Relational collaboration among spatial multipoint competitors

The presence of network ties between multipoint competitors is frequently assumed but rarely examined directly. The outcomes of multipoint competition, therefore, are better understood than their underlying relational mechanisms. Using original fieldwork and data that we have collected on an interorganizational network of patient transfer relations within a regional community of hospitals, we report and interpret estimates of Exponential Random Graph Models (ERGM) that specify the probability of observing network ties between organizations as a function of the degree of their spatial multipoint contact. We find that hospitals competing more intensely for patients across multiple geographical segments of their market (spatial multipoint competitors) are significantly more likely to collaborate. This conclusion is robust to alternative explanations for the formation of network ties based on organizational size differences, resource complementarities, performance differentials, and capacity constraints. We show that interorganizational networks between spatial multipoint competitors are characterized by clear tendencies toward clustering and a global core-periphery structure arising as consequences of multiple mechanisms of triadic closure operating simultaneously. We conclude that the effects of competition on the structure of interorganizational fields depends on how markets as physical and social settings are connected by cross-cutting network ties between competitors.     

Interval estimators for reliability: the bivariate normal case

This paper proposes procedures to provide confidence intervals (CIs) for reliability in stress–strength models, considering the particular case of a bivariate normal set-up. The suggested CIs are obtained by employing either asymptotic variances of maximum-likelihood estimators or a bootstrap procedure. The coverage and the accuracy of these intervals are empirically checked through a simulation study and compared with those of another proposal in the literature. An application to real data is provided.     

Is there such a thing as a family constitution? A test based on credit rationing

The paper tests the hypothesis that private transfers can be explained by the existence of self-enforcing family constitutions prescribing the minimum level at which a person in middle life should support her young children and elderly parents. The test is based on the effect of a binding credit ration on the probability of making a money transfer, which can be positive only in the presence of family constitutions. Allowing for the possible endogeneity of the credit ration, we find that rationing has a positive effect on the probability of giving money if the potential giver is under the age of retirement, but no significant effect if the person is already retired. This appears to reject the hypothesis that transfer behavior is the outcome of unfettered individual optimization on the part of either altruistic or exchange motivated agents, but not the one that individuals optimize subject to a self-enforcing family constitution. The policy implications are briefly discussed.

Luck or cheating? A field experiment on honesty with children

We run an experiment to study the relationship between honesty, age and self-control. We focus on children aged between 5 and 15 as the literature suggests that self-control develops within such age range. We ask each child to toss a fair coin in private and to record the outcome (white or black) on a paper sheet. We only reward children who report white. Although we are unable to tell whether each child was honest or not, we speculate about the proportion of reported white outcomes. Children report the prize-winning outcome at rates statistically above 50% but below 100%. Moreover, the probability of cheating is uniform across groups based on child’s characteristics, in particular age. In a second treatment we explicitly tell children not to cheat. This request has a dampening effect on their tendency to over-report the prize-winning outcome, especially in girls. Furthermore, while this effect in boys is constant with age, in girls it tends to decrease with age.     

Correction to: Assessment of agricultural sustainability in European Union countries: a group-based multivariate trajectory approach

AStA Advances in Statistical Analysis -     

Strategic approaches to sustainability in fashion supply chain management

Today, the sustainability challenge has become a relevant issue in the fashion industry. However, given that the request for sustainability is relatively new in this industry, empirical research that could guide companies towards supply chain sustainability is lacking. This study aims to deepen the understanding of the main strategic approaches to sustainability used in fashion supply chain management (SCM). Ten case studies were examined in terms of the practices that characterise these approaches. Moreover, contextual factors, drivers and barriers that support or hinder different approaches were identified. To accomplish this goal, both environmental sustainability and social sustainability were investigated, and all the areas of fashion SCM (i.e. new product development, source, make, deliver, retail, return, governance) were considered simultaneously to offer a wide overview of this industry’s sustainability issue.     

Learning from mistakes in social work

A growing number of cases of professional errors in the realm of health and social services appear on media and raise significant public debate. This article focuses on mistakes in social work and looks at how their negative impacts might be reduced through the lens and framework of reflective practice. Using conclusions from the most relevant literature on this topic and some of the outcomes of recent research, the author describes errors in social work in terms of causes (e.g. lack of time and training, etc.) and results (e.g. damaged relationship with users, failure of action plans, burnout, etc.). Learning occurs when social workers conduct an in-depth reflection, alone or together with colleagues. Since human beings will always err, paradoxically reflection on mistakes (with the consequent drop in the harm produced) and not the reduction of their number is the most powerful factor to improve the quality of health and social services. The culture of blame and punishment is one of the main obstacles to an effective social work animated by the genuine culture of responsibility and ethically driven by the overriding interest of service users.     

Off-farm labour decision of Canadian farm operators: Urbanization effects and rural labour market linkages

Understanding the factors affecting off-farm labour decisions of census-farm operators has significant implications for rural development and farm income support policy. We examine the off-farm labour decisions of Canadian farm operators using micro-level data from the 2001 Census of Agriculture combined with community level data from the 2001 Census of Population. While confirming some of the findings of previous research with respect to the effects of human capital and farm characteristics on off-farm work participation, this study shows the differential impact of those variables for operators of smaller and larger holdings. Family, community and regional characteristics appear more relevant in determining the joint decision to work off-farm and operate a smaller holding, compared to the decision to work off-farm and operate a larger farm. Results suggest that, once other factors are accounted for, proximity to urban centres does not have a positive effect on the joint decisions to participate in off-farm work and to operate a holding. This joint decision, in fact, is more related to the dynamics of the local labour market. A major implication of these findings is that while urban centers might represent an engine of growth for overall rural income through employment opportunities for the non-farm workforce, the non-farm income of farm operators is more likely to be affected by policy initiatives that address directly the dynamics of labour markets in the community where the operator lives.     

Search and Taxation in a Model of Underground Economic Activities

We develop a simple model of an economy with underground production and trade. Because of the furtive nature of underground activities, information about trading opportunities in the irregular sector is less than perfect—hence, agents devote some time to locate trading partners in the black economy and then bargain over the terms of trade. The model stresses how individual involvement in underground economic activities is related to earnings capacity. It also highlights how taxes and tax enforcement are natural policy complements. Both results are argued to be useful when interpreting micro- and aggregate-level data on underground economic activities. (JEL H26 , H21 , D72 , D83 )