Construction Contractors Survey 2001 - West Bank and Gaza

Abstract
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The objective of the survey was to obtain data on:
1. Number of enterprises and persons engaged in construction contractors survey by activity.
2. Value of output, intermediate consumption and stocks.
3. Value added components.
4. Payments and transfers.
5. Assets and capital formation.
6. Contribution of the surveyed activities to the GDP and other national accounts variables.

Geographic coverage
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West Bank and Gaza Strip

Analysis unit
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Enterprise constitutes the primary sampling unit (PSU)

Universe
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construction contractors Enterprises (private sector)

Kind of data
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Sample survey data [ssd]

Sampling procedure
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Comprehensive Survey

Mode of data collection
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Face-to-face [f2f]

Research instrument
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The questionnaire used for this survey has much in common with other questionnaires in the
economic survey series. The design of the questionnaire takes into account major economic
variables pertaining to the examined phenomenon and meets the needs of the Palestinian
National Accounts. Two forms of questionnaires are used a shorter version of the
questionnaire used for the enterprises belonging to the household sector and branches, the
detailed form used for other sectors.

Cleaning operations
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For insuring quality and consistency of data a set of measures were taken into account for strengthening accuracy of data as follows:
·Preparing data entry program before data collection for checking readiness of the program for data entry.
·A set of validation rules were applied on the program for checking consistency of data.
·Efficiency of the program was checked through pre-testing in entering few questionnaires, including incorrect information for checking its efficiency, in capturing these information.
·Well trained data keyers were selected and trained for the main data entry.
·Weekly or biweekly data files were received by project management for checking accuracy and consistency, notes of correction are provided for data entry management for correction.

Response rate
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·Response rate: 80.5%

Sampling error estimates
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Statistical Errors:
There is no statistical errors (Comprehensive Survey)

Non-Statistical Errors
These types of errors could appear on one or all the survey stages that include data collection and data entry: Response errors: these types of errors are related to, responders, fieldworkers, and data entry personnel's. And to avoid mistakes and reduce the impact has been a series of actions that would enhance the accuracy of the data through a process of data collection from the field and the data processing.

摘要
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本调查的目的是获取以下方面的数据：
1. 按活动分类的建筑承包商企业和人员的数量。
2. 产出价值、中间消费和库存的价值。
3. 增加值的组成部分。
4. 支付和转移。
5. 资产和资本形成。
6. 被调查活动对国内生产总值及其他国民经济变量的贡献。
地理覆盖范围
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西岸和加沙地带
分析单位
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企业构成主要抽样单位（PSU）
总体
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建筑承包商企业（私营部门）
数据类型
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样本调查数据 [ssd]
抽样程序
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全面调查
数据收集方式
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面对面 [f2f]
研究工具
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本次调查所使用的问卷与其他经济调查系列中的问卷有许多相似之处。问卷的设计考虑了与考察现象相关的重大经济变量，并满足了巴勒斯坦国家核算的需求。问卷有两种形式：一种为适用于家庭部门和分支机构的简短版问卷，另一种为适用于其他部门的详细版问卷。
数据清洗操作
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为确保数据的质量和一致性，采取了一系列措施以加强数据的准确性，具体如下：
· 在数据收集前准备数据录入程序，以检查程序的数据录入准备情况。
· 在程序中应用一组验证规则，以检查数据的一致性。
· 通过预先测试少量包含错误信息的问卷，包括检查其效率的信息捕获，来检查程序的有效性。
· 选择并培训了经过良好训练的数据录入员进行主要数据录入。
· 项目管理每周或每两周接收数据文件，以检查准确性和一致性，并为数据录入管理提供更正的笔记。
响应率
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· 响应率：80.5%
抽样误差估计
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统计误差：
在全面调查中不存在统计误差。
非统计误差
这些类型的误差可能出现在调查的任何一个或所有阶段，包括数据收集和数据录入：响应误差：这类误差与受访者、现场工作人员和数据录入人员有关。为了避免错误并减少影响，采取了一系列措施，通过从现场收集数据和数据处理的过程来提高数据的准确性。