In self-administered web and paper mode surveys, the Choice+ protocol, which offers both modes concurrently but with a differentially higher incentive for responding by web, has been shown to increase the share of responses obtained by web and to increase response rates overall relative to a concurrent design with equal incentive amounts. This protocol was initially adopted for the 2020 Healthy Chicago Survey. After observing fewer than 20% of the 2020 completes coming via paper, however, an experiment was fielded in the 2021 administration to evaluate a sequential variant of the Choice+ protocol in which the paper mode was only …