Labour Force Survey 4th quarter 1986 - 1st quarter 1988, panel file, recoded

SSB has conducted official quarterly labor force surveys (LFS) from Q1 1972. The survey aims to provide labor authorities and others knowledge about the occupational structure of population and development over time. The surveys provide the basis and statistical material for occupational forecasting and labor market research. In the LFS respondents are interviewed two consecutive quarters, then after two more quarters they are interviewed again in two consecutive quarters. Labour Force Survey 1972 is the first complete LFS year long survey. Originally it was intended that such statistics would be a more analytical supplement to the monthly employment statistics 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 of the labor market.

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:

Group 1977|1978|1979|1980|1981|1982|1983|1984|1985|1986|1987|1988|
Quarter 1234|1234|1234|1234|1234|1234|1234|1234|1234|1234|1234|1234|
---------------------------------------------------------------------------------------------------------------
56 |____|____|____|____|____|____|____|___X|X__X|X___|____|____| 600_1 = 1986,1
57 |____|____|____|____|____|____|____|____|XX__|XX__|____|____| 600_2 = 1986,2
58 |____|____|____|____|____|____|____|____|_XX_|_XX_|____|____| 600_3 = 1986,3
59 |____|____|____|____|____|____|____|____|__XX|__XX|____|____| 600_4 = 1986,4
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60 |____|____|____|____|____|____|____|____|___X|X__X|X___|____| 601_1 = 1987,1
61 |____|____|____|____|____|____|____|____|____|XX__|XX__|____| 601_2 = 1987,2
62 |____|____|____|____|____|____|____|____|____|_XX_|_XX_|____| 601_3 = 1987,3
63 |____|____|____|____|____|____|____|____|____|__XX|__XX|____| 601_4 = 1987,4
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64 |____|____|____|____|____|____|____|____|____|___X|X__X|X___| 603_1 = 1988,1
65 |____|____|____|____|____|____|____|____|____|____|XX__|XX__| 603_2 = 1988,2
66 |____|____|____|____|____|____|____|____|____|____|_XX_|_XX_| 603_3 = 1988,3
67 |____|____|____|____|____|____|____|____|____|____|__XX|__XX| 603_4 = 1988,4

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.

Looking at a particular column, for example. Q1 1983, we will see that 1/4 of respondents are included for the 4th time, the 3rd time etc. The total sum of the material for one quarter. Quarterly weights allows one such block (column) to be balanced with national figures. If taking 4 groups and turning them into a year file the weights must be divided by 4 to give proper weighted figures.

Panel files goes in the other direction (horizontally) and each panel will have four weights, one for each quarter, and although they do not differ much will they be prepared independently and each weight should be used only for data from the quarterly weight is made. Weighted figures are for a pool, ie ca. 25% of the total quarterly sample and must therefore multiply by 4 to get approximately the national quarterly.

With "almost national quarterly" means that since panel connectors innebærerer a certain selection, as it may cause minor differences from the weighted national figures one gets for each quarter

This panel file covers group 64 in the table above. The file itself is created later, based on a file description from 1988; the weights in the original file is created to be used on months.

Between the 1st and 2nd quarter of 1988 there was a reorganization of the LFS including resulted in a new file description, and that the status codes for status in the labor market changed. The present panel file is located exactly at the forefront of this change, but still follows essentially the file description that was prepared for the change. This has practical reasons, the 9 panel files have the latest interview from Q1 1987 to Q1 1989 was compiled together and transmitted simultaneously from SSB to NSD. However, it created two versions of these panel files: Because the V009, V036 and V073 (status on the labor market) is changed, the data also recoded to obtain comparable data before and after the adjustments between the 1st and 2nd quarter 1988
NSD0603 provides data with original codes, NSD0604 provide encoded data, the entire 1987 and 1988 codes that are comparable with subsequent encoding.

挪威统计局（SSB）自1972年第一季度起开展官方季度劳动力调查（Labour Force Survey, 以下简称LFS），该调查旨在为劳动主管部门及其他机构提供人口职业结构及其随时间演变的相关信息。此类调查为职业预测与劳动力市场研究提供了基础依据与统计素材。在LFS中，受访者需接受连续两个季度的访问，间隔两个季度后，再次接受连续两个季度的访问。1972年劳动力调查是首个完整的年度LFS调查。最初，此类统计被设计为基于保险基金会员档案的月度就业统计的分析补充，但1971年1月健康保险被纳入国民保险计划后，基于保险基金的统计方式被废止，LFS也逐步演变为了解劳动力市场状况的核心信息来源。

劳动力调查通用信息：http://www.nsd.uib.no/data/ny_individ/norStudy/aku.html

LFS面板概览及面板文件详细说明：
Group 1977|1978|1979|1980|1981|1982|1983|1984|1985|1986|1987|1988|
Quarter 1234|1234|1234|1234|1234|1234|1234|1234|1234|1234|1234|1234|
---------------------------------------------------------------------------------------------------------------
56 |____|____|____|____|____|____|____|___X|X__X|X___|____|____| 600_1 = 1986,1
57 |____|____|____|____|____|____|____|____|XX__|XX__|____|____| 600_2 = 1986,2
58 |____|____|____|____|____|____|____|____|_XX_|_XX_|____|____| 600_3 = 1986,3
59 |____|____|____|____|____|____|____|____|__XX|__XX|____|____| 600_4 = 1986,4
------------------------------------------------------------------------------------------------------------------
60 |____|____|____|____|____|____|____|____|___X|X__X|X___|____|____| 601_1 = 1987,1
61 |____|____|____|____|____|____|____|____|____|XX__|XX__|____|____| 601_2 = 1987,2
62 |____|____|____|____|____|____|____|____|____|_XX_|_XX_|____|____| 601_3 = 1987,3
63 |____|____|____|____|____|____|____|____|____|__XX|__XX|____|____| 601_4 = 1987,4
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64 |____|____|____|____|____|____|____|____|____|___X|X__X|X___|____|____| 603_1 = 1988,1
65 |____|____|____|____|____|____|____|____|____|____|XX__|XX__|____|____| 603_2 = 1988,2
66 |____|____|____|____|____|____|____|____|____|____|_XX_|_XX_|____|____| 603_3 = 1988,3
67 |____|____|____|____|____|____|____|____|____|____|__XX|__XX|____|____| 603_4 = 1988,4

注：上述表格中，600_1对应1986年第1季度，600_2对应1986年第2季度，以此类推。

面板文件通过关联LFS常规访谈轮次中的四次访谈数据生成。上表中，可通过所有标记为X的组别（行）完成数据关联。第1组因访谈始于1971年第四季度而被剔除。本次筛选以完成四次访谈为标准，未参与第四次访谈的所有受访者均被排除。1975年SSB调整了筛选策略，因该调整被排除的组别（始于1973或1974年，本应在1975年开展一次或多次访谈）均被移除。

以某一特定列为例，如1983年第一季度，可看到1/4的受访者分别为第四次受访、第三次受访等。单季度数据集的总样本量方面，季度权重可使此类区块（列）与全国统计数据保持平衡。若将4个组整合为年度数据集，则需将权重除以4以获得合理的加权统计值。

面板文件的处理方向为横向（即按列维度），每个面板包含四个权重，分别对应四个季度；尽管各权重差异不大，但仍需独立编制，且每个权重仅可用于对应季度生成的数据集。加权统计值对应一个样本池，即约占季度总样本的25%，因此需将其乘以4以近似得到全国季度统计值。

此处“近似全国季度统计值”意指，由于面板关联流程存在特定筛选规则，可能导致与单季度加权全国统计数据存在小幅差异。

本面板文件对应上表中的第64组。该文件后续编制完成，基于1988年的文件说明；原始文件中的权重用于月度数据集。

1988年第一季度与第二季度之间，LFS进行了重组，此次重组带来了新的文件说明，并更新了劳动力市场状况的状态编码。本面板文件正处于此次变更的前沿，但仍基本遵循变更前编制的文件说明。此举出于实际考量：9个面板文件（最新访谈时间覆盖1987年第一季度至1989年第一季度）由SSB统一编制并同步提交至NSD。然而，此类面板文件生成了两个版本：由于V009、V036与V073（劳动力市场状况编码）发生变更，需对数据进行重新编码，以确保1988年第一、二季度调整前后的数据具有可比性。

NSD0603提供原始编码数据，NSD0604提供经重新编码后、可与1987年及1988年后续编码保持一致的可比数据。