Kenneth Arrow. This is still one of the finest articles on market failures.
On Taxation and the Control of Externalities - William Baumol.
The Arrow Impossibility and its Implications for the State - Thomas B. Singh. These are notes, not a full-fledged article.