債務スパイラルの懸念を否定する連ツイをクルーグマンが立てている。 Thinking about debt, and some common misconceptions. I thought I'd start with a picture that needs explaining, although it's just a new way to make a point many economists — but not many other people — already know 1/ What got me started was the mail I get every time I write about debt and the debt ceiling — stuff along the lines "you forgot to mention that debt is