Economics ?: What are some factors that contribute to shifts in the aggregate supply and demand in australia?

I need help. Answer only if you know something about macroeconomics. What are some factors that seem to contribute to the shifts in the aggregate supply and/or demand of australia? What are the effects on prices and/or output? I NEED WEBSITES TO BACK IT UP.

Answer:
"A change in any variable that is presumed to increase nominal GDP will shift this unit elastic demand curve to the right and any event that lowers nominal GDP will shift the schedule to the left. If you are a Keynesian a simple multiplier model such as equation (3) in Essay 1 can be used to show that an increase in government expenditure, other things equal, will shift the demand curve to the right and that an increase in taxes will shift it to the left."

This is from the University of New York at Albany website:
http://www.albany.edu/~renshaw/leading/e...

It works the same in Australia as it does in the US. That webpage has lots more.

Or check it out here:
http://www.sparknotes.com/economics/macr...
With useful visuals!
Enjoy!
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