京津冀汽车制造业地域分工研究

从地域分工的角度切入，利用空间分析可视化表达了京津冀地区汽车制造业的布局演变，在采用生态位宽度和生态位重叠指标测度京津冀地区汽车制造业分工程度的基础上，从分工效率和政策两方面衡量了目前的区域分工格局，发现分工现状并不十分合理。由此，对优化京津冀汽车制造业地域分工提出了具体建议。     

Arithmetics of research specialization

In hiring decisions, universities explicitly reward focusing on a specific field. I model the use of research specialization (focusing) in hiring as a signal of ability. Without explicit reward for focusing, candidates who focus are more likely to be able. However, if job market rewards focusing, less able candidates who would otherwise be indifferent between focusing or not, start focusing, which leads to smaller likelihood of observing an able candidate among those who focus than among those who do not. Specialization works as an effective ability signal only when generation of good ideas is highly likely for all ability levels.     

The Effect of Client Industry Agglomerations on Auditor Industry Specialization

Prior research on auditor industry specialization documents fee premiums for local audit offices that are industry specialists. This research assumes that the effects of specialization are uniform across markets. We examine industry specialization based on the economic theory of industry agglomeration (geographic areas with high industry concentration). Agglomeration economies can facilitate access to knowledge for auditors serving a specific industry in those locations. We find that industry specialists in agglomerations earn a fee premium in excess of specialists in other markets. We find that nonspecialist offices in agglomerations also earn fee premiums in that industry when compared to nonspecialists in other markets even when controlling for these groups’ absolute share of the national market. We also address whether or not this expertise can be shared among offices in an agglomeration specialist's firm. We find that audit offices that have easy connections to a within-firm office in an agglomerated market can earn a fee premium relative to more distant offices, suggesting a benefit from knowledge transfer. This fee premium accrues to offices that would not be considered a specialist using traditional market share measures in a given industry. These findings indicate that the benefit of industry specialization depends on more than local market share.