Comment vendre un produit incertain ? Activités de détachement et d’attachement d’une firme d’agrofourniture

This article examines the sales practices of a French agricultural supplies company whose products have uncertain qualities and contested effects. We show that this characteristic leads the sales technicians responsible for selling these products to develop arguments that make extensive use of a rhetoric aiming to detach the clients from their competitors. Given how difficult it is to establish an objective assessment of products’ intrinsic qualities, we also show how attachments are built around a broad-ranging solution that in particular includes providing consulting services for farmers. More generally, in the analysis of sales work, the commerce of these uncertain products invites one to think of processes of attachment and detachment in symmetrical terms.     

Lone mothers' time allocations: choices and satisfactions

This paper uses the 2006 Australian Time Use Survey to examine the allocation of time to personal care, employment‐related activities, home duties, leisure and child care of lone mothers, in comparison to the time allocations of single women, women in childless couples and partnered mothers. Both primary and secondary time allocations are considered. The satisfactions that women report concerning their current time allocations are also analysed. The time use and satisfaction data are described using both tabulations and multiple regression methods. Lone mothers are shown to have similar time allocations as the other types of households, even though they have different financial and time resources. This raises the concern that lone mothers' desire or need to maintain such time allocations may lead to task overload. Consistent with this, lone mothers are found to be less satisfied with the way they allocate their time than single women and partnered mothers. The tensions associated with time use among lone mothers discussed in the literature are real, and important.     

Optimal age of retirement and population growth

The purpose of this paper is to study intergenerational optimal resources sharing when the social planer can choose the retirement age in addition to consumptions and investment. We use the extension of the Diamond analysis by Hu [1979] that incorporates endogenous retirement age. We found that the optimal retirement age is an increasing function of the population growth rate if the elasticity of substitution of old agents' labor for young agents' labor is lower than one. In the millian case, when the size of a population does not matter, and when the elasticity of substitution of old agents' labor for young agents' labor is strictly higher than one, the optimal retirement age is a decreasing function of the population growth rate. In the benthamite case, the change in the optimal retirement age is indeterminate. Received: 19 February 1999/Accepted: 27 February 2001 All correspondence to Bertrand Crettez. We would like to thank Jean-Pierre Vidal for very helpful comments on an earlier draft. An anonymous referee provided insightful comments on a previous version of this paper. Responsible editor: Alessandro Cigno.     

A linear programming duality approach to analyzing strictly nonblocking <Emphasis Type="Italic">d</Emphasis>-ary multilog networks under general crosstalk constraints

When a switching network topology is used for constructing optical cross-connects, as in the circuit switching case, no two routes are allowed to share a link. However, if two routes share too many switching elements, then crosstalk introduced at those switching elements degrades signal quality. Vaez and Lea (IEEE Trans. Commun. 48:(2)316–323, 2000) introduced a parameter c which is the maximum number of distinct switching elements a route can share with other routes in the network. This is called the general crosstalk constraint. This paper presents a new method of analyzing strictly nonblocking multi-log networks under this general crosstalk constraint using linear programming duality.     

大学英语听力形成性评价实验研究

通过对某普通高校非英语专业新生进行的一项为期两年的以大学英语听力测试、调查问卷、课上观察、课下访谈为主要内容的听力形成性评价实验研究,提出了在大学英语课堂教学中实施听力形成性评价能使教、学、评有机结合,明显增强学生的听力形成性评价意识,并在某种程度上有助于提高学生的英语听力成绩,提高教学质量。     

群体性事件中的角色与互动:一个微观的视角

群体性事件的社会建构和评估过程可以被视为一场竞赛,参与者在其中扮演着各种角色,提供彼此竞争的观点。从微观的角度看,这些互动、冲突与协调都是社会的进程,带有强烈的情感色彩并被角色行为所塑造。风险在角色的互动过程中被重新定义,风险场域中的利益关系得以确认。     

Le marché comme rencontre d’activités de régulation : initiatives et innovations dans l’approvisionnement bio et local de la restauration collective

How to apply Jean-Daniel Reynaud's theory of social regulation to market relations? When applied to the results drawn from fieldwork on the supplying of organic and local produce to catering businesses serving public institutions in France, this grid of analysis shows that organizing this supply chain involves many activities of regulation. An explanation is provided about how hard existing regulations make it to search for local produce. Two contrasting cases show the degree to which the parties involved can skirt around existing regulations and also, use certain regulations to construct new ones. The innovative regulations that enter into application are qualified as being “joint”, since they stem from the efforts of the parties in catering and in agriculture to agree about how to organize transactions, which had previously been done through the work of market middlemen. In that case, instead of reasoning in terms of a pre-existing supply and demand, we have to understand how supply and demand gradually take shape through the process of working out regulations.