Online Gerrymander calculator (Voting power asymmetry)

Enter the by district vote counts below and hit submit to calculate the amount and direction of gerrymandering.

To see how the numbers are calculated click: view source.

For an explanation of how these measures are calculated, see this document.

Score	Democrats	Republicans	Difference	Sum
speech per voter

Enter district votes (one line per district):

Election 1
Democratic votes	Republican votes
<?php if( isset($_POST['dem_votes1'])) { echo $_POST['dem_votes1']; } ?>	<?php if( isset($_POST['rep_votes1'])) { echo $_POST['rep_votes1']; } ?>
Election 2
Democratic votes	Republican votes
<?php if( isset($_POST['dem_votes2'])) { echo $_POST['dem_votes2']; } ?>	<?php if( isset($_POST['rep_votes2'])) { echo $_POST['rep_votes2']; } ?>
Election 3
Democratic votes	Republican votes
<?php if( isset($_POST['dem_votes3'])) { echo $_POST['dem_votes3']; } ?>	<?php if( isset($_POST['rep_votes3'])) { echo $_POST['rep_votes3']; } ?>

"; $s = -$p * log($p); $l = - log($p); //accumulate everything $dp += $p*$avgd; $rp += $p*$avgr; $ds += $s*$avgd; $rs += $s*$avgr; $dl += $l*$avgd; $rl += $l*$avgr; $sumd += $avgd; $sumr += $avgr; ?>

District	Democrats	Republicans	mu	sigma	p(dem)	p(tie)	p(rep)

0 = blue, 0 = gray, < 0 = rep echo ""; $color = "purple"; if( $diff > 0) { $color = "blue"; } if( $diff < 0) { $color = "red"; } echo ""; echo ""; } ?>

# Dem seats	# Rep seats	Probability
".$i."	".(($count)-$i)."	".$histogram[$i]."

Expectation:
Dem seats
Rep seats

$dp , "rep_p" => $rp, //power (avg likelihood to affect outcome) "dem_l" => $dl , "rep_l" => $rl, //power (avg log likelihood to affect outcome) "dem_s" => $ds , "rep_s" => $rs, //speech ); } include 'footer.php'; ?>