The state is devided into a relatively small number of large districts, each of which sends a large-ish number of members to the parliament.
SMDP (single-member-district purality systems)
Mayoría Simple
The State is devided into a set of districts, usually having roughly equal populations. One representative is elected from each district to be a member of the legislative body os state, and whoever gets a plurality of the votes wins the seat.
Plurality of Votes:
Is the largest number of votes cast for any candidate; if there are many candidates running, the plurality may be less than a majority of votes cast.
Rules of state can, if they wish, write many detailed differences into their electoral systems.
The trade-off between the two systems is one fairness to minorities and small parties, on the one hand, versus simplyfying the party sytem by weeding out small parties,
Paradox of voting
If things are considered from this perspective, no one who is sensible should vote.
Referendum
A device by wich the voters choose directly through their ballots whether a particular proposal will become law.
Party Identification
In most of the time one person is going to vote by party no matter what is going on.