Reference

Data Sets
Belgium	Data contains Household Consumption (C) and GDP (Y) for Belgium from 1969 to 1998.
Japan	Data contains Household Consumption (C) and GDP (Y) for Japan from 1978 to 2007.
Srilanka	Data contains Household Consumption (C) and GDP (Y) for Sri Lanka from 1978 to 2006.
Core anlaysis function
Japan	Data contains Household Consumption (C) and GDP (Y) for Japan from 1978 to 2007.
supmz()	Detecting Structural Change with Heteroskedasticity