A note on indeterminacy of unemployment equilibrium
指出，在匹配函数规模报酬递增且采用集体谈判或效率工资时，若生产率恒定，即使使用纳什谈判解，均衡仍是唯一的，反驳了多重均衡的观点。
According to Mortensen (1989), increasing returns to scale in matching may cause multiple equilibria if collective bargaining or efficiency wage is applied. I show that a unique equilibrium exists, also if the Nash bargaining solution is used, if productivity is constant.