Capital
Capital input comes from two sources: Statistics New Zealand’s Annual Enterprise Survey (AES) and the Financial statements summary - IR10 submissions to Inland Revenue. The former is a collection designed to support the construction of the national accounts (e.g. GDP). The latter is used by Inland Revenue to evaluate tax compliance risk, as well as to form policy and for strategic research. It is also used by SNA to supplement the AES in construct the national accounts.
Because these are collected for different purposes, one must be careful when creating measures of capital.
Fabling and Maré capital services measure.
Fabling and Mare (2015 and 2019) measure capital inputs by estimating a flow of capital services used by the firm in a year. This is the sum of three components:
depreciation
rental and leasing costs
cost of borrowing
Data on capital stocks are also available, based on the book value of assets reported in the AES and IR10, and have been harmonised across sources as detailed in Fabling and Maré (2019). This harmonisation results in 4 broad classes of fixed assets (Vehicles; Plant and Machinery (including other fixed assets); Furniture and fittings; and Land and buildings) and one variable capturing intangible assets.
For more details on what make up each of these components, see section 4.3 of Fabling and Mare (2015).
