Operating income: income from total sales. It excludes interest/dividends received, donations, insurance claims, subsidies, government grants, exchange rate gains, extraordinary items, gains on sales of fixed assets, excise duties and bad debts. It includes sales of processed goods, sales of goods purchased for resale, sales of services, repair services, processing fees, management fees, rental income, leasing income, royalties and patent fees.
Total stocks: closing stocks of raw materials for use in production, plus the closing stocks of finished goods, work in progress, and trading stocks.
Stats NZ have made changes to the methodology used in the Wholesale Trade Survey beginning with the Wholesale Trade Survey: September 2015 quarter, released on 7 December 2015.
Under the old design, Stats NZ surveyed all the large businesses in each industry, plus a sample of medium-sized businesses. This was supplemented with modelled tax data for the smaller businesses.
Under the new design, Stats NZ use administrative data (goods and services tax (GST) data, sourced from Inland Revenue) wherever possible, and will supplement this by surveying only the largest and most complex businesses. The methodology changes have improved the quality of the published series.