The document discusses different models of representation and electoral systems. It describes trustee and delegate models of representation, where representatives have differing levels of autonomy from their constituents. It also outlines different voting systems like plurality/majority, proportional representation and mixed systems. It analyzes advantages and disadvantages of each system in terms of proportionality, strong government, and representation of voter preferences. Finally, it discusses models of voting behavior like party identification, rational choice, sociological, and dominant ideology perspectives.