Nobel laureate Paul Krugman is baffled again - he can't tell if the job market is cooling or not and doubts the Fed's next move matters much

• Paul Krugman is puzzled by the US labor market following Wednesday's jobs report. 
• The Nobel Prize-winning economist said he can't gauge whether the labor market is tight or not. 
• Meanwhile, Krugman doubts the Fed's next interest-rate move to cool a hot economy will matter much.

Nobel laureate Paul Krugman is confused again – but this time it's about the US labor market. 

"JOLTS came in ... confusing, with openings barely down but quits down substantially. So the labor market either isn't cooling or it is," the Prize-winning economist said in a Wednesday tweet.