Lec 8 - ElectoralSystemsandParty Systems 2/5/09...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
Electoral Systems and Party Systems 2/5/09
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Why study elections/electoral systems? Malleable Observable Affect things we care about: Party system Representation Participation Accountability Composition of government
Background image of page 2
Number of Parties The “So what” question: why should we care? How do we count parties? What is a party? How do we count? # that register # that compete # that win votes # that win seats
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Counting Parties Compare the following distributions .25, .25, .25, .25 .45, .45, .05, .05 .82, .06, .06, .06 All appear as 4 party systems.
Background image of page 4
Effective Number of Parties • ENP = 1/( v i 2 ) or 1/( s i 2 ) Vote shares --> effective number of electoral parties Seat shares --> effective number of legislative parties .25, .25, .25, .25 --> ENP=4 .45, .45, .05, .05 --> ENP=2.4 .82, .06, .06, .06 -->ENP=1.5
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
fragmentation? Why do we get a large number of parties?
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/07/2009 for the course POLISCI 389 taught by Professor Allenhicken during the Winter '09 term at University of Michigan.

Page1 / 19

Lec 8 - ElectoralSystemsandParty Systems 2/5/09...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online