We analyze the asymptotic distributions associated with the seasonal unit root tests of the Hylleberg et al. (1990) procedure for quarterly data when the innovations follow a moving average process. Although both the t- and F-type tests suffer from scale and shift effects compared with the...

A simulation assisted learning method is introduced to deal with students’ misconceptions concerning the properties of estimators; bias, efficiency and consistency. The design of the exercise is based on cognitive conflict theory, i.e. the simulations provide contradictory information to...