Leadership Style in Relation to Organizational Change and Organizational Creativity: Perceptions from Nonprofit Organizational Members

As the environment within which organizations act continues to change and becomes increasingly competitive, maintaining an organizational climate that supports change and encourages creativity is a key objective for organizational leaders. This article examines the relationship between leadership style (transformational, transactional, laissez‐faire) and members' perceptions of the psychological climate for organizational change readiness and psychological climate for organizational creativity. Results indicate that transformational leaders have a direct positive relationship with psychological climate for organizational change readiness and organizational creativity, while laissez‐faire leaders have a negative relationship.     

The role of privacy concerns in the sharing economy

Internet-mediated sharing is growing quickly. Millions of users around the world share personal services and possessions with others ? often complete strangers. Shared goods can amount to substantial financial and immaterial value. Despite this, little research has investigated privacy in the sharing economy. To fill this gap, we examine the sharing–privacy nexus by exploring the privacy threats associated with Internet-mediated sharing. Given the popularity of sharing services, users seem quite willing to share goods and services despite the compounded informational and physical privacy threats associated with such sharing. We develop and test a framework for analyzing the effect of privacy concerns on sharing that considers institutional and social privacy threats, trust and social-hedonic as well as monetary motives.     

Signed total Roman domination in graphs

Let \(G\) be a finite and simple graph with vertex set \(V(G)\). A signed total Roman dominating function (STRDF) on a graph \(G\) is a function \(f:V(G)\rightarrow \{-1,1,2\}\) satisfying the conditions that (i) \(\sum _{x\in N(v)}f(x)\ge 1\) for each vertex \(v\in V(G)\), where \(N(v)\) is the neighborhood of \(v\), and (ii) every vertex \(u\) for which \(f(u)=-1\) is adjacent to at least one vertex \(v\) for which \(f(v)=2\). The weight of an SRTDF \(f\) is \(\sum _{v\in V(G)}f(v)\). The signed total Roman domination number \(\gamma _{stR}(G)\) of \(G\) is the minimum weight of an STRDF on \(G\). In this paper we initiate the study of the signed total Roman domination number of graphs, and we present different bounds on \(\gamma _{stR}(G)\). In addition, we determine the signed total Roman domination number of some classes of graphs.     

Das Weltsystem des Erdöls

This is an attempt at formulating, on a theoretical and empirical basis, construction principles and patterns of change of the “world economy of oil”. This term refers to a loose and variable configuration of nation states, multinational corporations, the “Organization of Petroleum Exporting Countries” (OPEC) and a set of market regulations related to the production, distribution and consumption of oil on a worldwide scale. The main argument links together four interrelated and partially overlapping functional processes: (1) capitalism as a profit-oriented, innovative and expansive economic principle; (2) incorporation of the external oil deposits by the governments and corporations of the central industrial nations; (3) the emergence of countervailing power within the peripheral, oil-exporting countries in order to gain control over their oil resources and to change the unequal exchange relations with the capitalist centers; (4) change of the integration mode of the “world-economy of oil” based on a new balance of interests between centers and peripheries following severe economical and political crises. The analysis is concluded with a functional-cyclical model of the world economy of oil.     

The Long-Term Effect of the Timing of Fertility Decline on Population Size

Existing long-range population projections imply that the timing of the fertility transition has a relatively unimportant effect on long-term population size when compared with the impact of the level at which fertility is assumed eventually to stabilize. However, this note shows that the effect of the timing of fertility decline is a function of the eventual fertility rate: the lower the eventual fertility rate, the greater the effect of the timing of the transition becomes. This finding has important implications for projection methodology, as well as for policies related to the consequences of long-term levels of population size.     

Is the Demographic Dividend an Education Dividend?

The effect of changes in age structure on economic growth has been widely studied in the demography and population economics literature. The beneficial effect of changes in age structure after a decrease in fertility has become known as the “demographic dividend.” In this article, we reassess the empirical evidence on the associations among economic growth, changes in age structure, labor force participation, and educational attainment. Using a global panel of countries, we find that after the effect of human capital dynamics is controlled for, no evidence exists that changes in age structure affect labor productivity. Our results imply that improvements in educational attainment are the key to explaining productivity and income growth and that a substantial portion of the demographic dividend is an education dividend.     

Least squares and shrinkage estimation under bimonotonicity constraints

In this paper we describe active set type algorithms for minimization of a smooth function under general order constraints, an important case being functions on the set of bimonotone r×s matrices. These algorithms can be used, for instance, to estimate a bimonotone regression function via least squares or (a smooth approximation of) least absolute deviations. Another application is shrinkage estimation in image denoising or, more generally, regression problems with two ordinal factors after representing the data in a suitable basis which is indexed by pairs (i,j)∈{1,…,r}×{1,…,s}. Various numerical examples illustrate our methods.