Table A2.
Determinants of national party voting in the European Parliament. (The dependent variable is the average position of a national party's group of MEPs on dimension 1 or 2 in a particular European Parliament (5-year period). The positions of the MEPs on the dimensions are produced by applying the W-NOMINATE method of ideal point estimation to all the roll-call votes in each European Parliament. The parameters are estimated by linear OLS regression. Standard errors in parentheses. *p≤0.05, **p≤0.01. Dummy variables for each European Parliament are included but not reported.)
| dimension 1 scores | dimension 2 scores | variable summary statistics | ||||||
|---|---|---|---|---|---|---|---|---|
| (1) | (2) | (3) | (4) | mean | s.d. | min | max | |
| dependent variable: average W-NOMINATE score of a national party's group of MEPs in a European Parliament | dim.1 scores: | 0.018 | 0.490 | −0.903 | 0.863 | |||
| dim.2 scores: | −0.055 | 0.449 | −0.953 | 0.927 | ||||
| left–right position of national party | 1.686** (0.053) | 0.826** (0.062) | −0.206* (0.089) | −0.257* (0.104) | 0.503 | 0.229 | 0 | 1 |
| EU integration position of national party | 0.193** (0.056) | −0.033 (0.049) | 0.601** (0.079) | 0.174* (0.081) | 0.716 | 0.277 | 0.000 | 1.000 |
| national party is in government | 0.052 (0.033) | 0.019 (0.020) | 0.129** (0.047) | 0.036 (0.034) | 0.381 | 0.486 | 0.000 | 1.000 |
| national party has a commissioner | 0.064 (0.038) | −0.006 (0.025) | 0.253** (0.053) | 0.017 (0.042) | 0.216 | 0.407 | 0 | 1 |
| constant | −0.893** (0.062) | −0.317** (0.062) | −0.575** (0.095) | −0.457** (0.103) | ||||
| political group fixed effects | No | Yes** | No | Yes** | ||||
| member state fixed effects | No | No | No | No | ||||
| observations | 352 | 352 | 352 | 352 | ||||
| adjusted R-squared | 0.696 | 0.890 | 0.290 | 0.632 | ||||