The A-ordningen is employers' monthly reporting of all employment relationships to the authorities; we use it via microdata.no, provided by SSB. The sample is all private-sector wage earners, ages 21–60. The reference period for each month is the week containing the 16th. The “Canaries sample” is the 397 STYRK-08 occupation codes that have an exposure score; it covers the large majority of private-sector employment.

Each occupation (four-digit STYRK-08) is linked to the exposure measure “beta” from Eloundou et al. (2024, Science) via the occupation classifications ISCO-08 and SOC. Beta measures the share of an occupation's tasks that can be performed substantially faster with large language models and associated software. The quintiles are equally weighted per occupation (not employment-weighted), the same construction as in the DEL dashboard. The usage groups in figures 9–11 are instead based on observed use: the share of the occupation's Claude requests classified as automating or augmenting in the Anthropic Economic Index (Handa et al. 2025), grouped as in Brynjolfsson, Chandar and Chen (2025).

Employment is the number of wage earners in the group. New hires is the number of jobs with a registered start date in the window between the previous and current monthly reference date; the series is strongly seasonal, so a moving average or seasonally adjusted view is recommended. Pay is the group's average monthly cash pay, scaled up to full-time equivalent (FTE) using each occupation-age cell's average contracted hours — so a part-time position counts as its share of a full-time year and pay changes are not conflated with changes in working time; the pay series are nominal. All series are indexed to 100 in the reference month (November 2022, or February 2025 when Claude Code is selected).

Norwegian labor market series have strong seasonal variation (among other things the January dip in the A-ordningen and the summer peak in new hires). The seasonal adjustment is a transparent X-11 core, computed separately for each series:

1. The series is taken in logarithms, so the seasonal pattern is treated as multiplicative.
2. The trend is estimated with a centered 2×12 moving average (13 months, half weight on the endpoints), which is seasonally free by construction.
3. The seasonal factor for each calendar month is the average of the deviations from the trend for that month, normalized to sum to zero — the adjustment does not shift the level.
4. The factors are estimated on January 2021–December 2024 and then frozen: new months do not change history (releases are stable vintages), and any AI effect after 2024 cannot leak into the seasonal factors and be adjusted away.

Built-in check: twelve-month changes compare the same calendar month and are seasonally free by construction; in the current release they are practically identical computed on raw and seasonally adjusted series (correlation 1.000).

The population grows differently across age groups, so pure headcount series mix labor-market changes with demographics: a group can have more employed simply because there are more people of that age. The per capita variants therefore divide the number employed by the resident population in the same age group (SSB table 07459, quarterly figures interpolated to month; for series covering all ages, the combined population aged 21–60 is used). The index then measures jobs per person — the employment rate — rather than the number of jobs. Example: young and old in combined headcount figures can look very different even when their employment rate develops the same way.

The smoothing is a centered moving average over 3 or 6 months, computed in the browser. At the endpoints the available part of the window is used, so the most recent month is always shown. Smoothing and seasonal adjustment can be combined freely; the default view is seasonally adjusted with a 6-month average.

DEL uses a balanced panel of ~25,000 U.S. firms with ADP payroll data; we use the entire Norwegian population of private-sector wage earners without sample selection. Our age groups are decade groups (theirs are finer). The composition is very different: in the ADP panel 66 percent of employment sits in the two most exposed quintiles, in Norway about 40 percent. Aggregate cross-country comparisons must take this into account. DEL publishes only raw series; the seasonal and population adjustments are our additions, and our raw series reproduce their method exactly.

The A-ordningen can revise recent months. Each monthly data release is therefore archived as its own vintage and is not changed afterwards; the site always shows the latest release, and all earlier ones can be downloaded.