Since the government broke an election promise and changed the stage three tax cuts, the Coalition has been warning there could be many more broken promises to come.  

Specifically, it says the tax incentive known as negative gearing is the next thing on the chopping block, although the government denies that. 

Today, Peter Martin, economics editor at The Conversation, explains what it is, whether we really need it and what a change could mean for the housing market. 

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Peter Martin, The Conversation economics editor