The new public service mega-merger (Newstalk ZB)

(17 December 2025) Dr Oliver Hartwich discussed the government's plan to merge five ministries into one new mega-ministry. 

Closing the corporate tax loophole (Newstalk ZB)

(2 December 2025) Newstalk ZB's news carried Dr Oliver Hartwich's proposal to stop companies escaping their tax debts by folding and starting again under a new name. 

Let the Reserve Bank do its job (Newstalk ZB)

(24 September 2025) Newstalk ZB's news carried Dr Oliver Hartwich's call for politicians to let the Reserve Bank do its job. 

Defending the Reserve Bank against scapegoating (Radio NZ)

(23 September 2025) RNZ's Midday Business News reported Dr Oliver Hartwich's defence of the Reserve Bank against political scapegoating. 

Reining in public spending (Newstalk ZB)

 (3 September 2025) Dr Oliver Hartwich joined Leighton Smith on his podcast to discuss why the government must rein in the growth of public spending.

Trump's trade turmoil (Newstalk ZB)

(4 June 2025) Dr Oliver Hartwich discussed the global fallout from Donald Trump's tariffs with Heather du Plessis-Allan. 

The capital spending increase (Newstalk ZB)

(9 May 2025) Dr Oliver Hartwich told Ryan Bridge that the government's extra capital spending was a minor step and made the case for asset recycling. 

David Seymour's plan to cut ministerial portfolios (Newstalk ZB)

(2 May 2025) Newstalk ZB carried Dr Oliver Hartwich's support for David Seymour's plan to cut the number of ministerial portfolios. 

John MacDonald on cutting the number of ministers (Newstalk ZB)

(2 May 2025) On Canterbury Mornings, John MacDonald discussed Dr Oliver Hartwich's case for cutting the number of ministers and portfolios. 

Trade talks with the United States (Newstalk ZB)

 (16 March 2025) Dr Oliver Hartwich discussed New Zealand's trade relationship with the United States on Newstalk ZB's The Weekend Collective, after Trade Minister Todd McClay met his American counterpart Jamieson Greer.

Adrian Orr's resignation from the Reserve Bank (Newstalk ZB)

(6 March 2025) Newstalk ZB's news carried Dr Oliver Hartwich's comments on Adrian Orr's resignation as Governor of the Reserve Bank. 

Germany's election (Newstalk ZB)

(24 February 2025) Dr Oliver Hartwich discussed the German election result and Germany's economic troubles with Ryan Bridge. 

Invest New Zealand, the new foreign investment agency (Newstalk ZB)

(24 January 2025) Dr Oliver Hartwich discussed Invest New Zealand, the government's new foreign investment agency modelled on Ireland's IDA.