La contingence et le travail de conception. Définir,organiser, délibérer

The activity of a design office consists in producing plans for things that do not yet exist. If, through poor management, the designers fail to anticipate accurately what the product will be, work will be inappropriately allocated and divided. Given the uncertain nature of the activity and the outcome, designers are simultaneously involved in the process of producing technical solutions, a process of organisation — through constant reallocation of tasks — and a political process of ironing out disagreements — through the exploration of multiple heterogeneous possibilities.     

Modeling resource flow asymmetries using condensation networks

This paper examines strict Nash networks in the noncooperative directed flow model of Bala and Goyal (Econometrica 68(5):1181–1230, 2000) with partner heterogeneity (payoff of a player in a link depends on the identity of her link partner). We focus on the asymmetries with regard to the resources obtained by players. Using the notion of condensation networks, we partition the population into groups of players who obtain the same resources and order these groups according to the resources they obtain. We show that the partner heterogeneity assumption impacts the strict Nash networks asymmetries in a different way than Galeotti (Econ Theory 29(1):163–179, 2006) player heterogeneity assumption (the payoff of a player in a link depends on her own identity).     

Location adjustment for the minimum volume ellipsoid estimator

Estimating multivariate location and scatter with both affine equivariance and positive breakdown has always been difficult. A well-known estimator which satisfies both properties is the Minimum Volume Ellipsoid Estimator (MVE). Computing the exact MVE is often not feasible, so one usually resorts to an approximate algorithm. In the regression setup, algorithms for positive-breakdown estimators like Least Median of Squares typically recompute the intercept at each step, to improve the result. This approach is called intercept adjustment. In this paper we show that a similar technique, called location adjustment, can be applied to the MVE. For this purpose we use the Minimum Volume Ball (MVB), in order to lower the MVE objective function. An exact algorithm for calculating the MVB is presented. As an alternative to MVB location adjustment we propose L ₁ location adjustment, which does not necessarily lower the MVE objective function but yields more efficient estimates for the location part. Simulations compare the two types of location adjustment. We also obtain the maxbias curves of L ₁ and the MVB in the multivariate setting, revealing the superiority of L ₁.     

A note on local spillovers, convexity, and the strategic substitutes property in networks

We provide existence results in a game with local spillovers where the payoff function satisfies both convexity and the strategic substitutes property. We show that there always exists a stable pairwise network in this game, and provide a condition which ensures the existence of pairwise equilibrium networks.     

How Risk Disciplines Pre-Commitment

This paper studies the entry strategies of firms on risky markets. We focus on markets where demand is affine and cost is linear; moreover, the demand includes a normally distributed random variable. In such a model, we show that the leader’s strategy changes with the level of market risk even when firms are risk neutral. Therefore, the availability of future information for a Stackelberg follower has a feedback effect on the leader’s strategy. We also show that compared with traditional markets with no risk, the basic trade-off between flexibility and pre-commitment is only slightly changed in the qualitative game where firms are free to choose when to enter the market.

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What do board members in art organizations do? A grounded theory approach

This paper explores the characteristics and activities of board members in art organizations. It describes two case studies within international artists’ residencies in France and Germany. Adopting a grounded theory approach, our study identifies the different characteristics of board members such as friendship, competence and diversity, together with board activities such as controlling, advising, legitimating, helping, exchanging and deciding. The contributions of this research are twofold. First, contrary to most governance literature, the independence of board members and board monitoring roles do not seem to be important issues for the two art organizations involved. Instead, friendship and networking appear to be key factors for the board, helping the organizations to be successful by giving them more chance to survive and grow. Second, as specific board members in the two cases studied, executive directors play a continual role of “governance entrepreneurs,” building and managing various board-related organs to counterbalance the influence of fund providers. In this way, executive directors attempt to satisfy their predominant public fund providers and to help the artists’ residencies survive.     

Adaptive wavelet estimation of a function in an indirect regression model

We consider a nonparametric regression model where m noise-perturbed functions f ₁,…,f _m are randomly observed. For a fixed ν∈{1,…,m}, we want to estimate f _ν from the observations. To reach this goal, we develop an adaptive wavelet estimator based on a hard thresholding rule. Adopting the mean integrated squared error over Besov balls, we prove that it attains a sharp rate of convergence. Simulation results are reported to support our theoretical findings.     

Measuring Employment Arrangements in the European Labour Force: A Typological Approach

In this article employment quality in the EU27 is investigated by means of a typological approach, based on several features of the employment conditions and relations characterising jobs. The analyses are drawing on data from the 2005 European Working Conditions Survey. Results of Latent Class Cluster Analyses show that it is empirically and theoretically possible to reduce a multitude of factors determining the quality of employment into five different types of jobs regarding their employment quality: SER-like jobs, instrumental jobs, precarious unsustainable jobs, precarious intensive jobs and portfolio jobs. These five types of jobs are strongly related with important covariates such as the socio-demographic profile of workers, organisation level features and indicators of the intrinsic nature of work tasks. Moreover, they are clearly distributed differently between countries within the EU27. The findings from this innovative approach towards the quality of employment are discussed in terms of the implications for the measurement of contemporary employment arrangements in Europe.     

Perception of Prosodic Boundary Correlates by Newborn Infants

French newborn infants were shown to perceive acoustic correlates of phonological phrase boundaries in Spanish, with stress‐controlled stimuli. Access to phonological phrase boundaries may facilitate the acquisition of a lexicon, as well as some aspects of phonology and even syntax.     

Do Beveridgian pension systems increase growth?

In this paper, we explain why the structure of pension systems has an impact on the growth rate of an economy. Using a capital accumulation model, we show that the more a pension system is Beveridgian, the higher the growth rate of the economy is.