I would like to create a data viz to show, in one chart, where some of the major economies are on the trilemma. It won't be perfect, but I'm just looking for a rough characterization. For my data viz to work, all three need to be quantitative not qualitative. Some bits I have already tracked down quantitative measures:
Independent monetary policy: There's an index for this
Fixed exchange rate: The wiki can be an ordinal variable for this
So I'm stuck at capital mobility. I have googled "capital mobility" and related terms but I'm a bit skeptical of the results.