David Cunliffe would look at buying back any state owned assets sold under the National Government.
Mr Cunliffe and David Shearer are battling to convince caucus colleagues they're the best choice to take over from Phil Goff as Labour leader, as the countdown continues to a secret ballot on December 13.
The two next potential leaders went head to head again on TVNZ's Q + A programme this morning, discussing why they should lead the party.
Their opinions were also canvassed on a selection of policies, including public-private partnerships.
Mr Cunliffe said he wanted to make his position clear on National's plan to sell up to
49% of the country's energy assets - Solid Energy, Mighty River Power, Genesis - and a further sell-down of Air New Zealand.