Supplemental Materials for “Dimensionality and the Number of Parties in Legislative Elections”

In Tables 1–4, we present key excerpts from the variance–covariance matrices of the coefficients for the original Models 3, 4, 5 and 6, all rounded to two significant digits. These matrices will allow interested readers to approximately replicate the calculation of the confidence intervals for the marginal effects of dimensionality that were presented in the main paper’s Table 3. The complete variance–covariance matrices are available in electronic format from the author. Note that the robust Newey-West standard errors are calculated in STATA 7.0 using the time series cross-section extension to the “newey” command developed by Roodman (2002).