A Comment on Second-Order Polynomial Regression Models

In a recent article, Chatterjee and Greenwood [1] addressed the problem of multicollinearity in polynomial regression models. They noted that there is a high correlation between X and X²; therefore, a second-order polynomial model suffers the consequences of collinearity. Chatterjee and Greenwood [1] suggested a method they believe will overcome the problem. The contention of the present comment is that the suggested method accomplishes nothing and, indeed, has the potential to lead the unwary researcher to the wrong inference and misinterpretation of his results.     

‘King's inheritors': understanding the ethnic discourse on the Rajbanshi as an indigenous community

The rise of ethnic struggles in various parts of the world, particularly in the post-colonial period, is an intriguing phenomenon. Having the consciousness of primordial origins, indigenous communities have pursued ethnic mobilizations along different lines in order to achieve the goals of social and economic uplift. This paper focuses on the Rajbanshi, one such community living in northeast India, as they offer an opportunity to study history and ethnic identity formation as the dynamics behind their current situation. From the standpoint of applied anthropology, processes of social change and activism intended to improve the lot of Rajbanshi communities are evaluated. Given their obscure origins, cultural diversity and divided political struggle, the Rajbanshi are far from achieving their goal of pursuing better lives. Strategies of Sanskritization and ‘sons-of-the-soil’ indigeneity have not reaped the desired results in terms of social and economic development. Furthermore, discourses rooted in immigrant-aboriginal binaries and theoretical dichotomies of primordialism–constructivism fail to make sense of this community's experience and are not helpful in guiding them toward meaningful and fruitful political and social change.     

Total edge irregularity strength of accordion graphs

An edge irregular total k-labeling \(\varphi : V\cup E \rightarrow \{ 1,2, \dots , k \}\) of a graph \(G=(V,E)\) is a labeling of vertices and edges of G in such a way that for any different edges xy and \(x'y'\) their weights \(\varphi (x)+ \varphi (xy) + \varphi (y)\) and \(\varphi (x')+ \varphi (x'y') + \varphi (y')\) are distinct. The total edge irregularity strength, tes(G), is defined as the minimum k for which G has an edge irregular total k-labeling. We have determined the exact value of the total edge irregularity strength of accordion graphs.     

致命吸引：现代电影中的荒野

＂荒野＂概念不仅在哲学争论而且在大众文化中均扮演了重要角色。野性大自然常常被视为一个人们遭遇意想不到事件的超文化领域的地方。一些作家和电影制作者通过叙述表现自然另一种荒芜景象的故事,从而反对将野性大自然罗曼蒂克化的主流观点。当遭遇到野性和蛮横,人们有时会在井然有序、人类中心和自我创造的世界图景同另外一种诚如普兰武德所说的＂界外风景＂的另外一种自然之间,感到不自在。《杰瑞》、《荒野生存》、《灰熊人》这三部电影所讲述的都是现代人遭遇野性的故事。这些作品都有这样一个共同主题：现代人总是被野性大自然吸引并试图探寻由于受到整个现代文明社会生活（精神）的限制,而无法获得的未知经验。而另一个相关主题则涉及,任何一种理想化的荒野概念本身就存在着深刻的问题。这三部电影都有吸引着现代观众的不幸结局。首先,这些电影都将荒野作为一种反对整个文明世界的力量;其次,对荒野着迷本身具有彻底的反身性,表明荒野包含着既自相矛盾又非常隐晦的道德意义。     

Impact of Retailers with Knowledge of Supplier's Inventory on Supply Chain Performance

We model a supply chain consisting of a supplier and multiple retailers facing deterministic demand. We denote some retailers as strategic in the sense that given the supplier inventory information, they will implement the optimal stocking policy by incorporating such information. On the other hand, some retailers are denoted as naïve in the sense that they ignore supply information and resort to a simplistic ordering policy. Naïve retailers learn the optimal policy over time and adjust their orders accordingly. We study the dynamics of this game and investigate the impact of such strategic and naïve retailers on the cost, ordering pattern and stocking policies of all parties. We analyze the supply chain under two scenarios: the centralized supply chain where the objective is to minimize the total supply chain cost, and the decentralized supply chain where each self‐interested player minimizes its own cost in a Stackelberg game setting. We fully characterize the optimal policies under both centralized and decentralized scenarios and show that, surprisingly, the supply chain might be better off by virtue of naïve retailers. The result is driven by the fact that strategic and naïve players’ decisions shift the positioning of inventory in the supply chain with its final impact being determined by the relative costs of different retailer‐types. Our results also offer managerial insights into how access to supply information can improve supply chain performance.     

Comparison between Bayesian approach and frequentist methods for estimating relative risk in randomized controlled trials: a simulation study

Relative risks (RRs) are often considered as preferred measures of association in randomized controlled trials especially when the binary outcome of interest is common. To directly estimate RRs, log-binomial regression has been recommended. Although log-binomial regression is a special case of generalized linear models, it does not respect the natural parameter constraints, and maximum likelihood estimation is often subject to numerical instability that leads to convergence problems. Alternative methods for solving log-binomial regression convergence problems have been proposed. A Bayesian approach also was introduced, but the comparison between this method and frequentist methods has not been fully explored. We compared five frequentist and one Bayesian methods for estimating RRs under a variety of scenario. Based on our simulation study, there is not a method that can perform well based on different statistical properties, but COPY 1000 and modified log-Poisson regression can be considered in practice.     

Lead Time Management through Expediting in a Continuous Review Inventory System

We consider a continuous review inventory system where delivery lead times can be managed by expediting in‐transit orders shipped from the supplier. First, we propose an ordering/expediting policy and derive expressions for evaluating the operating characteristics of such systems. Second, using extensive numerical experiments, we quantify the benefits of such an expediting policy. Third, we investigate a number of managerial issues. Specifically, we analyze the impact of the number of expediting hubs and their locations along the shipment network on the performance of such systems and offer insights into the design of the shipment network. We show (i) a single expediting hub that is optimally located in a shipment network can capture the majority of cost savings achieved by a multi‐hub system, especially when expediting cost is not low or demand variability is not high; (ii) when expediting time is proportional to the time to destination, for small‐enough or large‐enough demand variations, a single expediting hub located in the middle of the shipment network can capture the majority of cost savings of an optimally located hub; and (iii) in general, hubs close to the retailer significantly drive down costs, whereas hubs close to the supplier may not offer much cost savings.     

Exploring Autonomy in Group Work Practice with Persons with Intellectual Disabilities

Preserving the autonomy of individuals with intellectual disabilities in group work is challenging. Group workers often experience inadequate guidance about autonomy—an individual's capability to act independently without influence by others. Group workers can enhance autonomy through group activities that promote self-efficacy, empowerment, and the ability to make decisions. Fostering autonomy requires that the group workers be knowledgeable and aware of personal biases, analyzing their expectations and actions. To promote the autonomy of persons with intellectual disabilities in group work practice, the authors make recommendations to strengthen the IASWG Standards for Social Work Practice with Groups in this area.     

Objective Bayesian Analysis for Log-logistic Distribution

In this article, Bayesian approach is applied to estimate the parameters of Log-logistic distribution under reference prior and Jeffreys’ prior. The reference prior is derived and it is found that the reference prior is also a second-order matching priors as for the case of any parameter of interest. The Bayesian estimators cannot be obtained in explicit forms. Metropolis within Gibbs sampling algorithm is used to obtain the Bayesian estimators. The Bayesian estimates are compared with the maximum likelihood estimates via simulation study. A real dataset is considered for illustrative purposes.     

Deciphering the modern Janus: societal multiplicity and nation-formation

ABSTRACT

How to theorize the nation’s Janus-like form, its simultaneous modernity and antiquity? This paper provides an original answer to this longstanding question. It argues that nations arise from the interaction of ‘societal multiplicity’ and the expansionist tendency of historical capitalism. The emergence of capitalism super-adds a modern inflection to the inherently relational process of collective identity formation by generating modern sovereignty as an abstract form of rule. Crucially however, just like its emergence, capitalism’s expansion also refracts through societal multiplicity. Non-capitalist societies are therefore pressured into ‘nationalist’ projects of emulative self-preservation in which the nation’s political form (i.e. the sovereign state) is forged before its sociological content (i.e. primitive accumulation). Thus, the original site of this process, France, produced the modular nation-form that unlike Britain’s imperial nationhood could be globalized. The paper therefore shows that IR’s premise of multiplicity may be the key to one of social sciences’ most enduring puzzles.