As recent trends in comparing the Han and Roman empires from primarily the point of view of literary evidence has brought forth new frameworks and opportunities of research, one asks how these developments could contribute to the comparison of governance behaviors, such as the administration of the iron industry. The paper first surveys the Han and the Roman literary sources regarding the iron industry governance, with which to establish parameters of the modus operandi in the respective imperial domains, and, when possible, identifies problems articulated by ancient authors. An interesting contrast is how Han sources showed particular concern for the impact of the iron industry on agricultural performance, while the primary concerns of Roman administrators were performances in leasing and taxation. Among the items known are mines, nails, and recycled iron. Both imperial administrations took a spatially oriented approach, establishing offices and bureaus across their respective domains to address their different concerns. Mapping iron production and administration sites in the Han and the Roman empires spatially further illustrate the governance behaviors identified above. Focused discussions on new excavations in the Martys (80km NW of Narbo) and Taicheng (90km W of Chang'an) further provide local frames of reference to interrogate the priorities and challenges highlighted. The preliminary results suggest that while concerns may differ between the two imperial governments, there are similarities in governance behaviors that are not technologically related, as some scholars suggest. Both imperial governments seemed to have been capitalizing on existing iron industry communities through managerial posts, at times bureaucratizing them. While the Han empire, in particular, attempted to bureaucratize iron production and distribution wholesale, the eventual scaling back of such mobilization marks the shared limitations of imperial control on the traditional culture of production and distribution of this basic commodity.
This paper addresses the methodological challenges of comparing the iron industries in the Qin-Han and Roman empires by creating "modeling domains" as a pragmatic and utilitarian approach. These domains, built from literary and archaeological evidence, represent generalized rules and frameworks, paired with diachronic, fragmented landscapes that depict the progressive acquisition and integration of lands with established metallurgical traditions. The paper argues that simply reaching this step is not enough, as each domain should be understood as part of a larger aggregative set, with an "external" dimension. The paper further discusses the distancing effect and the need for caution in cross-domain discussions, emphasizing the importance of historical and social specificity. The Roman-Parthian and Han-Nanyue examples are used to illustrate these challenges and opportunities. The paper concludes that the comparative approach should be ever-expanding, leading to a continual dialogue between domains and a deeper understanding of the dynamics of control, trade, and technological exchange in different historical and social contexts.
We investigate how exposure to the One-Child Policy (OCP) during early adulthood affects marriage and fertility in China. Exploring fertility penalties across provinces over time and the different implementations by ethnicity, we show that the OCP significantly increases the unmarried rate among the Han ethnicity but not among the minorities. The OCP increases Han-minority marriages in regions where Han-minority couples are allowed for an additional child, but the impact is smaller in other regions. Finally, the deadweight loss caused by lower fertility accounts for 10 percent of annual household incomes, and policy-induced fewer marriages contribute to 30 percent of the fertility decline.
Order type plays an important role in algorithmic trading and is a key factor of price impact. In this paper, we propose a new framework for studying the discrete price change process, which focuses on the impacts of aggressive orders (market orders and aggressive limit orders) and cancellations. The price change process is driven by states and events of best quotes, and we define the event-based price change as the "natural price change" (NPC). Under the framework, we propose a heteroscedastic linear econometric model for the NPC to explore the impact of different types of orders on the price dynamics. To verify the usability of our model and explore the driving factors of price dynamics, we conduct a thorough empirical analysis for 786 large-tick stocks traded on the Shenzhen Stock Exchange. Empirical results statistically demonstrate that aggressive orders can introduce stronger impact on the NPC than cancellations. Meanwhile, splitting a big order into several small orders can lead to a larger NPC. Our framework can also be applied for the prediction of price change.