Labour Force Survey 1st quarter 2017 - 4th quarter 2018, panel

Labour Force Survey 1st quarter 2017 - 4th quarter 2018, panel

As of the 1st quarter of 1972, SSB has conducted official quarterly labour force surveys (AKU). These surveys aim to give the labour force authorities (and other people interested) knowledge of the occupational structure of the population and how it develops over time. The surveys are meant to give a foundation and statistical material for occupational prognoses and labour research.

In 1996, AKU was significantly revised: The questionnaire, the file description and the standard for coding of industry and occupation. The data collection also changed to CATI - Computer Assisted Telephone Interviewing. A new classification of industry was put into use (NOS C 182, based on the EU standard NACE, Rev.1). This standard was updated in 2002 and 2007. Also, the new Norwegian standard classification of occupations (STYRK) based on ISCO 88 was used from 1996 and onwards. The variable indicating socio-economic status was omitted, as a similar variable was not developed in the new occupational classification.

Every second quarter AKU is extended with a number of questions to collect data accordant to Eurostats / EUs spesifications.

From 1996, the rotation schedule changed, each family now attends eight consecutive quarters. As of 1996 the selection shedule was changed as well with stratification at the county level.

Summary of AKU panels with detailed explanations for panel files:
Data collection for the new rotation plan as the basis for this file is shown below. Participants in the 4th quarter of 1997 is the first batch of 8 possible completed interviews.

Pool |2014|2015|2016|2017|2018|2019|2020|2021|
Quarter|1234|1234|1234|1234|1234|1234|1234|1234|
---------------------------------------------------------------------------------------------
|____|____|__XX|XXXX|____|____|____|____| 2017, 1
|____|____|___X|XXXX|X___|____|____|____| 2017, 2
|____|____|____|XXXX|XX__|____|____|____| 2017, 3
|____|____|____|_XXX|XXX_|____|____|____| 2017, 4
---------------------------------------------------------------------------------------------
|____|____|____|__XX|XXXX|____|____|____| 2018, 1
|____|____|____|___X|XXXX|X___|____|____| 2018, 2
|____|____|____|____|XXXX|XX__|____|____| 2018, 3
|____|____|____|____|_XXX|XXX_|____|____| 2018, 4

Panel files are created by linking eight interviews from an ordinary interview round of the Labour Force Survey. In the table above means that one could connect all the batches (lines) marked X.
Participation 8 times used as a criterion for selection.

Annual files and quarterly files consist of respondents who are participating for 1st time, 2nd time, and so on. The weights allow such cross-sections (columns) can be balanced with national figures. If 4 quarters is merged into an annual volume, the quarterly weights be divided by four to attain correct weighted annual numbers.

Each panel (panel files: horisontal in the table) will have a weight compiled for each quarter. Although the weights do not differ much from each other, they will be compiled independently, and each weight should be used only for the data which the quarterly weight is made for. Weighted numbers is valid for one pool, which means ca 12,5 % (1/8) of a total quarterly selection. Therefore, one must multiply by 8 to approximate national quarterly figures

By "Approximate national quarterly figures" it means that differences from the quarterly national weighted figures can appear, because of the selections and whitdrawal in the connection of the panels. Because of the whitdrawal inflated numbers will be lower than the national total figures. The main point of the weights is not to is not to give national totals, but rather to ensure the best possible representation.

2017年第一季度至2018年第四季度劳动力调查面板数据集

自1972年第一季度起，挪威统计局（Statistics Norway, SSB）便开展官方季度劳动力调查（Arbeidskraftundersøkelsen, AKU，以下简称AKU调查）。此类调查旨在为劳动力管理部门及其他相关关注者提供人口职业结构及其随时间演变的相关信息，并为职业预测与劳动研究提供基础数据与统计素材。

1996年，AKU调查迎来重大修订，涉及调查问卷、数据集说明以及行业与职业编码标准。数据采集方式也变更为计算机辅助电话访谈（Computer Assisted Telephone Interviewing, CATI）。本次修订启用了基于欧盟标准NACE Rev.1的行业分类标准NOS C 182，该标准分别于2002年与2007年完成更新。同时，1996年起开始采用基于国际标准职业分类1988版（International Standard Classification of Occupations 1988, ISCO-88）的新版挪威职业分类标准STYRK。由于新版职业分类体系未开发对应的社会经济地位变量，原体系中的社会经济地位标识变量被移除。

1996年起，每第二季度的AKU调查会新增若干问题，以采集符合欧盟统计局（Eurostat）及欧盟相关规范的数据。

1996年起，调查轮换机制调整：每个受访家庭需连续参与8个季度的调查。同年，抽样方案也进行了调整，采用县级分层抽样。

AKU面板数据集汇总说明（附面板文件详细解释）：本数据集基于新版轮换机制下的数据采集流程构建，1997年第四季度的受访对象为首批可完成8次访谈的样本组。

样本池 |2014|2015|2016|2017|2018|2019|2020|2021|
季度 |1234|1234|1234|1234|1234|1234|1234|1234|
-------------------------------------------------------------------------------------
|____|____|__XX|XXXX|____|____|____|____| 2017年第1季度
|____|____|___X|XXXX|X___|____|____|____| 2017年第2季度
|____|____|____|XXXX|XX__|____|____|____| 2017年第3季度
|____|____|____|_XXX|XXX_|____|____|____| 2017年第4季度
-------------------------------------------------------------------------------------
|____|____|____|__XX|XXXX|____|____|____| 2018年第1季度
|____|____|____|___X|XXXX|X___|____|____| 2018年第2季度
|____|____|____|____|XXXX|XX__|____|____| 2018年第3季度
|____|____|____|____|_XXX|XXX_|____|____| 2018年第4季度

面板数据集通过将劳动力调查常规访谈轮次中的8次访谈记录进行关联整合而成。上表中标记为X的行即可构成完整的样本组，受访对象需完成8次访谈方可入选样本。

年度数据集与季度数据集分别包含首次、第二次及后续各次参与调查的受访对象。抽样权重可确保此类截面数据（即表格列）与全国总体数据保持平衡。若将4个季度的数据合并为年度数据集，则需将季度权重除以4，以得到准确的加权年度统计值。

每个面板数据集（即表格中的横向行）均会为每个季度生成专属权重。尽管各季度权重差异不大，但权重均为独立计算所得，且仅可用于对应季度生成的数据集。加权统计值仅适用于单个样本池，约占季度总抽样样本的12.5%（即1/8）。因此，需将加权统计值乘以8以近似得到全国季度总体数据。

此处提及的“近似全国季度总体数据”，指由于面板数据关联过程中的抽样与退出情况，加权统计值可能与全国季度加权总体数据存在偏差。因受访对象退出导致的样本损耗，会使加权统计值低于全国总体数值。权重设置的核心目的并非生成全国总体统计值，而是尽可能确保样本的代表性。