In this project, we analyzed whether mobile phone-based surveys are a feasible and cost-effective approach for … + /- 5 to 7 percent, while Zimbabwe's estimates were more precise (sampling error of + /- 2.8 percent). Surveys performed …

In this project, we analyzed whether mobile phone-based surveys are a feasible and cost-effective approach for … /- 5 to 7 percent, while Zimbabwe’s estimates were more precise (sampling error of /- 2.8 percent). Surveys performed …