Simple Efficient Contracts in Complex Environments

This paper studies a general model of holdup in a setting encompassing the models of Segal (1999) and Che and Hausch (1999) among others. It is shown that if renegotiation is modeled as an infinite‐horizon noncooperative bargaining game, then, with a simple initial contract, an efficient equilibrium will generally exist. The contract is robust in the sense that it does not depend on fine details of the model. The contract gives authority to one party to set the terms of trade and gives the other party a nonexpiring option to trade at these terms. The difference from standard results arises because the initial contract ensures that the renegotiation game has multiple equilibria; the multiplicity of continuation equilibria can be used to enforce efficient investment.     

Cross-system data linkage for treatment outcome evaluation: lessons learned from the California Treatment Outcome Project

Using administrative data to evaluate health care outcomes has become increasingly common, but the reliability and validity of outcome measures based on cross-system data linkage have been little scrutinized. Applying a deterministic data matching methodology, we linked 6545 Californians admitted to 43 substance abuse treatment programs between 2000 and 2001 to administrative data acquired from three state agency databases. We compared self-reported treatment outcome measures to equivalent measures derived from official records on motor vehicle driving incidents, criminal history, and mental health services utilization. Administrative data provided analogous results in some measures (e.g., percent of people using mental health services, percent ever arrested) and more accurate results in others (e.g., frequency of service utilization, and frequency of arrests). Similar to findings based on the interview data, the administrative data also revealed improvements in several domains 1-year post-treatment compared to 1-year pre-treatment. Experiences with data linkage procedures and strategies for enhancing record linkage accuracy are discussed. Findings illustrate the value of using administrative records for substance abuse treatment outcome evaluation, while highlighting areas for improvement for future cross-system data linkage efforts.     

Lone mothers,workfare and precarious employment: Time for a Canadian Basic Income?

Abstract   The growth of precarious employment poses significant challenges to current social assistance income support policies yet it remains largely neglected in policy-making arenas. Drawing upon qualitative data from a study in Ontario, Canada, this paper examines the particular implications of these challenges for lone mothers, who figure prominently both in non-standard employment and as targets for workfare policies. In the context of changing labour markets, the article considers the potential strengths and limitations of Basic Income approaches to achieving economic security for lone mothers.     

The Role of Gesture in Children's Comprehension of Spoken Language:Now They Need It, Now They Don't

Two experiments investigated gesture as a form of external support for spoken language comprehension. In both experiments, children selected blocks according to a set of videotaped instructions. Across trials, the instructions were given using no gesture, gestures that reinforced speech, and gestures that conflicted with speech. Experiment 1 used spoken messages that were complex for preschool children but not for kindergarten children. Reinforcing gestures facilitated speech comprehension for preschool children but not for kindergarten children, and conflicting gestures hindered comprehension for kindergarten children but not for preschool children. Experiment 2 tested preschool children with simpler spoken messages. Unlike Experiment 1, preschool children's comprehension was not facilitated by reinforcing gestures. However, children's comprehension also was not hindered by conflicting gestures. Thus, the effects of gesture on speech comprehension depend both on the relation of gesture to speech, and on the complexity of the spoken message.     

Do couples share income? Variation in the organisation of income in dual‐earner households

This paper examines the organisation of income of cohabiting and married dual‐income couples. This topic has gained significance as women increase their participation in the labour force, and increasingly bring additional money into the household. Given the increase in cohabitation, researchers have proposed that financial arrangements may differ according to relationship type. We model the effect of relationship type and previous relationship experience using data from a nationally‐representative survey from Australia. The effect of other factors related to the individual and household, such as length of relationship, educational background, home ownership and presence of children, is also explored. We find income organisation varies by whether the person is legally married or cohabiting, which we attribute to the institution of marriage.     

BURR CRITICAL VALUE APPROXIMATIONS FOR TESTS OF AUTOCORRELATION AND HETEROSCEDASTICITY

The paper evaluates the accuracy of Burr approximations of critical values and p-values for test a of autocorrelation and heteroscedasticity in the linear regression model.