- Knowledge of the behaviour of the voters in the different electoral callings (national, local, European Parliament).
- Institutions that intervene
- General description (main variables)
- Votes placed, abstentions, votes obtained by political party.
- Polling stations
- Frequency of data collection
- Municipal o inferior
- Budgetary credits necessary for its finance in the four-year period 1997-2000 (in thousands pesetas)