A Stochastic Team Formation Approach for Collaborative Mobile Crowdsourcing

Mobile Crowdsourcing (MCS) is the generalized act of outsourcing sensing tasks, traditionally performed by employees or contractors, to a large group of smart-phone users by means of an open call. With the increasing complexity of the crowdsourcing applications, requesters find it essential to harness the power of collaboration among the workers by forming teams of skilled workers satisfying their complex tasks' requirements. This type of MCS is called Collaborative MCS (CMCS). Previous CMCS approaches have mainly focused only on the aspect of team skills maximization. Other team formation studies on social networks (SNs) have only focused on social relationship maximization. In this paper, we present a hybrid approach where requesters are able to hire a team that, not only has the required expertise, but also is socially connected and can accomplish tasks collaboratively. Because team formation in CMCS is proven to be NP-hard, we develop a stochastic algorithm that exploit workers knowledge about their SN neighbors and asks a designated leader to recruit a suitable team. The proposed algorithm is inspired from the optimal stopping strategies and uses the odds-algorithm to compute its output. Experimental results show that, compared to the benchmark exponential optimal solution, the proposed approach reduces computation time and produces reasonable performance results.Comment: This paper is accepted for publication in 2019 31st International Conference on Microelectronics (ICM

Economic Integration Geography and Growth: A theoritical Analysis

Economic integration plays an important role in trade, in knowledge diffusion and in economic growth. However, this role depends on the geographical distance between countries. The purpose of this paper is to study the geographical distance effects on the advantages of economic integration. To do so we extend the Romer and Rivera Batiz (1991) model by adding the distance between countries. Our main findings are: in the presence of the geographical distance effects (i) the growth rate does not double compared to autarky as in the Romer and Rivera Batiz model, ii) the share of human capital allocated to research sectors increases and (iii) the growth rate in centralized equilibrium is lower than that in decentralized equilibrium. Keywords: Economic integration; Geographical distance; Spillovers; Economic growth. JEL Classification Codes: F15 , F43, O3

On the Moore Formula of Compact Nilmanifolds

Let $G$ be a connected and simply connected two-step nilpotent Lie group and $\Gamma$ a lattice subgroup of $G$. In this note, we give a new multiplicity formula, according to the sense of Moore, of irreducible unitary representations involved in the decomposition of the quasi-regular representation ${\rm Ind}_{\Gamma}^G(1)$. Extending then the Abelian case

Impact of Financial Integration on Production Volatility in Developing Countries

The purpose of this paper is to study the interaction between financial integration and ICT developments, and how thishas an effect onproduction volatility. It usespanel data on ten developing countries taken from 1987 to 2010. We use the PVAR approach, the response impulsionfunctionand the variance decomposition. Our results on countries that are exceptionally financially integrated and/or possess a high level of ICT indicate that theyexperience strong fluctuations of production in cases of monetarypolicyshocks, and small fluctuations of production in cases of budgetary policy shock. Keywords: financial integration, production volatility, ICTs, panel VAR

Discrete Cocompact Subgroups of the Five-Dimensional Connected and Simply Connected Nilpotent Lie Groups

The discrete cocompact subgroups of the five-dimensional connected, simply connected nilpotent Lie groups are determined up to isomorphism. Moreover, we prove if $G=N\times A$ is a connected, simply connected, nilpotent Lie group with an Abelian factor $A$, then every uniform subgroup of $G$ is the direct product of a uniform subgroup of $N$ and ${\mathbb Z}^r$ where $r=\dim A$

LA TRANSPARENCE DE L'ENTREPRISE ET LA STRUCTURE DE PROPRIETE: CAS DES ENTREPRISES FRANÇAISES

Ce papier étudie la relation entre le niveau de transparence de l'entreprise et sa structure de propriété sur le marché français. L'intérêt de notre étude est de donner une explication à la diversité des publications observée dans un contexte d'actionnariat concentré. En se basant sur la multiplicité des supports de la communication financière nous avons évalué simultanément les rapports annuels et les sites Web officiels des entreprises appartenant à l'indice SBF 120, a fin d'apprécier plus pertinemment la qualité de la communication financière des entreprises françaises cotées. Les résultats montrent que le niveau de transparence de la firme est négativement associé à la concentration d'actionnariat et au contrôle familial. Ces preuves mettent en évidence les problèmes de transparence qui existent dans les structures concentrées et soulignent le rôle des actionnaires contrôleurs dans l'expropriation des actionnaires minoritaires.Transparence de l'entreprise, communication financière, structure de propriété gouvernance de l'entreprise.