| Party |
| Modified aggregation | Deviations from strict proportionality (power―seats) |
| SPD | seats (rel.) | 0.254736842 |
|
|
| ex ante | 0.291411 | 0.0366742 |
|
| ex post | 0.179639259 | −0.0750976 |
| U SPD | seats (rel.) | 0.154 |
|
| (1919-1924) | ex ante | 0.139715 | −0.014285 |
|
| ex post | 0.1057972 | −0.0482028 |
| DNVP | seats (rel.) | 0.138947368 |
|
|
| ex ante | 0.126354053 | −0.0125933 |
|
| ex post | 0.113363011 | −0.0255843 |
| Zentrum | seats (rel.) | 0.139635857 |
|
|
| ex ante | 0.129780053 | −0.0098558 |
|
| ex post | 0.155244942 | 0.0156091 |
| BVP | seats (rel.) | 0.037010234 |
|
|
| ex ante | 0.034639444 | −0.0023708 |
|
| ex post | 0.090371939 | 0.0533617 |
| DVP | seats (rel.) | 0.084253906 |
|
|
| ex ante | 0.077607053 | −0.0066469 |
|
| ex post | 0.136149469 | 0.0518955 |
| DDP | seats (rel.) | 0.058270387 |
|
|
| ex ante | 0.052078947 | −0.00619144 |
|
| ex post | 0.124839478 | 0.066569091 |
| NSDAP | seats (rel.) | 0.132896772 |
|
| (1924-1933) | ex ante | 0.148824857 | 0.015928085 |
|
| ex post | 0.116784334 | −0.016112438 |
| Wirtschafts- | seats (rel.) | 0.024752883 |
|
| partei | ex ante | 0.023595211 | −0.001157672 |
|
| ex post | 0.029837938 | 0.005085055 |
| KPD | seats (rel.) | 0.096936858 |
|
|
| ex ante | 0.094663278 | −0.00227358 |
|
| ex post | 0.045465496 | −0.051471362 |
| Dt.-Hannov. | seats (rel.) | 0.006994286 |
|
| Partei | ex ante | 0.006280333 | −0.000713953 |
|
| ex post | 0.001587514 | −0.005406772 |
| Christl.-nat. | seats (rel.) | 0.020770765 |
|
| Landvolk (1924-1933) | ex ante | 0.018560071 | −0.002210694 |
|
| ex post | 0.012855946 | −0.007914819 |
| CSVD | seats (rel.) | 0.015807965 |
|