Bayesian dynamic network actor models with application to South Korean COVID-19 patient movement data

Statistical Methods & Applications - Motivated by the ongoing COVID-19 pandemic, this article introduces Bayesian dynamic network actor models for the analysis of infected individuals’...     

External Knowledge Sourcing and Firm Innovation Efficiency

This study examines the relationship between external knowledge sourcing and firm innovation efficiency. We build on the organizational learning theory to propose that this relationship follows an inverted U‐shape: as the level of external knowledge sourcing increases from low to moderate, firm innovation efficiency increases; as the level of external knowledge sourcing increases from moderate to high, firm innovation efficiency declines. Further, we explore the moderating role of different contextual factors and contend that this inverted U‐shaped relationship is flattened in firms that operate in high‐tech sectors and in firms that face high internal constraints for innovation. Our empirical analysis is based on a sample of 3,204 Spanish firms over the period 2004–2015, and our results provide support for these contentions. We used data envelopment analysis methodology to estimate firm innovation efficiency relative to industry best performers, and truncated regression models for panel data with bootstrapped confidence intervals to test our hypotheses.     

Discrete approximations of continuous and mixed measures on a compact interval

When considering a mixed probability measure on [0, 1] with atoms in zero and one, the frontier points have to be treated (and ??weighted??) differently and separately with respect to the interior points. In order to avoid the troublesome consequences of a mixed model, an easily interpretable discretization of [0, 1] on uniformly spaced atoms is here proposed. This ??homogeneous support?? is used to define two discrete models, a parametric and a nonparametric one. An application to real data on recovery risk of the Bank of Italy??s loans is here considered to exemplify both discretization and proposed models. Finally, a simulation study is performed to analyze the behavior of the nonparametric proposal in terms of goodness-of-fit.     

Demos-Ethos: a framework to study the Icelandic and Basque cases through Critical Social Innovation and Applied Ethics

This article presents a framework informed by two disciplines, Social Innovation and Applied Ethics, to be used in an ongoing analysis of territorial democratic systems. It aims to combine Social Innovation and Applied Ethics analysis to better understand the socio-political regeneration process in Iceland initiated with the 2008 global crisis. This crisis, particularly in Iceland had an economic and political aspect affecting the self-understanding of the territories as a whole, but in the Basque Country at present, it also deals with the current peace process to settle down political violence and its causes. In both cases there are deep underlying value issues. Nevertheless, this article introduces only the results obtained in Iceland. While its democratic system has proven to be able to contest the causes of the crisis, there is no definitive evidence that the re-examination process that was opened in October 2008 is resolved yet.     

Bayesian modeling of university first-year students' grades after placement test

University first-year students grades are naturally correlated with the scores obtained at placement tests. Often this characteristic leads the university grades in the first exams to be asymmetrically distributed. Motivated by the analysis of grades of the basic Statistics examination of first-year students, we discuss informative priors for the shape parameter of the skew-normal model, a class of distribution which account for several degree of asymmetry. Our proposed prior leads to closed-form full-conditional posterior distributions, particularly useful in Markov Chain Monte Carlo simulation. A Gibbs sampling algorithm is discussed for the joint vector of parameters and the method is applied to a real data set from the School of Economics, University of Padua, Italy. Our analysis reveals that the correlation between the placement test and the grades of first-year students leads to a measurable positive skewness of the distribution of the university grades.     

Extreme mortality in nineteenth-century Africa: the case of Liberian immigrants

Several studies have examined the mortality of immigrants from Europe to Africa in the nineteenth century. This paper examines the level of mortality in Liberia of Africans who emigrated there from the United States. A life table is estimated from data collected by the American Colonization Society from 1820 to 1843. The analysis reflects the mortality experience of a population that is transplanted from one disease environment to another, more exacting, disease environment. The results of this analysis show that these Liberian immigrants experienced the highest mortality rates in accurately recorded human history.     

Trade and development in the world economy: Methodological features of Project DYNAMICO

The paper reports on the methodological features and early application of the model underlying the DYNAMICO Projects, which has been developed at the United Nations Secretariat to study the interaction between trade and development. In order to investigate alternative development strategies, scenarios are calculated year by year for the global economy and the ten regions covered in the model.Each year is represented by a block-angular linear programming problem, where the systemwide (or coupling) constraints represent the world market clearance conditions for nine tradable commodities. Each subblock of relations represents the economy of a given region. The Dantzig-Wolfe decomposition method is used to solve the system.Section 2 reviews the specifications of a typical regional subproblem. Each regional subproblem contains the following material balances; labor, land, and capital requirements; investment functions; the most important macroeconomic definitions; and several other restrictions to simulate policy constraints concerning both domestic and external economic activity.Decomposition methods may, in general, be viewed as resource-allocation procedures valuable to capture some of the essential features of decentralized decision-making. In the literature, two classes of such resource-allocation procedures have been proposed: primal (relying on quantity signals), and dual (relying on prices). Section 3 discusses some of the theory underlying the Dantzig-Wolfe method, which is a price-directive one.Section 4 describes in detail the particular solution method implemented in the model. At first, in a prelink phase, each regional subproblem is solved a number of times on the basis of     

Building an integral metatheory of management

The increasing fragmentation of organization theory seems not to be responding to the challenges and complexities of organizations and society. This article contends that integral theory can make an important contribution to our discipline and presents a metatheory that integrates all previous organizational knowledge in an integral, balanced and non-marginalizing framework. Using metatriangulation techniques it reviews management and organization theories, classifies them according to their underlying paradigms and integrates them in a new metatheory. The resulting theory called “3D Management” maintains that there are 3 basic and irreducible dimensions of management: science, arts and ethics which refer respectively to the techno-economical, the aesthetic-emotional and the moral aspects of organizational reality. The fourth management dimension, the spiritual dimension, integrates the Big Three in an essential unit and strives for unity and meaning. An assessment of the theory and a concluding discussion of its contributions and potential applications is provided.     

Investors’ expectations around quantitative easing: does liquidity injection affect European banks equally?

Journal of Management and Governance - The role of liquidity in the banking industry is increasingly under the spotlight since the Global Financial Crisis (GFC) in 2007. Prior evidence offers...