Labour Force Survey 2nd quarter 1987 - 3rd quarter 1988, panel file

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 ------------------------------------------------------------------------------------------------------------------ 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 ------------------------------------------------------------------------------------------------------------------ 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 66 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.

SSB自1972年第一季度起开展官方季度劳动力调查（Labor Force Survey，以下简称LFS）。本调查旨在为劳动主管部门及其他相关方提供人口职业结构及其随时间演变的相关信息，为职业预测与劳动力市场研究提供基础数据与统计资料。

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，此类统计数据本应作为基于保险基金参保档案的月度就业统计的补充分析工具。然而，1971年1月1日健康保险纳入国民保险计划后，基于保险基金的统计数据不再使用，LFS也逐渐演变为了解劳动力市场现状的核心信息来源。

劳动力调查通用信息：http://www.nsd.uib.no/data/ny_individ/norStudy/aku.html
LFS面板数据概览及面板文件详细说明：组别：1977|1978|1979|1980|1981|1982|1983|1984|1985|1986|1987|1988；季度：1234|1234|1234|1234|1234|1234|1234|1234|1234|1234|1234|1234|
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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

面板文件通过关联LFS常规访问轮次中的四次访问数据生成。在上表中，这意味着可将所有标记为X的组别（行）进行关联。第1组已被移除，因为该组的访问始于1971年第四季度。本次调查以参与四次访问作为筛选标准，因此未参与第四次访问的受访者均已被剔除。

1975年，SSB调整了筛选策略，因该策略调整而被排除的组别（即1973或1974年启动、本应在1975年进行至少一次访问的组别）均已被移除。以某一列为例，如1983年第一季度，可看到四分之一的受访者参与了第四次、第三次等访问。季度权重可使此类数据块（列）与全国统计数据保持平衡。若将4个组合并为年度文件，则需将权重除以4以得到合理的加权数据。

面板文件则采用横向关联的方式构建，每个面板包含四个权重，分别对应四个季度；尽管各权重间差异不大，但均为独立编制，且每个权重仅可用于对应季度生成的数据集。加权数据对应一个样本池，即约占季度总样本量的25%，因此需将其乘以4以得到近似的全国季度统计数据。所谓"近似全国季度统计数据"，是指由于面板数据关联过程涉及特定筛选规则，可能导致其与各季度单独得到的加权全国统计数据间存在细微差异。

本面板文件对应上表中的第66组。该文件后期基于1988年的文件说明编制，原始文件中的权重专为月度数据使用而设计。1988年第一季度与第二季度之间，LFS进行了重组，不仅出台了新的文件说明，还调整了劳动力市场地位的状态代码。当前面板文件恰好处于此次重组的节点，但仍基本遵循了重组前编制的文件说明。

这一做法存在实际考量：9个面板文件的最新访问时间跨度为1987年第一季度至1989年第一季度，这些文件由SSB统一编制并同步提交至NSD。但此类面板文件生成了两个版本：由于V009、V036与V073（劳动力市场地位指标）发生了调整，需对数据进行重新编码以确保1988年第一至第二季度调整前后的数据具有可比性。其中，NSD0603提供原始代码格式的数据，NSD0604提供重新编码后的数据，涵盖1987年与1988年的全部可比对代码。