Probabilistic Voting Model Flashcards

1
Q

In reality, sometime voters can best elect, but not affect policies. What is this known as

A

Political principle agent problem (agent i.e parties who act on behalf of principles i.e voters, act in self interest)

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2
Q

Why may voters not exclusively consider candidates policy when voting for candidates (2)

(What non-policy factors do they consider) (2)

A

Vote on ideology/sympathy.

May also not have/be able to process the full information

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3
Q

Main criticism of MVT

A

Unrealistic to believe individuals base votes on just policy - Non-policy factors like sympathy exist irl!, likeability, looks!

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4
Q

Similarity between MVT and PVM

A

Both predict policy convergence

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5
Q

Probabilistic voting model main characteristic

A

Introduces voters’ subjective perceptions on top of their preferences for policy

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6
Q

Mechanism of MVT vs PVM

A

MVT - median voter determines policy outcome

PVM - swing voter determines policy outcome

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7
Q

PVM setup:

2 candidates A and B: each opportunistic

Candidates simultaneously but independently choose policy which consists of 2 issues e.g gov size and foreign policy

What can we immediately notice from this that differs from MVT

A

Multi-dimensional unlike MVT which only considers one policy

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8
Q

3 voter groups, poor, middle, rich
Yp<Ym<Yr

Proportion of population is thus
ap, am, ar

Every voter i can differ in ideology

Voting behaviour depends on: (3)

A

Policy
Individual ideology towards a candidate σij
Candidate average popularity before election (the shock) δ

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9
Q

Voter i votes for B if…

A

Uj (Xb,Yb) + σij + δ > Uj(Xa,Ya)

(utility from candidate B’s 2 policies) + individual ideology + shock
has to be > utility from the other candidate A’s 2 policies

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10
Q

Ideology σij (ideology of a voter i in group j.
Key assumption

B) what does σij mean if
>0
<0
=0

A

Assume ideology follows uniform distribution centered on neutral ideology i.e where = 0

b)
σiJ > 0 means voter i is ideologically closer to B.
σiJ < 0 means voter i is ideologically closer to A.
σiJ = 0 means that voter i is neutral.

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11
Q

Scandals δ can reduce one and increase others. Assumption for popularity

B)
δ>0
δ<0

A

Uniform distribition centred on neutral ideology
δ=0

B)
δ>0 = shock favours B
δ<0 = shock favours A

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12
Q

Timeline: step 1 - electoral campaign: candidates announce simultaneously
(Xa, Ya) and (Xb, Yb)

Step 2: shock δ may occur

Step 3: election takes place, voters vote

Step 4: winner implements policy

A
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13
Q

Swing voter

A

The voter who after considering each policy platform, and average popularity (the shock) is indifferent between the 2 candidates

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14
Q

Swing voter expression

A

σj > Uj (Xa,Ya) - Uj (Xb, Yb) - δ

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15
Q

Why is swing voter the most importanst

A

Because a small change in policy platform is sufficient to gain her vote. Easiest to change opinion

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16
Q

Issue candidates face

A

Do not know average popularity is known, i.e do not know who the swing voter is (only know probability of shock)

17
Q

Candidates strategies: they have to set policies before average popularity is known.

So how do they maximise probability of being elected?

A

Consider scandals

18
Q

Who will vote for candidate A

A

People left of swing voter.

19
Q

Area of the voters for A

20
Q

When does A win election

A

When Πa > 0.5

Rearrange to find δ (scandal threshold below which A wins)

21
Q

First result we get:

A

A wins if not hit by a scandal. But they do not know the value of the threshold, so maximises probability of winning

22
Q

So A maximises probability of winning:

A’s maximisation problem

B) what to note about the weightings between groups i.e which groups are given more relevance (2)

A

More relevance given to larger group (higher aj i.e proportion) and to the less ideological group (higher ΩJ density)

(Since more likely contain swing voters)

23
Q

What does B do?

A

Since also unaware of value of shock threshold, Performs same maximisation process to max probability to win, mirroring A

Thus set same policy platform! Xa, Ya = Xb, Yb
Policy convergence!

24
Q

So PVM on why candidates please swing voter

A

Less ideological i.e less care about sympathy, looks etc (no loyalty towards a certain candidate) and more sensitive to policy of candidates, so thus easier to change their vote.

25
Q

1st novelty is swing voter

2nd novelty of PVT

A

Election outcome could be determined by a scandal shock

26
Q

How to determine swing voters?

A

Density of a group (ΦJ) - higher = weaker ideological bias, so more sensitive to policy proposals and thus more likely swing group

27
Q

How does empirical evidence align with PVM

A

We see US presidential candidates visit swing states more often.

(E.g trump visiting SS)

28
Q

How many visits in 2004 were to swing states

A

3/5 visits in 2004 were to swing states e.g Florida, Ohio

29
Q

Do swing states get more funds resources (Swing Voter Hypothesis)

A

No. Amount of funds allocated does not depend on number of swing voters

30
Q

Electoral battleground hypothesis

B) does it hold

A

Distributive goods should be disproportionately allocated to constituencies where 2 top parties have roughly equal supporters (since more competitive there…)

B) no

31
Q

Partisan supporters hypothesis

Does it hold

A

Politicians favour areas that contain a large % of their core supporters

B) no

32
Q

Larcinese also tests government spending on vote choice

A

Find spending has little/no effect on voter choice

However ideology has large effects, thus justifying the probabilistic voting model!