True Portugal RDD Sample for National Representative Data
Our Portugal RDD sample is the backbone of global telephone surveys, opinion polling and social research. The industry Gold Standard RDD Sample is used by over 350 Think Tanks, government agencies, fieldwork agencies and corporate clients.
RDD Portfolio
Going beyond random sampling for Portugal
Our random sampling is backed by a transparent methodology and enhanced filtering for fieldwork efficiency.
Mobile RDD Sample
Expand your reach with an updated mobile RDD sample including provider information covering every single phone number in Portugal
Dual-Frame RDD sample for Portugal
The mixed Dual-Frame approach mode combines both landline and mobile and is designed to reduce bias data, increase the response rate and reach a larger audience. In some countries such as Portugal, older respondents or females can be reached easier this way.
Landline RDD Sample
Sample Solutions provides a fully geo-coded landline RDD sample with removed business listings to the market research industry. Keep in mind that the landline share has been declining in Portugal.
RDD records delivered
Countries Covered
RDD Projects annually
Coverage
Our Portugal RDD sample connects with 9 million individuals for your research.
In Portugal, mobile phones are much more frequently used than landline numbers. According to data from the National Communications Authority (Anacom), as of 2020, the country had a mobile penetration rate of 119.4%, meaning there were more active mobile phone subscriptions than there were people in the country. In contrast, landline penetration stood at just 32.8%, highlighting the diminishing use of traditional fixed-line telephones. The shift towards mobile phones in Portugal can be attributed to various factors, including the convenience and mobility offered by mobile devices, as well as the increasing availability of affordable mobile plans and smartphones. For many Portuguese people, using a mobile phone as their primary means of communication has become the norm, rendering landline numbers almost obsolete. As a result, telecommunications companies in Portugal have been focusing more on enhancing their mobile services and coverage, while landline services are largely being phased out. While landline numbers may still be used in certain households or businesses, the trend towards mobile phone dominance in Portugal is likely to continue in the years to come.
Sample Solutions for methodological sampling
The RDD sample Portugal provided comes with full country information such as frame coverage, potential bias or mobile & landline access data.
Testimonials
Sample some of our Testimonials
Global Resources, SSRS
D3 Systems, Inc.
Verian
DT&P international
Past Projects
Sampling coverage when other modes fail.
Some of our previous projects included surveys in Crimea, Greenland, data collection in Syria as well as Afghanistan. We can sample when other data collection modes are close to impossible. With all these countries covered, you understand why sampling for Portugal is not an issue for us.
ESRA Presentation
Big Data Matching
Using Big Data applications to Decrease The Coverage Error and Sample Bias in European Establishment Surveys
AAPOR Poster
IVR Phone Surveys
Screened mobile sample for IVR surveys in developing countries 2020 Paper – The case of Sri Lanka and Ecuador
WAPOR Presentation
From CAPI to CATI
By looking at Greece and comparing a Face-2-Face and CATI study using our RDD Dual-Frame RDD Sample
Recognized by global standards
A yearly re-certification for ISO 27001, ISO 20252 in combination with a dedicated policy document, sampling methodologies and quality structure ensures enterprise level sampling quality.
- ISO 27001
- ISO 20252
- GDPR Ready
RDD Sample Process
Our Portugal RDD Sample Generation
Over the years, we built a comprehensive RDD frame for Portugal to fit various needs for conducting international projects and we have worked hard to earn a trusted network of customers all based on a solid methodology.
Frequently Asked Questions
Got any questions about sampling for Portugal using RDD? We’re here to help
As data controller you can provide them with a link to our data subject request and we can pick it up from there.
Our database is global in terms of coverage. However through Western Europe and North America we have the best in-country coverage and depth of data.
We generally have the owner or Managing Director as contact. If needed we can add other direct contact people that are relevant for your research.
Turnaround time is usually 2-3 working days.
No problem, take a glance at our data enrichment options which can help you to enrich missing data points.
