Facebook,Google,Amazon,and other large technology firms face criticism for cutting their tax bills by booking profits in low-tax countries.
Trade Minister Simon Birmingham will tell the G20 that the recent re-election of governments in Australia,India and Indonesia is the best chance in a generation to secure an EU-style free-trade agreement across Asia.
Treasurer Josh Frydenberg says political volatility and trade tensions have led to the most significant shift in the global environment since the 1980s.
American companies have been warning of higher prices for consumers as a result of the trade war with China.
Policy makers from the Group of 20 industrialised countries are worried that the weakness evident in key economies could spread.
The Queensland police operation for G20 was praised for its low rate of arrests,but new research found a potential downside to the approach.
The positive meeting between US President Donald Trump and Chinese President Xi Jinping is set to be the catalyst for a December rally in Australian shares.
At first the world laughed at Australia's political instability,but more serious consequences are emerging as international summit season comes to an end.
As he arrives home from Argentina,the Prime Minister faces another row within the Liberal Party.
World leaders have salvaged an agreement on trade at a global summit that witnessed sharp differences on security,calling for reform to international trade rules in a bid to ease tensions between China and the United States.
Justin Trudeau asked the Saudi crown prince directly about the murder of Jamal Khashoggi,Emmanuel Macron remonstrated with him and Theresa May urged him to comply with a full investigation.