The Labour Market Impact of the Working Families' Tax Credit

In October 1999, the working families' tax credit (WFTC) replaced family credit as the main package of in‐work support for families with children. Among a range of stated aims, the WFTC is intended to‘… improve work incentives, encouraging people without work to move into employment'. In this paper, we consider the impact of WFTC on hours and participation. To simulate labour supply responses, we use a discrete behavioural model of household labour supply with controls for fixed and childcare costs, and unobserved heterogeneity. In simulation, we experiment with a number of scenarios regarding the take‐up of the credit, entry wage level and hourly childcare price. We find participation rates among single mothers to increase by around 2.2 percentage points for the base‐case scenario, while for married women participation rates are modelled to fall. Our simulation results indicate a small increase in overall participation of around 30,000 individuals.     

The Impetus for (and Limited Power of) Business Self‐Regulation: The Example of Advergames

When people complain, government agencies often respond. When regulations are threatened, businesses often offer reassurances that the problems can be handled with a self‐regulation code. However, past analyses of the power of self‐regulation find that while companies' voluntary adherence to self‐defined guidelines may effect some change in the activities of some companies, the inherent limitations of self‐regulation in the United States may restrict its ability to actually halt or control the undesired practices of others. The recent response by major food manufacturers and marketers to criticism of online games is an example of this mix.     

Detecting Earnings Management: A New Approach

This paper provides a new approach to test for accrual‐based earnings management. Our approach exploits the inherent property of accrual accounting that any accrual‐based earnings management in one period must reverse in another period. If the researcher has priors concerning the timing of the reversal, incorporating these priors can significantly improve the power and specification of tests for earnings management. Our results indicate that tests incorporating reversals increase test power by around 40% and provide a robust solution for mitigating model misspecification arising from correlated omitted variables.