Keynes, Lucas and involuntary unemployment: a reply to Hayes
回应海耶斯对作者先前文章的批评，强调必须区分劳动力配给（市场结果）与失业（求职活动），指出经济理论主要关注前者，而失业的自愿性/非自愿性属于后者，混淆二者会导致语义混乱。
In this response to Mark Hayes's criticism of his article, 'Lucas on involuntary unemployment', the author insists on the need to draw a distinction between labour rationing (a market outcome) and unemployment (the activity of job seeking). Economic theory is mainly concerned with the former. Yet the issue of the voluntarity versus the involuntarity of unemployment pertains to unemployment as an activity. Failing to make this distinction cannot but lead to semantic confusion.