The Best Management Practices Statistical Estimator (BMPSE) version 1.2.0 was developed by the U.S. Geological Survey (USGS), in cooperation with the Federal Highway Administration (FHWA) Office of Project Delivery and Environmental Review to provide planning-level information about the performance of structural best management practices for decision makers, planners, and highway engineers to assess and mitigate possible adverse effects of highway and urban runoff on the Nation's receiving waters (Granato 2013, 2014; Granato and others, 2021). The BMPSE was assembled by using a Microsoft Access® database application to facilitate calculation of BMP performance statistics. Granato (2014) developed quantitative methods to estimate values of the trapezoidal-distribution statistics, correlation coefficients, and the minimum irreducible concentration (MIC) from available data. Granato (2014) developed the BMPSE to hold and process data from the International Stormwater Best Management Practices Database (BMPDB, www.bmpdatabase.org). Version 1.0 of the BMPSE contained a subset of the data from the 2012 version of the BMPDB; the current version of the BMPSE (1.2.0) contains a subset of the data from the December 2019 version of the BMPDB. Selected data from the BMPDB were screened for import into the BMPSE in consultation with Jane Clary, the data manager for the BMPDB. Modifications included identifying water quality constituents, making measurement units consistent, identifying paired inflow and outflow values, and converting BMPDB water quality values set as half the detection limit back to the detection limit. Total polycyclic aromatic hydrocarbons (PAH) values were added to the BMPSE from BMPDB data; they were calculated from individual PAH measurements at sites with enough data to calculate totals. The BMPSE tool can sort and rank the data, calculate plotting positions, calculate initial estimates, and calculate potential correlations to facilitate the distribution-fitting process (Granato, 2014). For water-quality ratio analysis the BMPSE generates the input files and the list of filenames for each constituent within the Graphical User Interface (GUI). The BMPSE calculates the Spearman’s rho (ρ) and Kendall’s tau (τ) correlation coefficients with their respective 95-percent confidence limits and the probability that each correlation coefficient value is not significantly different from zero by using standard methods (Granato, 2014). If the 95-percent confidence limit values are of the same sign, then the correlation coefficient is statistically different from zero. For hydrograph extension, the BMPSE calculates ρ and τ between the inflow volume and the hydrograph-extension values (Granato, 2014). For volume reduction, the BMPSE calculates ρ and τ between the inflow volume and the ratio of outflow to inflow volumes (Granato, 2014). For water-quality treatment, the BMPSE calculates ρ and τ between the inflow concentrations and the ratio of outflow to inflow concentrations (Granato, 2014; 2020). The BMPSE also calculates ρ between the inflow and the outflow concentrations when a water-quality treatment analysis is done. The current version (1.2.0) of the BMPSE also has the option to calculate urban-runoff quality statistics from inflows to BMPs by using computer code developed for the Highway Runoff Database (Granato and Cazenas, 2009;Granato, 2019). Granato, G.E., 2013, Stochastic empirical loading and dilution model (SELDM) version 1.0.0: U.S. Geological Survey Techniques and Methods, book 4, chap. C3, 112 p., CD-ROM https://pubs.usgs.gov/tm/04/c03 Granato, G.E., 2014, Statistics for stochastic modeling of volume reduction, hydrograph extension, and water-quality treatment by structural stormwater runoff best management practices (BMPs): U.S. Geological Survey Scientific Investigations Report 2014–5037, 37 p., http://dx.doi.org/10.3133/sir20145037. Granato, G.E., 2019, Highway-Runoff Database (HRDB) Version 1.1.0: U.S. Geological Survey data release, https://doi.org/10.5066/P94VL32J. Granato, G.E., and Cazenas, P.A., 2009, Highway-Runoff Database (HRDB Version 1.0)--A data warehouse and preprocessor for the stochastic empirical loading and dilution model: Washington, D.C., U.S. Department of Transportation, Federal Highway Administration, FHWA-HEP-09-004, 57 p. https://pubs.usgs.gov/sir/2009/5269/disc_content_100a_web/FHWA-HEP-09-004.pdf Granato, G.E., Spaetzel, A.B., and Medalie, L., 2021, Statistical methods for simulating structural stormwater runoff best management practices (BMPs) with the stochastic empirical loading and dilution model (SELDM): U.S. Geological Survey Scientific Investigations Report 2020–5136, 41 p., https://doi.org/10.3133/sir20205136

The Clinical Data Management & Statistical Analysis market is booming, projected to reach $15 billion in 2025 with an 8% CAGR through 2033. Learn about key drivers, trends, and challenges shaping this dynamic industry, including leading companies and regional market share. Explore the impact of AI and EDC systems on clinical trial efficiency.

The global clinical data management and statistical analysis market is projected to reach USD 32.4 billion by 2033, expanding at a CAGR of 10.1%. Increasing clinical trial outsourcing, rising adoption of electronic data capture (EDC) systems, and growing healthcare expenditure drive market growth. The market is segmented into data management and statistical analysis, with the former accounting for a larger share. Key players in the market include Clinipace, Charles River Laboratories, LabCorp, ICON PLC, and Parexel. North America is the largest market for clinical data management and statistical analysis, followed by Europe and Asia Pacific. The region's large population base, presence of major pharmaceutical companies, and extensive adoption of advanced technologies contribute to its dominance. The Asia Pacific region is expected to experience the fastest growth due to increasing investments in healthcare infrastructure, government initiatives to promote clinical research, and rising demand for clinical data outsourcing services.

As of June 2024, the most popular database management system (DBMS) worldwide was Oracle, with a ranking score of *******; MySQL and Microsoft SQL server rounded out the top three. Although the database management industry contains some of the largest companies in the tech industry, such as Microsoft, Oracle and IBM, a number of free and open-source DBMSs such as PostgreSQL and MariaDB remain competitive. Database Management Systems As the name implies, DBMSs provide a platform through which developers can organize, update, and control large databases. Given the business world’s growing focus on big data and data analytics, knowledge of SQL programming languages has become an important asset for software developers around the world, and database management skills are seen as highly desirable. In addition to providing developers with the tools needed to operate databases, DBMS are also integral to the way that consumers access information through applications, which further illustrates the importance of the software.

[226+ Pages Report] The global curriculum and data management market size is expected to grow from USD 8.93 billion in 2023 to USD 26.42 billion by 2032, at a CAGR of 12.8% from 2024-2032

The research data utilized in this study primarily consists of responses from a survey administered to information security and risk management professionals globally. The survey was designed to elicit the relative importance of various criteria when selecting a Third-Party Risk Management (TPRM) tool. The survey employed a weighted scale, allowing respondents to assign a level of importance (e.g., not important, somewhat important, very important) to each of the criteria identified in the applied framework.

The survey sample encompassed a diverse range of roles and levels of seniority within organizations, including CEOs, VPs, auditors, and managers. This diversity aimed to capture a comprehensive view of the priorities and preferences across the industry.

The collected survey data was then analyzed using descriptive statistics and a weighted average approach to determine the mean and median scores for each evaluation criterion. This analysis allowed for a quantitative assessment of the relative importance of different features and functionalities in TPRM tools, providing valuable insights into the decision-making process of industry professionals.

Additionally, the study incorporated a review of existing literature on TPRM and tool selection. This literature review served to identify key concepts, trends, and gaps in knowledge, informing the development of the TPRMTSF framework and the selection of survey criteria.

The combination of survey data and literature review provides a comprehensive foundation for the research findings and recommendations presented in this study. By analyzing both empirical data and existing knowledge, the study offers a well-rounded perspective on the challenges and opportunities associated with TPRM tool selection.

Collected Raw & Post-processed data from DC-TRNG for both AIS-31 and NIST800-90B tests suites for Final Report on Data Management The purpose of the final report on data management is to provide an update of the analysis of the main elements of the data management policy used by the applications with regards to all the datasets that were generated by the project. Most important aspects regarding data management, like metadata generation, data preservation, and responsibilities, were updated compared to the initial report D5.2 (Data Management Plan) according to the outcome of the project.

[211+ Pages Report] The global Enterprise Data Management market size is expected to grow from USD 77.5 billion to USD 130.6 billion by 2028, at a CAGR of 9.1% from 2022-2028

The NATCOOP project set out to study how nature shapes the preferences and incentives of economic agents and how this in turn affects common-pool resource management. Imagine a group of fishermen targeting a species that requires a lot of teamwork to harvest. Do these fishers become more social over time compared to fishers that work in a more solitary manner? If so, does this have implications for how the fishery should be managed? To study this, the NATCOOP team travelled to Chile and Tanzania and collected data using surveys and economic experiments. These two very different countries have a large population of small-scale fishermen, and both host several distinct types of fisheries. Over the course of five field trips, the project team surveyed more than 2500 fishermen with each field trip contributing to the main research question by measuring fishermen’s preferences for cooperation and risk. Additionally, each fieldtrip aimed to answer another smaller research question that was either focused on risk taking or cooperation behavior in the fisheries. The data from both surveys and experiments are now publicly available and can be freely studied by other researchers, resource managers, or interested citizens. Overall, the NATCOOP dataset contains participants’ responses to a plethora of survey questions and their actions during incentivized economic experiments. It is available in both the .dta and .csv format, and its use is recommended with statistical software such as R or Stata. For those unaccustomed with statistical analysis, we included a video tutorial on how to use the data set in the open-source program R.

Statistical Analysis Software Market Outlook

The global market size for statistical analysis software was estimated at USD 11.3 billion in 2023 and is projected to reach USD 21.6 billion by 2032, growing at a compound annual growth rate (CAGR) of 7.5% during the forecast period. This substantial growth can be attributed to the increasing complexity of data in various industries and the rising need for advanced analytical tools to derive actionable insights.

One of the primary growth factors for this market is the increasing demand for data-driven decision-making across various sectors. Organizations are increasingly recognizing the value of data analytics in enhancing operational efficiency, reducing costs, and identifying new business opportunities. The proliferation of big data and the advent of technologies such as artificial intelligence and machine learning are further fueling the demand for sophisticated statistical analysis software. Additionally, the growing adoption of cloud computing has significantly reduced the cost and complexity of deploying advanced analytics solutions, making them more accessible to organizations of all sizes.

Another critical driver for the market is the increasing emphasis on regulatory compliance and risk management. Industries such as finance, healthcare, and manufacturing are subject to stringent regulatory requirements, necessitating the use of advanced analytics tools to ensure compliance and mitigate risks. For instance, in the healthcare sector, statistical analysis software is used for clinical trials, patient data management, and predictive analytics to enhance patient outcomes and ensure regulatory compliance. Similarly, in the financial sector, these tools are used for fraud detection, credit scoring, and risk assessment, thereby driving the demand for statistical analysis software.

The rising trend of digital transformation across industries is also contributing to market growth. As organizations increasingly adopt digital technologies, the volume of data generated is growing exponentially. This data, when analyzed effectively, can provide valuable insights into customer behavior, market trends, and operational efficiencies. Consequently, there is a growing need for advanced statistical analysis software to analyze this data and derive actionable insights. Furthermore, the increasing integration of statistical analysis tools with other business intelligence and data visualization tools is enhancing their capabilities and driving their adoption across various sectors.

From a regional perspective, North America currently holds the largest market share, driven by the presence of major technology companies and a high level of adoption of advanced analytics solutions. However, the Asia Pacific region is expected to witness the highest growth rate during the forecast period, owing to the increasing adoption of digital technologies and the growing emphasis on data-driven decision-making in countries such as China and India. The region's rapidly expanding IT infrastructure and increasing investments in advanced analytics solutions are further contributing to this growth.

Component Analysis

The statistical analysis software market can be segmented by component into software and services. The software segment encompasses the core statistical analysis tools and platforms used by organizations to analyze data and derive insights. This segment is expected to hold the largest market share, driven by the increasing adoption of data analytics solutions across various industries. The availability of a wide range of software solutions, from basic statistical tools to advanced analytics platforms, is catering to the diverse needs of organizations, further driving the growth of this segment.

The services segment includes consulting, implementation, training, and support services provided by vendors to help organizations effectively deploy and utilize statistical analysis software. This segment is expected to witness significant growth during the forecast period, driven by the increasing complexity of data analytics projects and the need for specialized expertise. As organizations seek to maximize the value of their data analytics investments, the demand for professional services to support the implementation and optimization of statistical analysis solutions is growing. Furthermore, the increasing trend of outsourcing data analytics functions to third-party service providers is contributing to the growth of the services segment.

Within the software segment, the market can be further categori

Objectives: Demonstrate the application of decision trees—classification and regression trees (CARTs), and their cousins, boosted regression trees (BRTs)—to understand structure in missing data. Setting: Data taken from employees at 3 different industrial sites in Australia. Participants: 7915 observations were included. Materials and methods: The approach was evaluated using an occupational health data set comprising results of questionnaires, medical tests and environmental monitoring. Statistical methods included standard statistical tests and the ‘rpart’ and ‘gbm’ packages for CART and BRT analyses, respectively, from the statistical software ‘R’. A simulation study was conducted to explore the capability of decision tree models in describing data with missingness artificially introduced. Results: CART and BRT models were effective in highlighting a missingness structure in the data, related to the type of data (medical or environmental), the site in which it was collected, the numb...

Executive Summary Background In June 2016, the Tri-Council Agencies released a statement regarding Digital Data Management for grant applications . In preparation to support researchers facing new requirements, UBC librarians on both the Vancouver and Okanagan campuses initially surveyed faculty in the Sciences in Fall 2015, to determine both the actual practices of Research Data Management (RDM) employed by these researchers, and areas where the researchers would like help. Acknowledging disciplinary differences, a second survey was administered to all faculty and graduate students in Humanities and Social Sciences in October 2016. The results of these surveys will assist the University in making evidence-based decisions about what expertise will be needed to support and assist faculty in improving their data management practises to meet new requirements from funding bodies. Findings Researchers are collecting and working with a wide variety of data ranging from numerical and text data to multimedia files, software, instrument specific data, geospatial data, and many other types of data. Researchers identified four broad areas where they would like additional help and support: 1. Data Storage (including preservation and sharing) 2. Data Management Plans 3. Data Repository access 4. Data Education (workshops, and personalized training) These areas present opportunities for the Library and campus partners to bolster research excellence by supporting strong RDM practices of Faculty, Students and Staff. Recommendations 1. The Library continues to collaborate with VPR’s Advanced Research Computing (ARC) unit, UBC Ethics, UBC IT Services, and other campus partners to plan and coordinate services for researchers around the management of research data. 2. UBC ensures that a robust infrastructure is available to researchers to store, preserve, and share their research data. 3. UBC implements a campus-wide service to support a Data Management Repository (or suite of repositories) which would include the Abacus Dataverse (currently operated by the Library). Conclusions A more detailed statistical analysis is underway, but initial results show that the majority of survey respondents indicated that they need assistance with storage and security of research data, with crafting data management plans, with a centralized research data repository, and with workshops about research data best practices for faculty and especially for graduate students. Further, understandings of the particular needs or habits within specific research disciplines will provide insights into how these researchers think about, and work with data and can also identify areas for future research and investigation. Finally, this survey has provided a fuller understanding of the RDM needs and perceived barriers and benefits which can now enable more targeted and nuanced conversations between librarians, researchers, and IT research support personnel. These results will assist the Library and other campus partners with the development of specific programs and infrastructure to bolster a strategic direction for RDM support.

List of Top Authors of International Conference on Scientific and Statistical Database Management: [proceedings] International Conference on Scientific and Statistical Database Management sorted by citations.

The Clinical Data Management (CDM) and Statistical Analysis market is pivotal in the evolving landscape of the healthcare and pharmaceutical industries, where it serves as a foundation for making informed clinical decisions and regulatory submissions. With the growing emphasis on data-driven strategies, the market i

*** Please, find the file "Methodological_EOAQ_Tutorial.pdf" for instructions *** This dataset and accompanying R scripts support the manuscript titled "Systematic Methodology for Psychometric Model Selection applied to the European Obesity Academy Questionnaire". The manuscript is a methodological paper that discusses key concepts and includes a detailed tutorial offering a step-by-step approach to construct validation through a systematic methodology for psychometric model selection, using the European Obesity Academy Questionnaire: Expectations of Surgical Treatment (EOAQ-EST) as a case study. The EOAQ-EST assesses the expectations and motivations of candidates for bariatric surgery. The tutorial explains the process of selecting the best candidate models from 79 possibilities, utilizing data from 137 obese female patients. We employ multigroup confirmatory factor analysis to validate the construct, ensuring the reliability and applicability of the psychometric models. This resource aims to be valuable for researchers seeking to employ advanced psychological methods in their work.

Source data covering changepoints in UAG and offtake nodes

Spatial analysis and statistical summaries of the Protected Areas Database of the United States (PAD-US) provide land managers and decision makers with a general assessment of management intent for biodiversity protection, natural resource management, and recreation access across the nation. The PAD-US 3.0 Combined Fee, Designation, Easement feature class (with Military Lands and Tribal Areas from the Proclamation and Other Planning Boundaries feature class) was modified to remove overlaps, avoiding overestimation in protected area statistics and to support user needs. A Python scripted process ("PADUS3_0_CreateVectorAnalysisFileScript.zip") associated with this data release prioritized overlapping designations (e.g. Wilderness within a National Forest) based upon their relative biodiversity conservation status (e.g. GAP Status Code 1 over 2), public access values (in the order of Closed, Restricted, Open, Unknown), and geodatabase load order (records are deliberately organized in the PAD-US full inventory with fee owned lands loaded before overlapping management designations, and easements). The Vector Analysis File ("PADUS3_0VectorAnalysisFile_ClipCensus.zip") associated item of PAD-US 3.0 Spatial Analysis and Statistics ( https://doi.org/10.5066/P9KLBB5D ) was clipped to the Census state boundary file to define the extent and serve as a common denominator for statistical summaries. Boundaries of interest to stakeholders (State, Department of the Interior Region, Congressional District, County, EcoRegions I-IV, Urban Areas, Landscape Conservation Cooperative) were incorporated into separate geodatabase feature classes to support various data summaries ("PADUS3_0VectorAnalysisFileOtherExtents_Clip_Census.zip") and Comma-separated Value (CSV) tables ("PADUS3_0SummaryStatistics_TabularData_CSV.zip") summarizing "PADUS3_0VectorAnalysisFileOtherExtents_Clip_Census.zip" are provided as an alternative format and enable users to explore and download summary statistics of interest (Comma-separated Table [CSV], Microsoft Excel Workbook [.XLSX], Portable Document Format [.PDF] Report) from the PAD-US Lands and Inland Water Statistics Dashboard ( https://www.usgs.gov/programs/gap-analysis-project/science/pad-us-statistics ). In addition, a "flattened" version of the PAD-US 3.0 combined file without other extent boundaries ("PADUS3_0VectorAnalysisFile_ClipCensus.zip") allow for other applications that require a representation of overall protection status without overlapping designation boundaries. The "PADUS3_0VectorAnalysis_State_Clip_CENSUS2020" feature class ("PADUS3_0VectorAnalysisFileOtherExtents_Clip_Census.gdb") is the source of the PAD-US 3.0 raster files (associated item of PAD-US 3.0 Spatial Analysis and Statistics, https://doi.org/10.5066/P9KLBB5D ). Note, the PAD-US inventory is now considered functionally complete with the vast majority of land protection types represented in some manner, while work continues to maintain updates and improve data quality (see inventory completeness estimates at: http://www.protectedlands.net/data-stewards/ ). In addition, changes in protected area status between versions of the PAD-US may be attributed to improving the completeness and accuracy of the spatial data more than actual management actions or new acquisitions. USGS provides no legal warranty for the use of this data. While PAD-US is the official aggregation of protected areas ( https://www.fgdc.gov/ngda-reports/NGDA_Datasets.html ), agencies are the best source of their lands data.

The global big data market is forecasted to grow to 103 billion U.S. dollars by 2027, more than double its expected market size in 2018. With a share of 45 percent, the software segment would become the large big data market segment by 2027. What is Big data? Big data is a term that refers to the kind of data sets that are too large or too complex for traditional data processing applications. It is defined as having one or some of the following characteristics: high volume, high velocity or high variety. Fast-growing mobile data traffic, cloud computing traffic, as well as the rapid development of technologies such as artificial intelligence (AI) and the Internet of Things (IoT) all contribute to the increasing volume and complexity of data sets. Big data analytics Advanced analytics tools, such as predictive analytics and data mining, help to extract value from the data and generate new business insights. The global big data and business analytics market was valued at 169 billion U.S. dollars in 2018 and is expected to grow to 274 billion U.S. dollars in 2022. As of November 2018, 45 percent of professionals in the market research industry reportedly used big data analytics as a research method.

MethodsThe objective of this project was to determine the capability of a federated analysis approach using DataSHIELD to maintain the level of results of a classical centralized analysis in a real-world setting. This research was carried out on an anonymous synthetic longitudinal real-world oncology cohort randomly splitted in three local databases, mimicking three healthcare organizations, stored in a federated data platform integrating DataSHIELD. No individual data transfer, statistics were calculated simultaneously but in parallel within each healthcare organization and only summary statistics (aggregates) were provided back to the federated data analyst.Descriptive statistics, survival analysis, regression models and correlation were first performed on the centralized approach and then reproduced on the federated approach. The results were then compared between the two approaches.ResultsThe cohort was splitted in three samples (N1 = 157 patients, N2 = 94 and N3 = 64), 11 derived variables and four types of analyses were generated. All analyses were successfully reproduced using DataSHIELD, except for one descriptive variable due to data disclosure limitation in the federated environment, showing the good capability of DataSHIELD. For descriptive statistics, exactly equivalent results were found for the federated and centralized approaches, except some differences for position measures. Estimates of univariate regression models were similar, with a loss of accuracy observed for multivariate models due to source database variability.ConclusionOur project showed a practical implementation and use case of a real-world federated approach using DataSHIELD. The capability and accuracy of common data manipulation and analysis were satisfying, and the flexibility of the tool enabled the production of a variety of analyses while preserving the privacy of individual data. The DataSHIELD forum was also a practical source of information and support. In order to find the right balance between privacy and accuracy of the analysis, set-up of privacy requirements should be established prior to the start of the analysis, as well as a data quality review of the participating healthcare organization.

Abstract

The harmonized data set on health, created and published by the ERF, is a subset of Iraq Household Socio Economic Survey (IHSES) 2012. It was derived from the household, individual and health modules, collected in the context of the above mentioned survey. The sample was then used to create a harmonized health survey, comparable with the Iraq Household Socio Economic Survey (IHSES) 2007 micro data set.

----> Overview of the Iraq Household Socio Economic Survey (IHSES) 2012:

Iraq is considered a leader in household expenditure and income surveys where the first was conducted in 1946 followed by surveys in 1954 and 1961. After the establishment of Central Statistical Organization, household expenditure and income surveys were carried out every 3-5 years in (1971/ 1972, 1976, 1979, 1984/ 1985, 1988, 1993, 2002 / 2007). Implementing the cooperation between CSO and WB, Central Statistical Organization (CSO) and Kurdistan Region Statistics Office (KRSO) launched fieldwork on IHSES on 1/1/2012. The survey was carried out over a full year covering all governorates including those in Kurdistan Region.

The survey has six main objectives. These objectives are:

1. Provide data for poverty analysis and measurement and monitor, evaluate and update the implementation Poverty Reduction National Strategy issued in 2009.
2. Provide comprehensive data system to assess household social and economic conditions and prepare the indicators related to the human development.
3. Provide data that meet the needs and requirements of national accounts.
4. Provide detailed indicators on consumption expenditure that serve making decision related to production, consumption, export and import.
5. Provide detailed indicators on the sources of households and individuals income.
6. Provide data necessary for formulation of a new consumer price index number.

The raw survey data provided by the Statistical Office were then harmonized by the Economic Research Forum, to create a comparable version with the 2006/2007 Household Socio Economic Survey in Iraq. Harmonization at this stage only included unifying variables' names, labels and some definitions. See: Iraq 2007 & 2012- Variables Mapping & Availability Matrix.pdf provided in the external resources for further information on the mapping of the original variables on the harmonized ones, in addition to more indications on the variables' availability in both survey years and relevant comments.

Geographic coverage

National coverage: Covering a sample of urban, rural and metropolitan areas in all the governorates including those in Kurdistan Region.

Analysis unit

1- Household/family. 2- Individual/person.

Universe

The survey was carried out over a full year covering all governorates including those in Kurdistan Region.

Kind of data

Sample survey data [ssd]

Sampling procedure

----> Design:

Sample size was (25488) household for the whole Iraq, 216 households for each district of 118 districts, 2832 clusters each of which includes 9 households distributed on districts and governorates for rural and urban.

----> Sample frame:

Listing and numbering results of 2009-2010 Population and Housing Survey were adopted in all the governorates including Kurdistan Region as a frame to select households, the sample was selected in two stages: Stage 1: Primary sampling unit (blocks) within each stratum (district) for urban and rural were systematically selected with probability proportional to size to reach 2832 units (cluster). Stage two: 9 households from each primary sampling unit were selected to create a cluster, thus the sample size of total survey clusters was 25488 households distributed on the governorates, 216 households in each district.

----> Sampling Stages:

In each district, the sample was selected in two stages: Stage 1: based on 2010 listing and numbering frame 24 sample points were selected within each stratum through systematic sampling with probability proportional to size, in addition to the implicit breakdown urban and rural and geographic breakdown (sub-district, quarter, street, county, village and block). Stage 2: Using households as secondary sampling units, 9 households were selected from each sample point using systematic equal probability sampling. Sampling frames of each stages can be developed based on 2010 building listing and numbering without updating household lists. In some small districts, random selection processes of primary sampling may lead to select less than 24 units therefore a sampling unit is selected more than once , the selection may reach two cluster or more from the same enumeration unit when it is necessary.

Mode of data collection

Face-to-face [f2f]

Research instrument

----> Preparation:

The questionnaire of 2006 survey was adopted in designing the questionnaire of 2012 survey on which many revisions were made. Two rounds of pre-test were carried out. Revision were made based on the feedback of field work team, World Bank consultants and others, other revisions were made before final version was implemented in a pilot survey in September 2011. After the pilot survey implemented, other revisions were made in based on the challenges and feedbacks emerged during the implementation to implement the final version in the actual survey.

----> Questionnaire Parts:

The questionnaire consists of four parts each with several sections: Part 1: Socio – Economic Data: - Section 1: Household Roster - Section 2: Emigration - Section 3: Food Rations - Section 4: housing - Section 5: education - Section 6: health - Section 7: Physical measurements - Section 8: job seeking and previous job

Part 2: Monthly, Quarterly and Annual Expenditures: - Section 9: Expenditures on Non – Food Commodities and Services (past 30 days). - Section 10 : Expenditures on Non – Food Commodities and Services (past 90 days). - Section 11: Expenditures on Non – Food Commodities and Services (past 12 months). - Section 12: Expenditures on Non-food Frequent Food Stuff and Commodities (7 days). - Section 12, Table 1: Meals Had Within the Residential Unit. - Section 12, table 2: Number of Persons Participate in the Meals within Household Expenditure Other Than its Members.

Part 3: Income and Other Data: - Section 13: Job - Section 14: paid jobs - Section 15: Agriculture, forestry and fishing - Section 16: Household non – agricultural projects - Section 17: Income from ownership and transfers - Section 18: Durable goods - Section 19: Loans, advances and subsidies - Section 20: Shocks and strategy of dealing in the households - Section 21: Time use - Section 22: Justice - Section 23: Satisfaction in life - Section 24: Food consumption during past 7 days

Part 4: Diary of Daily Expenditures: Diary of expenditure is an essential component of this survey. It is left at the household to record all the daily purchases such as expenditures on food and frequent non-food items such as gasoline, newspapers…etc. during 7 days. Two pages were allocated for recording the expenditures of each day, thus the roster will be consists of 14 pages.

Cleaning operations

----> Raw Data:

Data Editing and Processing: To ensure accuracy and consistency, the data were edited at the following stages: 1. Interviewer: Checks all answers on the household questionnaire, confirming that they are clear and correct. 2. Local Supervisor: Checks to make sure that questions has been correctly completed. 3. Statistical analysis: After exporting data files from excel to SPSS, the Statistical Analysis Unit uses program commands to identify irregular or non-logical values in addition to auditing some variables. 4. World Bank consultants in coordination with the CSO data management team: the World Bank technical consultants use additional programs in SPSS and STAT to examine and correct remaining inconsistencies within the data files. The software detects errors by analyzing questionnaire items according to the expected parameter for each variable.

----> Harmonized Data:

• The SPSS package is used to harmonize the Iraq Household Socio Economic Survey (IHSES) 2007 with Iraq Household Socio Economic Survey (IHSES) 2012.
• The harmonization process starts with raw data files received from the Statistical Office.
• A program is generated for each dataset to create harmonized variables.
• Data is saved on the household and individual level, in SPSS and then converted to STATA, to be disseminated.

Response rate

Iraq Household Socio Economic Survey (IHSES) reached a total of 25488 households. Number of households refused to response was 305, response rate was 98.6%. The highest interview rates were in Ninevah and Muthanna (100%) while the lowest rates were in Sulaimaniya (92%).