在许多国家，就业保护立法（EPL）对某些劳动力市场（年轻工人，妇女，非熟练工人等）面临的某些工人群体的不同规定具有提高工作性。着名的例子是出于非典型就业合同的引入（例如临时和确定的持续时间合约），这令人缓解了一些，但不是全部工人的射击限制。本文讨论了EPL不同技能的EPL变化对失业，工作流动，生产力和福利的水平和构成的影响。By using an extension of Mortensen-Pissarides’ (1994) search model where heterogeneous workers compete for the same jobs, we are able to identify several key channels through which changing firing costs for some groups of workers affects hiring and firing of all workers and, hence, may have a different impact on aggregate labor market variables than reducing firing costs across the board. Some analytical and simulation results also show that these effects of differentiated firing costs by workers’ skills may be different depending upon the initial state of the labor market.