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⁴⁹ In unreported analyses, we include the Least Squares Index of disproportionality (or LSI), which measures the disparity between the distribution of votes for various electoral parties in an election and the distribution of seat allocation in parliament, thus essentially reflecting the degree to which electoral parties become parliamentary parties (see Michael Gallagher, ‘Proportionality, Disproportionality and Electoral Systems’, Electoral Studies, 10 (1991), 33–51). This, too, is not significantly associated with domestic terrorism.

⁵⁰ Though no hypothesis is made about the direct relationship between ELF and terrorism, it is worth noting that that relationship is statistically insignificant.

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