Multiple-output quantile regression through optimal quantization

A new nonparametric quantile regression method based on the concept of optimal quantization was developed recently and was showed to provide estimators that often dominate their classical, kernel-type, competitors. In the present work, we extend this method to multiple-output regression problems. We show how quantization allows approximating population multiple-output regression quantiles based on halfspace depth. We prove that this approximation becomes arbitrarily accurate as the size of the quantization grid goes to infinity. We also derive a weak consistency result for a sample version of the proposed regression quantiles. Through simulations, we compare the performances of our estimators with (local constant and local bilinear) kernel competitors. The results reveal that the proposed quantization-based estimators, which are local constant in nature, outperform their kernel counterparts and even often dominate their local bilinear kernel competitors. The various approaches are also compared on artificial and real data.     

Un plafond à caissons : les femmes à l’EHESS

The feminization of employment at the École des hautes études en sciences sociales (EHESS) in Paris has fallen off after an early start and it remains low. This is not to be set down so much to the formally discriminating nature of the recruitment examination (concours) as to competition, the accumulation of social capital and the methods for producing job applications. The initial feminization owed much to long inhouse careers, as women were recruited without sitting for an examination but into subordinate positions from which they could move upwards. This trend came to a halt as this channel of recruitment was shut down and a more elitist, relational and competitive one was opened that leads fewer women to enter job applications. The situation is not a stalemate however. A group of women professors has managed to place the gender question on the agenda and this seems to have given a (weak) boost to feminization.     

Social stereotypes,personality traits and regional perception displaced: Attitudes towards the ‘new’ quotatives in the U.K.1

This article investigates the attitudes of British respondents towards the quotatives be like and go. The results of a matched guise test and a social attitudes survey are presented and compared with the findings of studies on be like and go‐perception in the U.S. It is found that the perceptual load of the two quotatives on both sides of the Atlantic is similar in some respects and different in others. This effectively means that, in cases of borrowing, the stereotypes attached to linguistic items are not simply taken over along with the surface item. Rather, the adoption of global resources is a more agentive process, whereby attitudes are re‐evaluated and re‐created by speakers of the borrowing variety. It is suggested that attitudinal information presents an important backdrop to distributional studies in cases of global language trends.     

女性问题的多元化：21世纪女权主义干预的机遇与挑战

最近15年内（1990-2005），女权主义干预的发展呈现出越来越突出的种族中心主义特质；由于导致妇女面临的问题和受压迫地位的原因是复杂的，以及妇女作为一个整体具有异质性，因此，女权主义干预应当引入多元化的要素，有针对性地分析并解决妇女面临的问题。     

Managing Socially-Responsible Buying:: How to Integrate Non-economic Criteria into the Purchasing Process

Companies are increasingly scrutinized by various audiences and are made accountable not only for their internal practices, but also for their suppliers’ behavior. Many purchasing managers and executives are not accustomed to seeing the purchasing function receive so much attention from different parties. As a result, a number of them do not know how to embrace the trend toward socially responsible buying (SRB). The present paper offers a helping hand by (1) shedding some light on the nature of SRB and (2) explaining how companies can incorporate social responsibility criteria into their purchasing decisions.