Macroeconomic Determinants of Equilibrium Unemployment Insurance

This paper proposes a new modeling strategy as regards the definition of an optimal level of unemployment benefits. While the traditional methodology privileges labor market equilibrium to derive optimal employment, wage and unemployment benefit levels, we present a model in which the optimal level of unemployment benefits is a function of the government’s macroeconomic objectives in terms of inflation and output fluctuations. In a second stage, the model allows for the investigation of unemployment insurance effects on labor market equilibrium.     

Does Country Matter for Subjective Well-Being?

It is known that characteristics of individuals explain only a part of the variations in Subjective Well-Being (SWB) between people. The country of origin of an individual accounts for a significant part of these differences. We study what drives the variations in SWB between countries after taking individual characteristics into account. We base our analysis on data from the four waves of the World Values Survey. 64% of the variations between the countries in the sample (64 countries) are explained by the natality rate, life expectancy, the level of corruption and a Muslim culture. This adds to the discussion on the link between economic conditions and SWB. The economic situation is not an explanatory variable in a direct way but indirectly affects SWB through some of the significant variables. Corruption has detrimental effects on SWB beyond its economic consequences.     

An ant colony optimization approach for the proportionate multiprocessor open shop

Multiprocessor open shop makes a generalization to classical open shop by allowing parallel machines for the same task. Scheduling of this shop environment to minimize the makespan is a strongly NP-Hard problem. Despite its wide application areas in industry, the research in the field is still limited. In this paper, the proportionate case is considered where a task requires a fixed processing time independent of the job identity. A novel highly efficient solution representation is developed for the problem. An ant colony optimization model based on this representation is proposed with makespan minimization objective. It carries out a random exploration of the solution space and allows to search for good solution characteristics in a less time-consuming way. The algorithm performs full exploitation of search knowledge, and it successfully incorporates problem knowledge. To increase solution quality, a local exploration approach analogous to a local search, is further employed on the solution constructed. The proposed algorithm is tested over 100 benchmark instances from the literature. It outperforms the current state-of-the-art algorithm both in terms of solution quality and computational time.

     

On total and edge coloring some Kneser graphs

Journal of Combinatorial Optimization - In this work, we investigate the total and edge colorings of the Kneser graphs K(n, s). We prove that the sparse case of Kneser graphs, the odd...     

Is peer regulation perceived as an effective mediator to strengthen the mission orientation of INGO leaders?

International non-governmental organizations (INGOs) operate in competitive funding markets and face political pressures, which can incentivize their leaders to compromise their mission-oriented strategy for more resource security. This article empirically investigates whether INGO leaders perceive peer regulation as an effective governance mechanism that allows them to strengthen their mission-oriented strategy to withstand these economic and political constraints. In particular, we assess whether peer regulation is perceived to promote organizational learning processes. We test a partial least squares structural equation model (PLS-SEM) based on a unique data set from an international survey among 201 INGO leaders from 21 countries. Our findings suggest that INGO leaders indeed perceive that peer regulation strengthens their mission orientation, despite the economic competition and political opportunity constraints their organization faces. This effect is partially mediated by organizational learning processes. Our findings are based on a constructivist perspective that emphasizes the learneffect of peer regulation on INGOs' strategic orientation, and allows the derivation of several managerial recommendations to foster INGOs' strategic autonomy.     

Exact algorithms for scheduling programs with shared tasks

We study a scheduling problem where the jobs we have to perform are composed of one or more tasks. If two jobs sharing a non-empty subset of tasks are scheduled on the same machine, then these shared tasks have to be performed only once. This kind of problem is known in the literature under the names of VM-PACKING or PAGINATION. Our objective is to schedule a set of these objects on two parallel identical machines, with the aim of minimizing the makespan. This problem is NP-complete as an extension of the PARTITION problem. In this paper we present three exact algorithms with worst-case time-complexity guarantees, by exploring different branching techniques. Our first algorithm focuses on the relation between jobs sharing one or more symbols in common, whereas the two other algorithms branches on the shared symbols.

     

Predicting burrowing owl flight trajectories in urban environments

Urban Ecosystems - It is important to understand how animals respond to changes in landscape structure, especially when considering habitat alteration and urbanization. Using the burrowing owl...     

Returns to Education during the Reform of State‐owned Enterprises in Hunan,People’s Republic of China

The objective of this paper is to analyse the impact of education on personal earnings during the reform of state‐owned enterprises, comparing 1995 with 1998 in Hunan, China, using the Mincerian earnings equation method. The results show that the rates of return to education increased, indicating that human capital has been better rewarded as the reforms of the Chinese economic structure have progressed. Moreover, the findings show that primary education receives the highest returns, followed by tertiary education. Middle school education obtains the lowest rewards, reflecting the effects of the reform of state‐owned enterprises on middle school graduates on whom the unemployment impact of this change has been the greatest.     

Influence of habitat type and distance from source area on bird taxonomic and functional diversity in a Neotropical megacity

The Neotropical region has been subjected to massive urbanization, which poses high risks for some global biodiversity hotspots and losses of ecosystem functions and services. In this study, we investigate how distance from large patches of native forests (source areas) and vegetation (green)/and infrastructure (gray) characteristics affect bird species richness and functional diversity in São Paulo megacity, southeastern Brazil. We analyzed the effects of source areas and green/gray characteristics on species richness and functional diversity (richness, evenness, and divergence) indices. We detected 231 bird species, and our data confirmed our predictions: (1) bird species richness in urbanized habitats was found to be (~?50–85%) lower than in source habitats; (2) species richness and trait composition significantly decreased as the distance from the source area increased, while functional richness was not affected by this metric; and (3) shrub and herbaceous covers and maximum height of trees were positively correlated with species richness and unique functional traits regarding habitat, diet, foraging and nesting strata and dispersal ability of birds in the forest-urban matrix. The number of buildings was negatively correlated with bird species richness and functional richness. Maximum height of buildings caused dramatic declines in functional evenness. Functional divergence was notably lower in sites with high shrub cover. Our study stresses the complexity of vegetation embedded in large Neotropical urban settlements and the need to maintain large protected areas surrounding megacities to mitigate the impacts of urbanization on birds.

     

Conflicting temporalities and the unsustainability of the Italian model of migrant personal care assistant

In Southern Europe, the migrant-in-the-family model has become a structural component of the elderly care regime. However, home care work is, by its nature, poorly reconcilable with private and family life. In fact, several studies have denounced the limitations on the right to private and family life that these workers suffer. In this article, I use the migrant home care assistants’ experience of conflicting temporalities around the work–life balance as lens through which to show the social unsustainability of the Italian model of home care assistant. This paper is based on broader research conducted between 2018 and 2020 in Padua (Italy) on Moldovan female migrant workers. As part of this research, 30 semi-structured interviews were collected with Moldovan workers employed – at the time of the interview or in the past – in home care for elderly people, in a live-in or live-out regime.