Most of the long-running studies use the comparative manifesto project data, which tends to skew european but covers more than just hot-button issues. I think

Most of the long-running studies use the comparative manifesto project data, which tends to skew european but covers more than just hot-button issues. I think it includes Japan and Aus/NZ but not sure about the latter. See https://doi.org/10.1111/1467-9248.12015 https://doi.org/10.1111/1467-9248.12015 for info on the range of questions people in the field think this data can answer.