Text as Policy: Measuring Policy Similarity through Bill Text Reuse

The identification of substantively similar policy proposals in legislation is important to scholars of public policy and legislative politics. Manual approaches are prohibitively costly in constructing datasets that accurately represent policymaking across policy domains, jurisdictions, or time. We propose the use of an algorithm that identifies similar sequences of text (i.e., text reuse), applied to legislative text, to measure the similarity of the policy proposals advanced by two bills. We study bills from U.S. state legislatures. We present three ground truth tests, applied to a corpus of 500,000 bills. First, we show that bills introduced by ideologically similar sponsors exhibit a high degree of text reuse, that bills classified by the National Conference of State Legislatures as covering the same policies exhibit a high degree of text reuse, and that rates of text reuse between states correlate with policy diffusion network ties between states. In an empirical application of our similarity measure, we find that Republican state legislators introduce legislation that is more similar to legislation introduced by Republicans in other states, than is legislation introduced by Democratic state legislators to legislation introduced by Democrats in other states.      

Time to Say Goodbye

Tim Hortons’ first donut store was established in Hamilton, Ontario, in 1964; other stores were added over time as the chain gradually diffused across Canada to become the country’s largest quick-service restaurant chain with more than 2,400 restaurants. In achieving this dominant status it adopted one of the strategies of any successful restaurant chain; utilizing a uniform architectural style to emphasize to customers the consistency in its menu and operations. This article examines the processes underlying the development of the Tim Hortons brand and the diffusion of its restaurants into the US, specifically the appearance of their restaurants in the Great Lakes borderlands. The study found a consistent architectural style in Ontario but several different styles in Michigan and New York. It is suggested that this lack of consistency in brand identification in its US restaurants is a contributory factor to their lack of profitability and smaller sales.     

检方施治:防疫方书与清代的疫情防控

抄录、编撰、刊印、传播、参阅防疫方书,是清代疫情期间常见的医疗实践活动。防疫方书的大量涌现是一次次疫病流行激发的结果,是疫情防控实践本身的重要组成部分。它们在染疫病人救治、防疫力量动员、防疫知识整合和普及等方面发挥着独特的媒介作用,是相关人、事、物实现链接和互动的一种重要途径,是人们积极主动地应对疫病、控制疫情、维护生命健康的一种"原动力"。相较于其他常见防疫举措,防疫方书深度参与到多种疫情防控实践中,实际构成了一种自发性、分散性、非制度性的疫病应对机制,具有成本低廉、传导性强、覆盖面广、溢出效应大等特征。     

Shifting Constellations of Actors and Their Influence on Policy Diffusion: A Study of the Diffusion of Drug Courts

The existing studies of policy diffusion have paid insufficient attention to how policy actors in the macroenvironment of local jurisdictions influence the process of policy diffusion, what kind of mechanisms drive the interdependent spread of a policy, and how the diffusion process changes over time. We explore, both theoretically and empirically, the role different go‐betweens can play in policy diffusion, what kind of interactions take place between the micro level and macro level, and how shifts in the constellations of actors in the macroenvironment of a local jurisdiction can influence the mechanisms and rate of policy diffusion. Our empirical study of the diffusion of drug courts in four U.S. states demonstrates that there can indeed be significant interactions between the micro level and the macro level and that these interactions are likely to shape the diffusion process.     

大雁塔和法门寺砖材保护研究

大雁塔和法门寺塔这两座佛教名塔都表现出明显的风化现象,需要及时的给于保护。通过X-射线衍射分析、岩相显微镜分析及孔隙度的测定,分析了大雁塔和法门寺两座佛教名塔的风化特征。在此基础上,用几种不同的加固保护剂对两种砖材进行加固保护研究。通过渗透深度、孔隙度、毛细吸水和毛细渗透、持水量、透气性、水力学膨胀、等温吸附、抗压强度及酸腐蚀、冻融、热膨胀之后的强度衰减等参数分析,结果表明含氟聚合物对两种砖材具有良好的加固保护效果。     

Abnormally pressured beds as barriers to diffusive solute transport in sedimentary basins

Diffusion can drive significant solute transport over millions of years, but ancient brines and large salinity gradients are still observed in deep sedimentary basins. Fluid flow within abnormally pressured beds may prevent diffusive transfer over geologically significant periods, if the abnormally pressured bed is surrounded by normally pressured beds. Analytic solutions based on sediment loading and unloading demonstrate that this effect should be considered in beds with a compressibility exceeding 10^?8 Pa^?1, with a thickness of 100 m or more, or a sedimentation rate exceeding 10^?5 m year^?1. Conditions favourable for our model of abnormally pressured beds appear common in sedimentary basins. Large salinity gradients associated with clay beds have previously been attributed to membrane effects, but flow patterns associated with abnormally pressured beds appear more robust in the presence of heterogeneity and discontinuities than membrane effects. Calculations suggest that thick underpressured shales in the Alberta basin may have allowed ancient evaporatively concentrated brines to be preserved beneath a vigorous topography‐driven flow system over the last 60 My. In the Illinois basin, drained overpressured beds may have limited solute transport across the New Albany shale until approximately 250 Ma. It is unlikely, however, that overpressures could have persisted long enough to explain concentration gradients observed in the modern basin. These gradients may instead reflect relatively recent halite dissolution above the New Albany shale.     

The spatial anatomy of an epidemic: influenza in London and the county boroughs of England and Wales, 1918–1919

From uncertain origins in the spring of 1918, an apparently new variant of influenza A virus spread around the world as three distinct diffusion waves, infecting half a billion and probably killing around 40 million people. This paper examines the spatial structure of influenza transmission during the ten–month course of the epidemic in England and Wales, June 1918–April 1919, using the weekly counts of influenza deaths in London and the county boroughs as collated by the General Register Office, London. In addition, a particular case study of the borough of Cambridge is presented. From mid–1916, Cambridge contained, as well as its undergraduate population, a large naval contingent billeted in both the colleges and the town. It therefore affords the opportunity of studying the effect of the epidemic in contiguous groups with widely differing demographic characteristics. Through the application of a range of statistical methods (average lags, correlations and regressions), it is shown that the three waves that comprised the pandemic had fundamentally different spatial and temporal characteristics. The first, moving through a population that was a virgin soil to the new virus strain, was explosive in its north to south progress across the country. The second wave was somewhat slower in its rate of diffusion and displayed a south to north drift. Finally, the third wave reverted more closely to the form of the first. The spread of all three waves, however, was underpinned by a clearly defined process of spatial contagion. The Cambridge study showed the special characteristics of this pandemic in terms of the ages of those attacked: high rates were experienced across the age spectrum, a feature also seen internationally.     

浙江出土青铜器研究

本文在对浙江出土先秦青铜器作分区研究的基础上,就不同地区青铜器的铸造技术作了考察,发现在不同时期分别运用了浑铸法、分铸法两种成型技术为主的工艺。再结合这些器物的出土情况,明确其相对年代,并对不同期段青铜器的流动情况作了探索。     

Defiant Innovation: The Adoption of Medical Marijuana Laws in the American States

Diffusion research often characterizes the role of the federal government in innovation adoption as a supportive one, either increasing the likelihood of adoption or its speed. We examine the adoption of medical marijuana laws (MMLs) from 1996 to 2014 to shed light on what motivates states to adopt innovations that are in explicit defiance of federal law. Furthermore, we examine whether federal signals have any influence on the likelihood of adoption. In doing so, we utilize implementation theory to expand our understanding of how the federal government's position impacts state policy innovation adoption. We find mixed evidence for the influence of federal signals on the adoption of MMLs. The results suggest that medical marijuana policies are much more likely to be adopted in states when proponents have the political or institutional capital, rather than a medical or fiscal need. Moreover, this political capital is sufficient independent of the federal government's real or perceived position.     

Does Policy Diffusion Need Space? Spatializing the Dynamics of Policy Diffusion

For decades, scholars in multiple disciplines have examined spatial diffusion, or the spatiotemporal properties associated with the diffusion of innovations. These properties include contagious, hierarchical, and relocation diffusion. Each of these refers to a spatial model that epitomizes how innovations spread among geographic locations. Policy diffusion, a separate but homologous research tradition, had its theoretical underpinnings in spatial diffusion. However, contemporary policy diffusion has focused largely on mechanism‐based diffusion. This article demonstrates how exploratory spatial data analysis can be used to uncover spatial policy diffusion properties. In this study, municipal smoking regulation adoptions, religious‐based initiatives, and bag ban and bag fees are examined. This study finds evidence that for each policy more than one property is occurring; therefore, this study proposes that a hybrid model best explains diffusion. This article demonstrates how examining spatial diffusion properties, in addition to diffusion mechanisms, can improve the conceptualization of diffusion theories, enhance mechanism or theory‐based specification of diffusion models, and unravel the specific regional or neighboring causal pathways linking policies between adopting jurisdictions.