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Screened mobile sample for IVR surveys
in developing countries 2020 Paper
– The case of Sri Lanka and Ecuador

ESRA Paper: Using Big Data to Decrease Coverage Error and Sample Bias in European Establishment Surveys

Sampling Methodology
for low incidence audience

RDD Methodologies >

We provide more than 174 countries with
mobile and landline RDD Sample

WAPOR Paper: Going from CAPI to CATI