我们在巴西贝洛哈里桑塔进行了田野实验,以检验哪些政府行动有助于鼓励非正规企业注册。我们发现,信息和免除费用处理没有效果或有负面影响,而执法检查则有效但微小地提升了正规化水平。执法检查影响的局部平均处理效应估计值更大,使得正规注册的可能性从21%提高至27%。结果表明,除非强制要求,否则绝大多数非正规企业都不会正规注册,这表明正规 We conducted field experiments in Belo Horizonte, Brazil, to test which government actions helped encourage informal businesses to register. We found that the treatment of information and exclusion costs had no effect or negative impact, while enforcement inspections improved the regularization level effectively but only slightly. Estimates of the effects of law enforcement inspections on local average are larger, raising the possibility of formal registrations from 21% to 27%. The results show that the vast majority of informal enterprises do not register properly unless mandated, suggesting that formal