Gender relations and the family farm in Western Europe

The paper focuses upon the impact of changing relations between farmers and spouses in the context of the restructuring of the rural economy and increasing female participation in labour markets. It is based upon a study of the connections between the succession process in agriculture and family relationships [Blanc, M. and Perrier-Cornet, P. (1989) Renouvellement des forces de travail et formes de production familiales en agriculture (les installations d'agriculteurs au cours de la decennie soixante-dix). Montpellier, INRA, Departement d'Economie et de Sociologie Rurales, Montpellier]. It argues that for farmer's wives, off-farm work, participation in other farm-based enterprises and occupational status result from a negotiation of power relations within the farm operating couple. Such changes are bringing about a distinct form of pluriactivity among farm families, with an emerging trend towards husbands being occupied full-time on-farm and wives off-farm.The paper deals with the future of family farming in connection with these changes. The role played by the ideology of family farming in sustaining these emerging forms of production is examined. The individuation of aspirations, especially for women, is considered an important factor in terms of labour market involvement. However, it is argued that the resolution of the impact of such changes on the domestic sphere and the farm is dependent upon a process of negotiation between the farmer and spouse.     

An empirical comparison of EM,SEM and MCMC performance for problematic Gaussian mixture likelihoods

We compare EM, SEM, and MCMC algorithms to estimate the parameters of the Gaussian mixture model. We focus on problems in estimation arising from the likelihood function having a sharp ridge or saddle points. We use both synthetic and empirical data with those features. The comparison includes Bayesian approaches with different prior specifications and various procedures to deal with label switching. Although the solutions provided by these stochastic algorithms are more often degenerate, we conclude that SEM and MCMC may display faster convergence and improve the ability to locate the global maximum of the likelihood function.     

Do infants express discrete emotions? Adult judgments of facial,vocal, and body actions

Adult judges were presented with videotape segments showing an infant displaying facial configurations hypothesized to express discomfort/pain, anger, or sadness according to differential emotions theory (Izard, Dougherty, & Hembree, 1983). The segments also included the infant's nonfacial behavior and aspects of the situational context. Judges rated the segments using a set of emotion terms or a set of activity terms. Results showed that judges perceived the discomfort/pain and anger segments as involving one or more negative emotions not predicted by differential emotions theory. The sadness segments were perceived as involving relatively little emotion overall. Body activity accompanying the discomfort/pain and anger configurations was judged to be more jerky and active than body activity accompanying the sadness configurations. The sadness segments were accompanied by relatively little body movement overall. The results thus fail to conform to the predictions of differential emotions theory but provide information that may contribute to the development of a theory of infant expressive behavior.This article is based on the second author's master's thesis. The authors thank Dennis Ross for his expert assistance in the data analyses.     

Consumer brand categorization for durables with limited problem solving: An empirical test and proposed extension of the Brisoux-Laroche model

This paper examines the Brisoux-Laroche consumer brand categorization process which conceptualizes the ceoked, hold, reject, and foggy sets. In contrast to previous studies of this model in routinized response situations, this study involves a durable good in a limited problem-solving situation. The results of this study provide (1) further support for the existence and uniqueness of the four hypothesized sets; (2) information regarding the importance of various product-specific attributes and insights into how these attributes are utilized in the brand categorization process; and (3) evidence that order effect bias is negligible. Furthermore, analysis of the results of this sluily and a previous study of brand categorization led to a modified Brisoux-Laroche model for limited and extensive problem-solving situations.     

Acyclicity and the dispersion of the veto power

Blair and Pollak (Econometrica (1982) 50: 931–943) prove that, if there are more alternatives than individuals, then, for every arrovian binary decision rule that is acyclic, there is at least one individual who has a veto power over a critical number of pairs of alternatives. If the number of individuals is larger than the number of alternatives, there need not be single vetoers but there could be small coalitions endowed with a similar power. Kelsey (Soc Choice Welfare (1985) 2: 131–137) states precise results in this respect. In this paper, we first give a new and much simpler proof of the main result of Blair and Pollak and complete proofs of the generalization of this result by Kelsey. Then we give a precise answer as to the minimum size of the coalitions that must have a veto power under any acyclic binary decision rule and the minimum number of pairs of alternatives on which these coalitions may exercise their power. We also show that, if the veto power of the coalitions of the minimal size attainable under the last objective is limited to the minimum number of pairs of alternatives, then all larger coalitions have a veto power on all pairs. All the results are obtained by appealing to an acyclicity condition found by Ferejohn and Fishburn (J Econ Theory (1979) 21: 28–45). In the case of symmetric and monotonic binary decision rules, proofs are even easier and illustrate clearly the reasons for the veto power.     

Infant “surprise” expressions as coordinative motor structures

This study found that the facial action of moderately or widely opening the mouth is accompanied by brow raising in infnats, thus producing surprise expressions in non-surprise situations. Infants (age = 5 months and 7 months) were videotaped as they were presented with toys that they often grasped and brought to their mouths. Episodes of mouth opening were identified and accompanying brow, nose, and eyelid movements were coded. Results indicated that mouth opening is selectively associated with raised brows rather than to other brow movements. Trace levels of eyelid raising also tended to accompany this facial configuration. The findings are discussed in terms of a dynamical systems theory of facial behavior and suggest that facial expression cannot be used as investigators' sole measure of surprise in infants.This research was conducted as part of the second author's undergraduate honors program project and was supported in part by a grant from the NICHHD #1RO1 HD 22399-A3 awarded to G. F. Michel.     

Group decision making under uncertainty a note on the aggregation of “ordinal probabilities”

This paper is a first attempt to study the problem of aggregation of individual ordinal probabilistic beliefs in an Arrowian framework. We exhibit some properties an aggregation rule must fulfil; in particular we prove the existence of a quasi-dictator.     

The impact of policy measures and coaching on the availability and accessibility of early child care: A longitudinal study

We conducted a study of changes in the availability, accessibility and enrolment of children from low‐income, single‐parent and ethnic minority families in early child care centres. The study was carried out in Brussels which offers unique possibilities to study accessibility in a context in which quality and costs are controlled across centres. A survey on access policies in 89 day care centres, and on 150 mothers regarding their search process, was complemented by two focus groups attended by centre directors. The results were compared with data from a similar study we conducted in 2005. The results show that while inequality in availability has remained, centre directors' awareness of social priority criteria has changed, resulting in a significant increase in the enrolment of children from single‐parent and ethnic minority families, and – to a lesser extent – an increase in the enrolment of children from low‐income families. The results support the hypothesis that policy measures, combined with support, can influence inequalities in enrolment rates.     

Quantitative Risk Assessment of Haemolytic and Uremic Syndrome Linked to O157:H7 and Non‐O157:H7 Shiga‐Toxin Producing Escherichia coli Strains in Raw Milk Soft Cheeses

Shiga‐toxin producing Escherichia coli (STEC) strains may cause human infections ranging from simple diarrhea to Haemolytic Uremic Syndrome (HUS). The five main pathogenic serotypes of STEC (MPS‐STEC) identified thus far in Europe are O157:H7, O26:H11, O103:H2, O111:H8, and O145:H28. Because STEC strains can survive or grow during cheese making, particularly in soft cheeses, a stochastic quantitative microbial risk assessment model was developed to assess the risk of HUS associated with the five MPS‐STEC in raw milk soft cheeses. A baseline scenario represents a theoretical worst‐case scenario where no intervention was considered throughout the farm‐to‐fork continuum. The risk level assessed with this baseline scenario is the risk‐based level. The impact of seven preharvest scenarios (vaccines, probiotic, milk farm sorting) on the risk‐based level was expressed in terms of risk reduction. Impact of the preharvest intervention ranges from 76% to 98% of risk reduction with highest values predicted with scenarios combining a decrease of the number of cow shedding STEC and of the STEC concentration in feces. The impact of postharvest interventions on the risk‐based level was also tested by applying five microbiological criteria (MC) at the end of ripening. The five MCs differ in terms of sample size, the number of samples that may yield a value larger than the microbiological limit, and the analysis methods. The risk reduction predicted varies from 25% to 96% by applying MCs without preharvest interventions and from 1% to 96% with combination of pre‐ and postharvest interventions.