Adds a new case study "Estimating Dynamic Cross-National Opinion Using Existing Survey Data" by @cbpclaassen. This PR fixes some issues with PR #195 (with author's permission), which I will close. Will go ahead and merge this since #195 was already reviewed.
Adds a new case study "Estimating Dynamic Cross-National Opinion Using Existing Survey Data" by @cbpclaassen. This PR fixes some issues with PR #195 (with author's permission), which I will close. Will go ahead and merge this since #195 was already reviewed.