By contrast,the model in this paper assumesthat regulators can measure service quality by incurring monitoring costs and can impose sanctions on producers in case quality is found to be inferior.

• 与此相反，本论文中的模式却认为，如果发现质量低次的服务，监管者是可以在产生监督成本的情况下对服务质量进行衡量的，也是可以对服务生产者实施惩罚的。