type="main" xml:id="jtsa12059-abs-0001" <title type="main">Abstract</title>We propose extensions of the Box–Pierce ([Box GE, 1970]) portmanteau autocorrelation test to allow for two generalizations: (i) time series that exhibit unconditional heteroskedasticity and (ii) to test for the presence of autocorrelation only...

This paper shows how fractional unit root tests originally derived under stationarity can be made robust to heteroskedasticity. This is done by using existing tests nested in a regression framework and then implementing these tests using White’s heteroskedasticity consistent standard errors...

This paper addresses the need for a measure of the uncertainty that is associated with the results calculated through tax policy behavioural microsimulation modelling. Deriving the analytical measure would be extremely complicated, therefore, a simulated approach is proposed which generates a...

This article uses the Melbourne Institute Tax and Transfer Simulator to examine the effects of a reduction in the means-tested benefit taper, or withdrawal, rates in Australia to 30 per cent. That is, all taper rates of 50 per cent and 70 per cent in the March 1998 benefit system are reduced to...

This paper addresses the need for a measure of the uncertainty that is associated with the results calculated through tax policy behavioural microsimulation modelling. Deriving the analytical measure would be extremely complicated. Therefore, a simulated approach is proposed which generates a...

This paper uses the Melbourne Institute Tax and Transfer Simulator to examine the effects of the New Tax System introduced in Australia in July 2000. First the whole set of changes is studied and then some of its components are discussed separately. From the results it is clear that the change...

This paper illustrates the use of the Melbourne Institute Tax and Transfer Simulator (a behavioural microsimulation model) in examining the impact of two hypothetical policy changes to Family Payments as they were in the March 1998 tax and transfer system. The effects of the policy changes on...