Robert Murphy has in the past tried to get Krugman to debate him:
http://www.krugmandebate.com/
This has not happened. With the May 1st Krugman AMAon Reddit, however, we might get a chance to bring this into the spotlight. We should all try to concentrate upvotes to one post to the Krugman AMA on May 1st that asks Krugman to do the debate with Murphy.
Do you like this idea?
Link to Reddit thread:
http://www.reddit.com/r/Anarcho_Capitalism/comments/t0m8g/upvote_drive_for_murphykrugman_debate/
Maybe we can get Murphy to actually delete the mountains of spam in that ghost town of a Point campaign.