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Dalberg Research is an efficient partner for complex quantitative surveys. Our sample sizes range from 50 to 25,000 respondents. For the best quality, we prefer Computer-Assisted Personal Interviews (CAPI). We have our own scripting team, field forces and devices. Our proprietary quality control and reporting system is further refined after every major project. Where our quality standards can be met by cheaper survey channels, we are happy to revert to phone, IVR, SMS and online surveys