91. IPUMS TERRA (Terra Populus: Integrated Data on Population and Environment) Bookmark Format Data archive or collection
92. Low- and Middle-Income Country Primary Health Care Expenditures Bookmark Format Series - completed
94. Measurement of Cross-cutting Cleavages and Other Multidimensional Cleavage Structures Bookmark Format Series - ongoing
98. Minding the Gaps: Solidaristic Transfers and Burden-Sharing in the European Union and its Member States’ Pandemic Response Bookmark Format Single study