Chinatown 2.0: the difficult flowering of an ethnically themed shopping area

Right in Amsterdam’s picturesque Canal Zone, on and around Zeedijk, Chinese entrepreneurs have carved out a presence in what seems like the local Chinatown. The businessmen have been targeting Asian and non-Asian customers by offering products that – to an extent – can be associated with Asia, China in particular. Since the early 1990s, individual entrepreneurs and their business organisations have campaigned for official acknowledgement of Zeedijk as an ethnic-only district and for governmental support of the enhancement of Chineseness. Following Hackworth and Rekers. [(2005). “Ethnic Packaging and Gentrification. The Case of Four Neighborhoods in Toronto.” Urban Affairs Review 41 (2): 211–236], we argue that this case challenges traditional understandings of ethnic commercial landscapes. In sharp contrast to the current orthodoxy, which would conceive the proliferation of such an ‘ethnic enclave’ as part of a larger process of assimilation, we have approached Amsterdam’s Chinatown first and foremost as a themed economic space: Chinese and other entrepreneurs compete for a share of the market and in doing also for the right to claim the identity of the area. What is the historical development of the Zeedijk area, how did Chinese entrepreneurs and their associations try to boost Chinatown and negotiate public Chineseness, and how did governmental and non-governmental institutional actors respond to those attempts?     

转型期中国西部城市定位选择——遵义市红花岗区“十三五”城市发展定位选择案例分析

中国中小城市存在城市定位特色缺失及个性不强的问题。通过对遵义市红花岗区城市定位选择的案例研究发现,政治因素、资源禀赋、区域文化、竞争环境、发展趋势影响城市的定位选择。西部小城市定位不准的主要原因是财政困难、产业缺乏、城市化率低、传统城市经营方式不可持续。发展经济、解决财政问题是城市政府的首要选择,城市经济发展考核指标及城市政府的现实需求对城市定位选择具有直接影响。现有城市定位理论对中国西部中小城市的定位指导有局限性。     

More on the restricted Liu estimator in the logistic regression model

?iray et al. proposed a restricted Liu estimator to overcome multicollinearity in the logistic regression model. They also used a Monte Carlo simulation to study the properties of the restricted Liu estimator. However, they did not present the theoretical result about the mean squared error properties of the restricted estimator compared to MLE, restricted maximum likelihood estimator (RMLE) and Liu estimator. In this article, we compare the restricted Liu estimator with MLE, RMLE and Liu estimator in the mean squared error sense and we also present a method to choose a biasing parameter. Finally, a real data example and a Monte Carlo simulation are conducted to illustrate the benefits of the restricted Liu estimator.     

信息基础、声誉机制与执法优化——食品安全治理的新视野

对于食品安全违法行为的威慑何以有效?这是破解食品安全监管困境的关键所在。基于繁重的执法负荷与稀缺的公共执法资源,食品安全迫切需要创新治理形式。声誉机制创设的威慑充分虑及企业的长期收入流,借助无数消费者的"用脚投票"深入作用于企业利益结构的核心部分,因而能够有效阻吓企业放弃潜在的不法行为,分担监管机构的一部分执法负荷,是一种颇有效率的社会执法。但是,声誉罚的要义在于信息高效流动,而现代食品行业与公众之间的信息鸿沟使得消费者很难自发形成强有力的声誉机制。应当以食品安全信用档案为中心,建立全程整合信息生产—分级—披露—传播—反馈的法律制度系统,确保企业违法信息迅速进入公众的认知结构,为消费者及时启动声誉罚奠定基础。同时,应当以声誉机制的适用为契机,积极探索食品安全的社会治理之道,回应执法历史发展所蕴含的成本逻辑,实现执法优化。     

Complete convergence and the strong laws of large numbers for pairwise NQD random variables

The authors study the strong convergence for sequences of pairwise negatively quadrant dependent (NQD) random variables under some wide conditions, and present some new theorems on the complete convergence and the strong laws of large numbers. The obtained results extend and improve some theorems in existing literature.     

Coordinate sampler: a non-reversible Gibbs-like MCMC sampler

We derive a novel non-reversible, continuous-time Markov chain Monte Carlo sampler, called Coordinate Sampler, based on a piecewise deterministic Markov process, which is a variant of the Zigzag sampler of Bierkens et al. (Ann Stat 47(3):1288–1320, 2019). In addition to providing a theoretical validation for this new simulation algorithm, we show that the Markov chain it induces exhibits geometrical ergodicity convergence, for distributions whose tails decay at least as fast as an exponential distribution and at most as fast as a Gaussian distribution. Several numerical examples highlight that our coordinate sampler is more efficient than the Zigzag sampler, in terms of effective sample size.     

中国城镇新增住房需求规模的测算与分析

本文围绕城镇家庭户自然增长、城镇家庭户机械增长和城镇存量住房拆除三项需求来源,设计了基于人口普查等公开统计数据定量测算城镇新增住房需求规模的系统性方法,对2001—2010年和2011—2015年间全国和各省份城镇新增住房需求规模进行测算与分析。在此期间新增住房供需关系经历了从基本均衡向供过于求的变化,同时存量住房拆除引致的被动需求取代城镇家庭户自然增长和机械增长引致的主动需求,成为新增住房需求的最主要来源。东、中、西部省份在新增需求规模、新增供需比、需求结构等方面表现出明显差异。本文还进一步对2021—2030年的发展趋 势进行了定量预测。由于三项需求来源均趋于下降,2021—2025年和2026—2030年间全国年均城镇新增住房需求规模预计将较2011—2015年间分别下降33%和53%。本文设计的城镇新增住房需求规模测算方法和预测思路能够为各级政府“十四五”住房发展规划编制、房地产企业战略制定等提供参考。     

文化软实力绘就武陵山区美丽乡村新图景 ——以石柱县金铃乡银杏村为实践标杆

位于武陵山区石柱土家族自治县的金铃乡银杏村，是集少数民族、革命地区、集中连片的特困地区。一方面该村以自然山水风光为资源禀赋，以培育民族文化精神高地为乡村振兴“铸魂”、“赋能”；以“非遗文化+扶贫”的路子，激活了乡村的内生动力；文化扶贫直抵人心取得了“点石成金”的效果，让土家人充分享受到文化释放的红利。另一方面，该村作为“民族团结进步示范村”，以做深做实民族团结工作为抓手，充分让民族政策惠及土家万户，生动地实现了民族团结之花在土家大地上常开常盛。一个个串联成珠的实践案例，为武陵山打赢脱贫攻坚战更好地接续乡村振兴发挥了活标杆的示范引领作用，向世人展示一幅色彩斑斓的美丽乡村新图景。