We take apprentices first enrollment into apprenticeship (level 4, 100+ credit) course (trade defined by MOE derived occupation). From these apprentices, we calculate the time between their start and end date as their completion duration.
Yearly income of apprentices is tracked from IRD tax records, taking income earned over the whole year from construction businesses only. Monthly income is adjusted for months not working in that year. Real measures are adjusted to 2020Q1 based on wage inflation.
Income is average between groups fitting under different cut offs based on completion duration.
Access to the anonymised data used in this study was provided by Statistics New Zealand in accordance with security and confidentiality provisions of the Statistics Act 1975, and secrecy provisions of the Tax Administration Act 1994. The findings are not Official Statistics. The results in this paper are the work of the authors, not Statistics NZ, and have been confidentialised to protect individuals, households, businesses, and other organisations from identification. Read our full disclaimer here.