Today, the Workshop was happy to host Scott Barrett (Earth Institute and SIPA, Columbia Univ.), who presented very interesting experimental work, exploring conditions under which parties might be expected to cooperate or defect under conditions of either gradual or abrupt climate change. He and his co-author's rather simple, and in some respects admittedly unrealistic model, provided surprisingly robust and consistent (with theory) results.
Scott was also kind enough to take over my Climate Law & Policy class for the day. Like me, he tends to be short-run pessimistic and longer-run slightly less pessimistic. I hadn't seen him for at least a couple of years, and it was good to catch up.