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Australians might soon be expected to tip as frequently and generously as Americans, new research warns.

Distinguished Australian historian Professor Geoffrey Blainey will be awarded the University of Melbourne's inaugural Tucker Medal, in recognition of his substantial contributions to the University, the Faculty of Arts and to public life.

Professor Marcia Langton says while Native Title agreements have created wealth for Aboriginal communities, government restrictions on trust-funds are holding back Aboriginal business enterprise and the associated long-term benefits for communities.

Dr David Malet says it's possible that the attack in Kenya is a sign of weakness, showing that al-Shabaab is unable to fight for control in Somalia. However, he says it could also mean that the group is gaining more strength.