Construction Contractors Survey 2008 - West Bank and Gaza

Abstract
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he 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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All enterprises in construction contractors survey (comprehensive)

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 design of the 2008 questionnaire takes into account the major economic variables pertaining to the examined phenomenon, and the needs of compiling the National Accounts for Palestine.
Due to the political conditions in Gaza Strip , there was a very brief model of the questionnaire, in order to collect basic data required for national accounts and without any details.

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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Number of enterprises(Sample) 565
·Non-response cases was 81.
·Over coverage cases was 50.
·Net sample: 565-50= 515.
·Response rate: 84.3%.
·Non-response rate: 15.7%.

Sampling error estimates
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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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本调查的目的是收集以下数据：
1. 按活动划分的建筑承包商参与企业和人员的数量。
2. 产出价值、中间消费和库存的价值。
3. 价值增加的组成部分。
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家账户变量的贡献。
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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建筑承包商调查中的所有企业（全面调查）
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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2008年问卷的设计充分考虑了与所考察现象相关的重大经济变量，以及编制巴勒斯坦国家账户的需求。鉴于加沙地带的政治状况，问卷的模型非常简略，以便收集编制国家账户所需的基本数据，而不涉及任何细节。
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增强数据的准确性，如下所示：
· 在数据收集前准备数据输入程序，以检查程序的数据输入准备情况。
· 在程序上应用一组验证规则，以检查数据的一致性。
· 通过预测试输入少量问卷（包括包含错误信息以检查其效率）来检查程序的有效性。
· 选择并培训了熟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，以检查数据的准确性和一致性，并为数据录入管理提供更正的备注。
响应率
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企业数量（样本） 565
· 非响应案例 81。
· 过度覆盖案例 50。
· 净样本：565-50= 515。
· 响应率：84.3%。
· 非响应率：15.7%。
抽样误差估计
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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：这些类型的误差与受访者、现场工作人员和数据录入人员相关。为了避免错误并减少影响，采取了一系列行动，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。