new zealands commerce regulator will get new powers allowing it to compel supermarket operators to hand over information about land banking and other practices that prevent potential competitors from operating the government said tuesday the planned change is part of efforts to boost competition in the grocery industry which is dominated by woolworths ltd and franchises under the foodstuffs cooperative were cracking down on the anticompetitive land wars weve seen for years where the supermarkets have been allowed to buy up land or dictate the terms of leases to block their competitors from getting a foothold in a neighbourhood said commerce and consumer affairs minister david clark in a statement among the organization for economic cooperation and development group of wealthy nations new zealands grocery prices were fourth highest when considered as a proportion of income the commerce commission said last year following a study of the grocery market