AHMET GÜL

Founder & General Manager | Senior Statistician

Sampling & Survey Methodology Expert | M&E & Research Specialist

30+ Years of Professional Experience | 20+ Years at TURKSTAT | Nationwide Research Expertise | International Development Projects

Ahmet Gül is the Founder and General Manager of ID Research&Consultancy and a senior statistician with more than 30 years of professional experience in statistics, sampling methodology, large-scale survey research, field operations, quality assurance and advanced statistical analysis.

Before establishing İstatistik Dünyası, he spent more than two decades at the Turkish Statistical Institute (TURKSTAT), with extensive professional experience particularly in sampling methodology and official statistics. This background forms the methodological foundation of his approach to representative survey design, field implementation and data quality.

He founded İstatistik Dünyası Research & Consultancy in 2010. Building on this institutional experience, ID Research&Consultancy was subsequently developed as the company’s internationally oriented research and consultancy brand.

Today, he provides scientific, statistical and methodological leadership for ID Research&Consultancy’s national and international research portfolio.

CORE EXPERTISE

Sampling & Survey Methodology

Advanced probability sampling, stratified and multi-stage sampling, sample allocation, sampling frames, weighting, post-stratification, non-response adjustment and representative survey design.

Large-Scale Field Research

Design and management of complex nationwide household, enterprise and population surveys, including CAPI, CATI and CAWI data-collection systems and multi-regional field operations.

Quality Assurance & Quality Control

Development of integrated QA/QC frameworks, interviewer and supervisor structures, field monitoring, back-checks, validation procedures, consistency controls and real-time data-quality monitoring.

Monitoring & Evaluation

Baseline and endline research, impact-oriented studies, indicator development, monitoring frameworks and evidence-based programme and policy evaluation.

Advanced Statistical Analysis

Survey weighting, multivariate analysis, statistical modelling, reliability and validity studies, index development and interpretation of complex quantitative datasets.

Research Design

Integrated quantitative and qualitative research design, questionnaire development, sampling strategies, analytical frameworks and methodological planning.

SELECTED INTERNATIONAL & INSTITUTIONAL EXPERIENCE

Ahmet Gül has provided methodological, statistical, sampling and research leadership across major assignments associated with international development organizations and public institutions.

His portfolio includes projects associated with:

World Bank • World Health Organization (WHO) • UNICEF • International Labour Organization (ILO) • UN Women • UNDP

as well as ministries, public authorities, universities and research institutions.

SELECTED FLAGSHIP PROJECT EXPERIENCE

WORLD BANK / KOSGEB

Nationwide SME Access to Finance Research

Large-scale nationwide enterprise research covering 11,062 micro, small and medium-sized enterprises across all 81 provinces of Türkiye.

The assignment involved advanced sampling, nationwide field implementation, weighting, quality assurance, data management and statistical analysis.

WORLD HEALTH ORGANIZATION / MINISTRY OF HEALTH

Türkiye Household Health Survey – NCD Risk Factors | 2017 & 2023

Nationwide population-based health research requiring representative sampling, standardized data-collection procedures, large-scale field organization and rigorous quality-control systems.

WORLD BANK / MINISTRY OF HEALTH

Experience in World Bank-supported research assignments involving large-scale survey implementation, sampling, field management and statistical methodology.

UNICEF

Research experience involving KAP studies, education-related research and impact-evaluation/RCT-oriented assignments, combining methodological design, quantitative fieldwork and data-quality management.

INTERNATIONAL LABOUR ORGANIZATION – ILO

Large-scale labour-market and employment research, including studies focusing on young people and NEET populations, with multi-province survey implementation and impact-oriented research components.

UN WOMEN

Large-scale quantitative research focusing on women’s social and economic participation, rural populations and vulnerable groups, supported by extensive regional field operations.

UNDP

Research and fieldwork experience within international development programmes involving environmental and social research, evidence generation and stakeholder-oriented studies.

METHODOLOGICAL APPROACH

Reliable evidence begins with scientifically designed samples and high-quality data.

Ahmet Gül’s methodological approach integrates four fundamental components:

Representative Sampling → Rigorous Fieldwork → Systematic QA/QC → Evidence-Based Analysis

Rather than treating sampling, data collection, quality control and statistical analysis as separate processes, his approach considers them as interconnected elements of a single research system.

This philosophy constitutes one of the methodological foundations of ID Research&Consultancy.

LEADERSHIP AT ID RESEARCH&CONSULTANCY

As Founder and General Manager, Ahmet Gül leads the methodological development of ID Research&Consultancy and provides senior-level oversight particularly in:

Research Design • Sampling Strategy • Survey Methodology • Fieldwork Architecture • QA/QC • Weighting • Statistical Analysis • Monitoring & Evaluation

Under his leadership, the organization has developed the operational infrastructure required to conduct complex research assignments across all 81 provinces of Türkiye, while expanding its capacity for international projects and cross-border research partnerships.

AT A GLANCE

30+ YEARS
Professional experience in statistics and research

20+ YEARS
Professional experience at TURKSTAT

81 PROVINCES
Nationwide research and fieldwork capability

11,062 SMEs
Major nationwide World Bank/KOSGEB enterprise research

2017 & 2023
WHO–Ministry of Health nationwide health survey field experience

INTERNATIONAL EXPERIENCE
World Bank • WHO • UNICEF • ILO • UN Women • UNDP

SPECIALISATION
Sampling • Survey Methodology • QA/QC • M&E • Statistical Analysis • Large-Scale Field Research

ID Research&Consultancy

ID Research&Consultancy is an international research and consultancy brand of İstatistik Dünyası, established in Türkiye in 2010.

Built on statistical expertise. Driven by reliable data. Ready for global research partnerships.

 

PROF. DR. HASAN HÜSEYİN TATLIDİL
Senior Academic Advisor | Professor of Statistics
Sampling • Econometrics • Multivariate Analysis • Impact Assessment

44+ Years of Academic & Professional Experience
World Bank • UNDP • European Union Projects

PROFILE

Prof. Dr. Hasan Hüseyin Tatlıdil is a senior statistician and academic with more than 44 years of professional and academic experience. His expertise spans sampling, econometrics, multivariate statistical analysis, statistical modelling, nonparametric methods, socio-economic indicators, development statistics, financial risk analysis and impact assessment. He has combined advanced statistical theory with extensive applied experience in national and international development, public-policy and research assignments.

CORE EXPERTISE

Sampling & Survey Methodology — Representative sampling, survey design, complex quantitative research and methodological oversight.

Econometrics & Statistical Modelling — Econometric modelling, logistic/probit approaches, forecasting and quantitative modelling.

Multivariate Statistical Analysis — Advanced multivariate methods, classification, data reduction and decision-support applications.

Impact Assessment — Statistical evaluation of social programmes, public policies and development interventions.

Development & Socio-Economic Statistics — Employment, human development, socio-economic indicators and comparative statistical assessment.

Financial Risk & Decision Analysis — Value-at-Risk, financial modelling, banking analysis and quantitative decision methods.

INTERNATIONAL & INSTITUTIONAL EXPERIENCE

Prof. Tatlıdil has undertaken senior methodological and statistical roles in assignments involving the World Bank, United Nations Development Programme (UNDP), European Union, State Planning Organization, Ministry of Labour, Ministry of Tourism, Ministry of Health and Ministry of National Education. His roles have included Team Leader, Project Coordinator, Sampling Expert, Statistical Analysis Expert, Econometric Modelling Expert and Impact Assessment Specialist.

SELECTED FLAGSHIP PROJECT EXPERIENCE

UNDP | Addressing Invasive Alien Species Threats at Key Marine Biodiversity Areas
Team Leader | 2021

European Union | Improving the Social Integration and Employability of Disadvantaged Persons
Sampling Expert | 2017

European Union | Increasing the Adaptability of Employers and Employees in the Tourism Sector
Sampling & Statistical Analysis Expert | 2016

UNDP | Legal Awareness Knowledge, Attitudes and Perceptions (KAP) Survey
Sampling & Statistical Analysis Expert | 2012

World Bank / Ministry of National Education | Second Basic Education Project – Beneficiary Evaluation Survey
Sampling & Analysis Expert | 2007

World Bank | Social Risk Mitigation Project – Conditional Cash Transfer Evaluation
Sampling & Econometric Modelling Expert | 2005

Baku–Tbilisi–Ceyhan Oil Pipeline Project | Survey of Affected Landowners and Land Users
Sampling Expert | 2002

ACADEMIC LEADERSHIP

His academic and institutional leadership experience includes Head of the Department of Statistics at Hacettepe University, Chair of the Theoretical Statistics Section, Vice Rector and Acting Dean at Lefke University, Head of Research, Planning and Coordination at the Turkish Employment Organization, and Chair of the Employment Policy Committee for Türkiye’s Sixth Five-Year Development Plan.

RESEARCH & PUBLICATIONS

Prof. Tatlıdil has an extensive publication record across multivariate statistics, econometrics, financial risk, banking, socio-economic development, labour markets, human development and statistical modelling. His work has appeared in international and national refereed journals, conference proceedings, academic books and research reports. He is also author/co-author of reference works on Multivariate Statistical Analysis, Nonparametric Statistical Methods and Public Opinion Research. His work on human development was referenced in the UNDP Human Development Report 1993.

ROLE AT ID RESEARCH&CONSULTANCY

Senior Academic Advisor

As a Senior Academic Advisor to ID Research&Consultancy, Prof. Dr. Hasan Hüseyin Tatlıdil contributes senior-level academic and methodological expertise to complex research and evaluation assignments, particularly in sampling, survey methodology, multivariate analysis, econometrics, statistical modelling, impact assessment, development statistics and research design. His involvement strengthens ID Research&Consultancy’s capacity to combine rigorous academic methodology with large-scale operational research and field implementation.

 

AT A GLANCE

44+ YEARS	Academic & professional experience
PROFESSOR OF STATISTICS	Long-standing Hacettepe University academic career
INTERNATIONAL PROJECTS	World Bank • UNDP • European Union
SENIOR ROLES	Team Leader • Sampling Expert • Statistical Analysis Expert • Econometric Modelling Expert
CORE SPECIALISATION	Sampling • Econometrics • Multivariate Analysis • Impact Assessment

 

PROF. DR. LÜTFİYE HİLAL ÖZCEBE

Academic Adviser | Public Health • Epidemiology • Health Behaviour • Tobacco Control

297 Total Publications

109 Scopus Publications

19 Projects

12 Scopus H-index

Profile Highlights

Prof. Dr. Lütfiye Hilal Özcebe is a senior public health scholar with extensive academic and applied research experience in public health, epidemiology, behavioural sciences, child and adolescent health, school health, tobacco control and health promotion. She is a medical doctor, a specialist in Public Health and holds a PhD in Family Health. Her work has a strong focus on population- and community-based research, health behaviours, risk factors, health literacy and preventive health policy.

Academic & Leadership Experience

• Long-standing academic career in Public Health at Hacettepe University Faculty of Medicine; Professor since 2003.
• Director, Hacettepe University Institute of Public Health (2012–2016).
• Deputy Director, Hacettepe University Institute of Public Health (2000–2012).
• Member of the Hacettepe University Executive Board / Rectorate (2013–2016).
• Extensive teaching and supervision experience at undergraduate, specialty, master’s and doctoral levels.

Core Areas of Expertise

• Public Health & Epidemiology
• Child & Adolescent Health
• School Health
• Tobacco Control
• Health Promotion & Health Literacy
• Behavioural Sciences & Risk Behaviours
• Gender and Health
• Population-based & Community-based Research
• Injury Prevention & Safety

Selected International & Policy-Level Experience

• Contributions to World Health Organization (WHO)-related work and publications on tobacco control and MPOWER implementation in Türkiye.
• Project experience in UNFPA-supported community-based reproductive health and youth reproductive health initiatives.
• National consultancy for youth reproductive health training modules under the Ministry of Health / European Union Türkiye Reproductive Health Programme.
• Advisory contributions to the Ministry of Health in tobacco control, obesity control, non-communicable diseases, cancer and child health.
• National and international research collaborations covering childhood obesity, tobacco use, youth risk behaviours, migrant health, antibiotic use and community health.

Selected Research & Publication Themes

• Gender and women’s tobacco use (2025).
• Physicians’ perspectives on dementia diagnosis in Türkiye (2025).
• Risk factors for substance use among Turkish-origin immigrants in Germany (2024).
• Waterpipe smoking among university students (BMC Public Health, 2022).
• WHO European Childhood Obesity Surveillance Initiative (COSI) research (2021).
• Multi-country research on rational antibiotic use among Turkish migrants in Europe.
• Tobacco control legislation, smoking behaviours and tobacco visibility in media.

Value as an Adviser to ID Research&Consultancy

Prof. Dr. Özcebe’s expertise provides a strong public-health complement to ID Research&Consultancy’s methodological, survey and fieldwork capabilities. Her background in epidemiology, health behaviour/KAP research, tobacco control, child and adolescent health, school health and health policy can add substantial academic value to research, evaluation and field assignments for international development institutions and public-health partners, including WHO, UNICEF, UNFPA, the World Bank and European Union programmes.

Selected Academic Metrics

AVESIS records 297 publications in total, including 108 WoS-indexed and 109 Scopus-indexed publications, with a Scopus H-index of 12. The profile also records 19 projects.