Key independent MP Bob Katter says he did not bother to attend briefings on offer by prominent economists Ross Garnaut and Nicholas Stern because they are "lightweights".

In outspoken comments on ABC Radio this morning, Mr Katter also branded climate change scientists as "stupid" and said he was within a "hair's breadth" of deciding which party to throw his support behind.

Mr Katter and his fellow independents are attending dozens of meetings with department officials and ministers this week before deciding which party they will support to form a minority government.

Ross Garnaut authored the Government's climate change review, which formed the basis of its emissions trading scheme, and Sir Nicholas Stern released a landmark 2006 report for the British government on the impact of climate change on the economy.

Crossbenchers Robb Oakeshott and Tony Windsor met the pair yesterday but Mr Katter says he skipped the meetings.

"I think their positions are fairly lightweight," he told AM.

"I've heard their viewpoint many times, and I simply disagree with them dramatically.

"Just to indicate how stupid those people are, there is a very unassailable scientific case that there will be a problem arising in the oceans. They don't mention that."

The three independents will today meet with heads of several departments before spending the afternoon with Treasury and Finance secretaries Ken Henry and David Tune.

Eleven days have now passed since the election, with neither major party yet able to secure a 76-seat majority.

Mr Katter says he is within a "hair's breadth" of making a decision but Mr Oakeshott and Mr Windsor have warned that a final resolution will still take some time.

Mr Windsor says the trio are working through the process they set up last week.

"I know everyone wants a quick result but the poll hasn't been declared yet," he said.

"Even if we made a decision today there wouldn't be a government formed for some weeks."

Mr Oakeshott says draft formal agreements are "bouncing around" but it is still "early days".

The fourth independent from Tasmania, Andrew Wilkie, has received an offer from Prime Minister Julia Gillard but is yet to make up his mind.

Newly elected Greens MP Adam Bandt is more than likely to support a Gillard led-government.