WHY HOLD-UPS OCCUR: THE SELF-ENFORCING RANGE OF CONTRACTUAL RELATIONSHIPS

Court enforcement and private enforcement are not alternative contract enforcement mechanisms, but are used jointly by transactors to define the self-enforcing range of a contractual relationship. Within this framework contract terms economize on the limited amounts of private enforcement capital possessed by transactors, either by directly controlling transactor behavior or by shifting private enforcement capital between transactors to coincide with likely future market conditions. Hold-ups occur when market conditions change sufficiently to place the relationship outside the self-enforcing range. This probabilistic view of hold-ups is contrasted with opportunism more generally and with moral hazard behavior.     

Child Protection,Public Services and the Chimera of Market Force Efficiency

The different agencies and professions that contribute towards child protection services have all recently had to begin to take account of the impact of market forces on their activities, yet detailed consideration of the consequences of this are slow to emerge. This article begins to consider these changes for child protection services. Having briefly described the child protection systems in England and Wales, it looks at the theoretical underpinning to the market forces approach which has become a significant ideological position in respect of public services in the UK and increasingly throughout the world. The article then considers the impact of a market forces approach on the organization of child protection services in relation to coordination versus fragmentation, profit versus professionalism, planning versus short-termism, and cooperation versus competition. It concludes that the argument that a market forces approach to child protection will lead to greater efficiency in relation to protecting children is a chimera. The article is thus of relevance for the different professions who contribute to child protection services in all countries where a market approach to public welfare is being suggested or implemented.     

A constructivist approach to the help-seeking process of clients: A response to cultural diversity

The issue of cultural diversity presents clinicians with both delemmas and opportunities. To deal with such a challenge, I have proposed a constructivist approach to the help-seeking process of clients from diverse ethnoracial backgrounds. A model of clients' help-seeking processes provides a useful and systematic frame for clinicians to understand clients' construction of their problem situations and possible solutions. It provides a useful key for clinicians non-presumptuously to understand clients' subjective experiences, and to enhance clients' ability to resolve problems.     

Stochastic blockmodels: First steps

A stochastic model is proposed for social networks in which the actors in a network are partitioned into subgroups called blocks. The model provides a stochastic generalization of the blockmodel. Estimation techniques are developed for the special case of a single relation social network, with blocks specified a priori. An extension of the model allows for tendencies toward reciprocation of ties beyond those explained by the partition. The extended model provides a one degree-of-freedom test of the model. A numerical example from the social network literature is used to illustrate the methods.     

Suicide ideation,attempts and abuse among incarcerated gang and nongang delinquents

The present study examines suicide ideation and attempts as well as reported levels of physical and sexual abuse among gang and nongang-involved incarcerated youth. The self-report survey data were collected from 334 males and 61 females who were incarcerated in Nevada youth correctional facilities in the summer of 1994. Over half (58.3 percent) of the males and nearly half (45.2 percent) of the females reported being gang members. Surprisingly high rates of abuse (more than 70 percent for both physical and sexual abuse) were found among the incarcerated females of this study. Females reported significantly more suicide attempts and were more likely to have been physically and sexually abused than males. Nongang males reported significantly more suicide attempts and were more likely to report sexual abuse than gang-involved males. Among the gang-involved delinquents, females reported significantly more suicide attempts than males. In addition, gang members who reported sexual abuse were more likely to have higher levels of suicide ideationand to have attempted suicide. Implications for youth correction specialists and social workers are discussed.The data for this study were collected under Grant #000616 from the Nevada Agricultural Experiment Station.     

Bayes and empirical Bayes shrinkage estimation of regression coefficients

For a moderate or large number of regression coefficients, shrinkage estimates towards an overall mean are obtained by Bayes and empirical Bayes methods. For a special case, the Bayes and empirical Bayes shrinking weights are shown to be asymptotically equivalent as the amount of shrinkage goes to zero. Based on comparisons between Bayes and empirical Bayes solutions, a modification of the empirical Bayes shrinking weights designed to guard against unreasonable overshrinking is suggested. A numerical example is given.