The relative costs of taking employment or receiving welfare are usually understood through comparisons of a person’s social security entitlements and their wage alternative, known as replacement rates. In some situations it appears that the additional income from working is negligible, and...

With many countries considering the adoption of a system of earned income tax credits, it is useful to analyze how different types of credits affect labor supply and earnings. This paper focuses on a 1999 reform to the UK tax credit system, which increased the value of the credit and reduced the...

In the early 1980’s Australia had a highly progressive, individual based income tax and families received support for dependent children in the form of universal family allowances. The introduction of income tests for child support payments based on family income (now in the form of Family Tax...

In recent years, the US, UK and Australia have lowered tax rates on high incomes and expanded tax credits and family transfer payments that are withdrawn on the joint income of a couple. These reforms result in significant changes in the structure of marginal and average income tax rates. In...

This paper considers more major structural reforms which could address such problems in a systematic manner, and allow the implementation of a designed set of effective tax rates (ETRs) for social security clients and taxpayers.

This paper considers options for addressing problems in the way the tax and social security systems interact.

How are hourly wages affected by the Earned Income Tax Credit? Two strategies are utilized to determine the relationship between the credit and hourly wages. First, I use variation in state EITC supplements, which magnify the effect of the federal EITC. I find that a 10 percent increase in the...

Cross country comparisons of lifecycle labour supplies show that female hours of market work are significantly lower in Australia than in other comparable OECD countries, notably, the US, UK and Sweden. This paper argues that an explanation can be found in the rate structure of the Australian...

Should special pension provisions be offered to workers in harsh occupations? We address this question in an optimal tax setting where individuals differ in longevity and occupation. Longevity is private information but workers in harsh occupations have on average shorter lifes than workers in...

We study the optimal design of a social security system when individuals differ in health status and occupation. The health status is private information but is imperfectly correlated with occupation: individuals in harsh occupations have a higher probability of being in poor health. We explore...