New patterns of delivering service in British Columbia.

A new approach to social services, including services to children, is being taken by the government of the New Democratic Party that assumed office in British Columbia in 1972.     

A Portfolio Approach to Procurement Contracts

The purpose of this paper is to develop a general framework for supply contracts in which portfolios of contracts can be analyzed and optimized. We focus on a multi‐period environment with convex contract, spot market, and inventory holding costs. We specialize the model to the case of a portfolio consisting of option contracts. We characterize the optimal replenishment policy and show that it has a simple structure. Namely, the use of every different option contract and the spot market is dictated by a modified base‐stock policy. In addition, we derive conditions to determine when an option is relatively attractive compared to other options or the spot market. Finally, we present our computational study, where we report the sensitivity of the results to the parameters of the model. Our experiments indicate that portfolio contracts not only increase the manufacturer's expected profit, but can also reduce its financial risk.     

Mandated reporting thresholds for community professionals

This study examines how community-based mandated reporters understand and interpret reasonable suspicion, the standard threshold for mandated reporting of suspected child abuse. Respondents were asked to identify the probability necessary for "suspicion of child abuse" to constitute reasonable suspicion. Data were analyzed for internal consistency, evidence of a group standard, and associations with professional and educational demographics. There was a 90.4% response rate (1,233/1,364). On both ordinal probability and estimated probability scales, respondents demonstrated wide variability in the thresholds they identified for what constitutes reasonable suspicion. Comparing individual responses for the two scales, 83% were inconsistent. Responses on the estimated probability scale were correlated with frequency of reporting child abuse, professional background, and prior education on child abuse. Lack of consensus in how community professionals interpret reasonable suspicion raises the question of whether more specific training is needed for this threshold to be understood, interpreted, and applied in a consistent manner.     

The Use of the Conceptual Category of Race in American Sociology, 1937–99

We examine how mainstream sociology has used race as an explanatory factor by examining papers in the American Sociological Review between 1937 and 1999. We find a dramatic increase in the likelihood that sociologists will take race into account, and we suggest that methodological innovations are largely responsible for creating an environment in which it is taken for granted that analysts in many fields will control for race. This pattern of usage may reinforce an implicit conception of racial differences that we call broad but shallow, in that race is expected to matter almost everywhere, but its effect can be neutralized by the addition of a control.     

Promotion,Turnover, and Compensation in the Executive Labor Market

This paper develops a generalized Roy model with human capital accumulation, moral hazard, and career concerns. We identify and estimate the model with a large panel that matches data on publicly listed firms to information on their executives. The structural estimates obtained are used to decompose the firm‐size pay gap. We find that although total compensation and incentive pay increase with firm size, certainty‐equivalent pay decreases with firm size. In larger firms, and for more highly ranked executives, weaker signal quality about effort results in higher risk premiums. This risk premium accounts for roughly 80 percent of the firm‐size gap in total compensation. Larger firms are also willing to pay more than smaller ones to attract executives. Finally, the estimated coefficients on human capital accumulation from formal education and experience gained from different firms are individually significant, but their collective effect on firm‐size pay differentials nets out.     

Optimal Expediting Policies for a Serial Inventory System with Stochastic Lead Time

In recent supply chains, often operating multiple delivery modes such as standard freight shipping and air is an effective way of addressing both delivery lead time uncertainties and service rates. We propose a model on how to optimally operate multiple delivery modes. We consider a serial supply chain and an expediting option from intermediate installations to the downstream of the chain. The goods move stochastically among the installations and the system faces a stochastic demand. We identify systems that yield simple optimal policies, in which both regular ordering and expediting follow a variant of the base stock policy. Expediting allows the system to be leaner due to the reduced regular order amount. In addition, we provide managerial insights linking expediting, base stock levels, and expediting costs based on analytical and numerical results.