ELECTION FORECAST / SIMULATION MODEL
Created by TRUTHISALL
National Polling data: Pollingreport.com
State Polling data: Electoral-vote.com
NATIONAL POLL AVERAGE AND PROJECTIONS (%)
National model - based on 15 polls
State model proj. - based on latest state polls
Projections assume 70% of undecided/other to Kerry
______Curr.Proj. Proj. Comb.
______Nat. Nat. State Proj. EV
Kerry:48.60 53.45 52.95 53.20 330
Bush :44.47 46.55 47.05 46.80 208
Diff : 4.13 6.91 5.90 6.41 122
Und/oth:6.93
WIN PROBABILITIES (%)
Current Prob. assumes current split of undec/other
Proj. Probabilities assumes 70% undec/other to Kerry
______Nat. Model State Comb.
______Curr. Proj. Proj. Proj.
Kerry:90.55 97.95 98.00 97.97
Bush: 9.45 2.05 2.00 2.03
NATIONAL VOTE/ WIN PROBABILITY SENSITIVITY ANALYSIS
Impact of various Kerry undecided/other allocations
Alloc:50% 60% 70% 80% 90%
Vote: 52.07 52.76 53.45 54.15 54.84
Prob: 88.92 94.87 97.95 99.29 99.79
ELECTORAL VOTE/ WIN PROBABILITY SENSITIVITY ANALYSIS
One thousand (1000) trials are run in each simulation.
Simulation I: Conservative Case
Assume: 60% of undecided/other to Kerry.
Kerry: 52.03% of the vote.
Wins : 92.8% of 1000 election trials.
Avg : 313 electoral votes.
Max : 392 electoral votes.
Simulation II: Most Likely Case
Assume: 70% of undecided/other to Kerry.
Kerry: 52.95% of the vote.
Wins : 98.0% of 1000 election trials.
Avg : 330 electoral votes.
Max : 408 electoral votes.
Simulation III: Optimistic Case
Assume: 80% of undecided/other to Kerry.
Kerry: 53.88% of the vote.
Wins : 99.7% of 1000 election trials.
Avg : 348 electoral votes.
Max : 441 electoral votes.
LAST THREE PRESIDENTIAL ELECTIONS
(in millions of votes)
Dem 138.78 52.61%
Rep 125.03 47.39%
BUSH JOB APPROVAL
The data source is PollingReport.com
2004 Avg Nwk Fox CNN Pew Harris CBS ABC Time NBC AP Zogby
Jan. 54.50 50 58 60 56 na 50 58 54 54 56 49
Feb. 49.67 48 48 51 48 51 50 50 54 na 47 na
Mar. 48.75 48 48 49 46 na 51 50 na 50 48 na
Apr. 48.80 49 50 52 48 48 46 51 49 na 48 47
May 45.20 42 48 47 44 na 41 47 46 47 48 42
June 47.00 na 48 49 48 50 42 47 na 45 48 46
July 48.00 48 47 47 46 na 45 50 50 48 50 49
Aug 45.86 45 44 48 na na 44 47 na na 49 44
NATIONAL POPULAR VOTE TREND
Based on latest national polls from:
IBD, ABC, NWK, ARG, CBS, PEW, LAT, ZOGBY, TIME
Data source: PollingReport.com
Kerry projected vote equals the poll average
plus 70% of undecided/other voters.
Avg Poll Trend Projection
2004 Kerry Bush Diff Kerry Bush Diff
Jan 44.00 49.40 -5.40 46.45 53.56 -7.11
Feb 48.00 45.43 2.57 52.60 47.40 5.20
Mar 48.57 44.00 4.57 53.77 46.23 7.54
Apr 47.38 44.88 2.50 52.80 47.20 5.60
May 47.75 44.00 3.75 53.53 46.48 7.05
June 47.14 44.71 2.43 52.84 47.16 5.69
July 48.11 45.00 3.11 52.93 47.07 5.87
Aug 49.71 43.71 6.00 54.31 45.69 8.63
KERRY NATIONAL POPULAR VOTE FORECAST/WIN PROBABILITIES
48.60% Average (mean) of most recent 15 national polls
4.85% + Kerry 70% allocation of undecided/other
53.45% = Projected Kerry vote
97.95% Kerry probability of at least 50% of popular
vote
______ Kerry% Kerry% undecided/other
______ Date Kerry Bush vs.Bush 50% 60% 70% 80% 90%
TIME 807 51 43 54.3 54.0 54.6 55.2 55.8 56.4
FOX 804 46 43 51.7 51.5 52.6 53.7 54.8 55.9
CNN/GAL 801 48 48 50.0 50.0 50.4 50.8 51.2 51.6
LAT 721 48 46 51.1 51.0 51.6 52.2 52.8 53.4
PEW 718 46 44 51.1 51.0 52.0 53.0 54.0 55.0
IBD 806 49 43 53.3 53.0 53.8 54.6 55.4 56.2
CBS 730 49 43 53.3 53.0 53.8 54.6 55.4 56.2
DEMC 805 52 45 53.6 53.5 53.8 54.1 54.4 54.7
ABC/WP 802 52 45 53.6 53.5 53.8 54.1 54.4 54.7
NWK 730 52 44 54.2 54.0 54.4 54.8 55.2 55.6
ZOGBY 729 48 43 52.7 52.5 53.4 54.3 55.2 56.1
AP 806 48 45 51.6 51.5 52.2 52.9 53.6 54.3
NBC/WSJ 721 45 47 48.9 49.0 49.8 50.6 51.4 52.2
ARG 801 49 45 52.1 52.0 52.6 53.2 53.8 54.4
QPAC 722 46 43 51.7 51.5 52.6 53.7 54.8 55.9
Mean ______ 48.60 44.47 52.22 52.07 52.76 53.45 54.15 54.84
Prob ______ ______ ______ 90.55 88.92 94.87 97.95 99.29 99.79
MoE: 3.31%
Std: 1.69%
95% Confidence Interval
Max ______ 51.91 47.78 55.53 55.38 56.07 56.77 57.46 58.15
Min ______ 45.29 41.15 48.91 48.75 49.45 50.14 50.83 51.53
x ______ 47.78 47.78 50.00 50.00 50.00 50.00 50.00 50.00
Prob>x ______ 68.62 2.50 90.55 88.92 94.87 97.95 99.29 99.79
99% Confidence Interval
Max ______ 52.96 48.83 56.58
Min ______ 44.24 40.11 47.86
x ______ 48.83 48.83 50.00
Prob>x ______ 44.63 0.49 90.55
95% Confidence Limits:
Max = Mean + 1.96 * StdP
Min = Mean - 1.96 * StdP
99% Confidence Limits:
Max = Mean + 2.58 * StdP
Min = Mean - 2.58 * StdP
ELECTORAL VOTE SIMULATION FORECAST METHODOLOGY
Kerry National and State Vote Projections
State vote%: Latest state poll plus assumed share of
undecided/other voters.
National vote%:Weighted sum of projected % state
votes.
Probability of a state win is based on projected %
vote.
Most Likely Case
Assume 70% of undecided/other voters for Kerry
Win Prob. Pct EV
Kerry 98.0% 53.0% 330
Bush 2.0% 47.0% 208
Historical Vote %, Kerry Projection and Win Probability
Dem Hist. is Democratic share of 2-party vote in last three
presidential elections.
______ Dem Kerry Kerry EV (election trials 1-10 of 1000)
______ Hist. Proj. Prob. 1 2 3 4 5 6 7 8 9 10
State 52.60% 52.95% 98.00% 339 327 291 330 311 375 332 334 315 303
AL 44.8 41.0 0.0
AK 37.6 40.7 0.0
AZ 48.8 49.9 49.0 10 10 10 10 10 10
AR 55.2 50.2 52.0 6 6 6 6
CA 57.4 57.3 96.6 55 55 55 55 55 55 55 55 55 55
CO 48.8 49.3 43.1 9 9 9 9
CT 57.7 62.6 99.9 7 7 7 7 7 7 7 7 7 7
DE 56.8 57.1 96.2 3 3 3 3 3 3 3 3 3 3
DC 90.3 89.5 100.0 3 3 3 3 3 3 3 3 3 3
FL 50.7 54.9 89.0 27 27 27 27 27 27 27 27 27
GA 47.6 45.9 15.3 15
HI 59.0 60.9 99.7 4 4 4 4 4 4 4 4 4 4
ID 35.7 39.0 0.3
IL 57.9 58.9 98.7 21 21 21 21 21 21 21 21 21 21
IN 44.8 45.9 15.3 11
IA 51.8 52.2 70.9 7 7 7 7 7 7 7 7
KS 42.4 41.6 1.8
KY 46.7 46.2 17.1 8 8
LA 49.2 44.4 8.1 9
ME 57.1 52.3 71.7 4 4 4 4
MD 57.8 58.6 98.4 10 10 10 10 10 10 10 10 10 10
MA 65.3 65.8 100.0 12 12 12 12 12 12 12 12 12 12
MI 54.7 56.9 95.8 17 17 17 17 17 17 17 17 17 17
MN 55.7 52.6 74.2 10 10 10 10 10 10
MS 44.3 36.3 0.0
MO 52.5 51.1 60.8 11 11 11 11 11 11 11
MT 44.9 42.8 3.6
NE 37.5 36.5 0.0
NV 49.9 51.3 62.7 5 5 5 5 5 5
NH 51.7 55.3 90.7 4 4 4 4 4 4 4 4
NJ 56.5 62.8 99.9 15 15 15 15 15 15 15 15 15 15
NM 53.0 54.9 89.0 5 5 5 5 5 5 5 5 5
NY 62.6 65.0 100.0 31 31 31 31 31 31 31 31 31 31
NC 46.6 47.5 26.6 15 15 15
ND 40.8 37.2 0.1
OH 50.8 48.9 39.2
OK 42.8 39.2 0.3
OR 53.6 52.8 75.8 7 7 7 7 7 7 7 7
PA 54.2 55.2 90.3 21 21 21 21 21 21 21 21 21
RI 65.6 67.2 100.0 4 4 4 4 4 4 4 4 4 4
SC 44.4 47.5 26.6 8 8 8
SD 44.5 44.8 9.7
TN 50.5 50.2 52.0 11 11 11 11 11 11
TX 44.3 42.6 3.2 34
UT 33.6 29.7 0.0
VT 59.4 60.1 99.4 3 3 3 3 3 3 3 3 3 3
VA 47.3 49.9 49.0 13 13 13 13 13 13
WA 55.9 55.2 90.3 11 11 11 11 11 11 11 11 11 11
WV 54.0 53.6 81.6 5 5 5 5 5 5 5 5 5
WI 52.7 51.9 68.3 10 10 10
WY 38.3 30.8 0.0
Avg 52.60% 52.95% 98.00% 339 327 291 330 311 375 332 334 315 303