Labour Force Survey 1st - 4th quarter 1975, panel file

This file contains the panel interviewed the last time the fourth quarter of 1975. Subjects were interviewed each quarter in 1975.

SSB has conducted official quarterly labor force surveys (LFS) as of Q1 1972. The purpose is to provide labor authorities and others information on the occupational structure of the population and development over time. The studies will provide the basis and statistical material for occupational forecasting and labor market research. In the LFS one respodent is interviewed for two consecutive quarters, so it is a two quarter break and then the respondent is interviewed again for two consecutive quarters. Labour Force Survey 1972 is the first complete LFS. Originally it was intended that such statistics would be a more analytical supplement to the monthly employment statistics were based on the insurance fund membership files. The insurance fund-based statistics, however, fell away when health insurance was included in the National Insurance Scheme from 1 January 1971, the LFS has gradually evolved to become the main source of knowledge about the state and development of the labor market.

In 1975 SSB changed the sampling procedure for the surveys, see HIf Art.37: On the use of random samples at the office for interview surveys, Statistics Norway (Steinar Tamsfoss), and SES 33: Principles and methods for Statistics Norway samples (Ib Thomsen). Meanwhile, the estimation method for inflating the national figures changed so that there are reasonable numbers for regions from 1975. The change in 1975 led to the interviews changing in groups than before and after. This resulted among others a break in the panel structure of the LFS. This file contains the panel interviewed the last time the fourth quarter of 1975. Subjects were interviewed each quarter 1975. The criteria for being included in the file that you attended in the last interview in sequence.

General information on the Labour Force Survey: http://www.nsd.uib.no/data/ny_individ/norStudy/aku.html

Overview of LFS panels with detailed explanation for panel files:
Data collection for the LFS was started somewhat experimental in 1971, but the data are first published from 1972. It may be useful to look at these detailed overview:

Group 1971 | 1972 | 1973 | 1974 | 1975 | 1976 | 1977 | 1978 | 1979 |
Quarter12345| 1234 | 1234 | 1234 | 1234 | 1234 | 1234 | 1234 | 1234 |
-4 00 0| 0 | | | |
-3 00 | 00 | | | |
-2 00 | 00 | | | |
-1 00| 00 | | | |
------------|--------|-------|--------|-------|-----------
1 0| 0 0 | 0 | | |
2 | XX | XX | | |
3 | XX | XX | | |
4 | XX | XX | | |
------------|--------|-------|--------|-------|--------------
5 | X | X X | X | |
6 | | XX | XX | |
7 | | XX | XX | |
8 | | XX | XX | |
9 | | 0 | 0 0 | |
10 | | | 00 | |
11 | | | 00 | |
12 | | | 00 | |
13 | | | 0 | |
14 | | | | 000 |
15 | | | | XXXX |
16 | | | | 0 0 | 0
17 | | | | XX | XX
18 | | | | XX | XX
19 | | | | XX | XX

Panel files are created by linking four interviews from an ordinary interview round in LFS. In the table above this means that one could connect all the groups (lines) marked X.
Group 1 is removed because the intweviews started 4th quarter 1971.
Participation 4 times is used as a selection criterion, therefore everyone that didn't participate in the 4th interview has been omitted.
In 1975 SSB changed selection strategy. The groups that were left out due to this (started in 1973 or 1974, should've had one or more interviews in 1975) are removed.