Replication Data for: Two Implications of Survey Research Mode during War: Evidence from Russia’s Full-Scale Invasion of Ukraine

Conducting social science research during an active war raises distinct challenges. To investigate the relationship between both coverage and social desirability bias, we carry out a multi-mode study (web, telephone) with two independently drawn samples of the Ukrainian population during Russia's full-scale invasion of Ukraine in the summer of 2022. We employ identical demographic and behavioral questions in both surveys and pre-register a framing experiment to investigate reported differences in volunteering activities between modes. Observationally, we find that because web studies cannot reach the oldest and most rural Ukrainians, they likely contain much more significant coverage bias with respect to war-related demographic variables compared to the telephone sample. Experimentally, consistent with other studies that report greater social desirability bias in interviewer-mediated models, we find evidence of inflation in reporting volunteering activities only in the telephone survey. Our results demonstrate that, given modern survey techniques, wartime attitudes and behavior in Ukraine can be reliably measured, but there is a trade-off in survey modes between coverage bias and social desirability bias.