Who Benefits from State Corporate Tax Cuts? A Local Labor Markets Approach with Heterogeneous Firms: Comment
评论了Suárez Serrato和Zidar（2016）关于州级企业税归宿的识别策略，指出其遗漏了企业构成渠道，并重新估计后得出企业所有者承担的税负份额约为25%而非40%。
Suárez Serrato and Zidar (2016) identify state corporate tax incidence in a spatial equilibrium model with imperfectly mobile firms. Their identification argument rests on comparative statics omitting a channel implied by their model: the link between common determinants of a location’s attractiveness and the average idiosyncratic productivity of firms choosing that location. This compositional margin causes the labor demand elasticity to be independent from the product demand elasticity, impeding the identification of incidence from the four estimated reduced-form effects. Assigning consensual values to the unidentified parameters, we find that the incidence share borne by firm owners is closer to 25 percent than 40 percent.