Arnold Kling of EconLog talks with EconTalk host Russ Roberts about a new paradigm for thinking about macroeconomics and the labor market. Kling calls it PSST--patterns of sustainable specialization and trade. Kling rejects the Keynesian approach that emphasizes shortfalls in aggregate demand arguing that the aggregate demand approach masks the underlying complexity of the recalculations that periodically take place in a dynamic economy. Instead, Kling invokes the mutual exploration between entrepreneurs and workers for profitable opportunities that pay well using the workers' skills. This exploration takes time, involves trial and error, and can have false starts because businesses sometimes fail or employees are difficult to find or match with employment opportunities. Kling applies these ideas to the current crisis to explain why labor market recovery is so sluggish and what might policies might improve matters.