What is Calculus Of Voting?

Legal Definition
Calculus of voting refers to any mathematical model which predicts voting behaviour by an electorate, including such features as participation rate. A calculus of voting represents an hypothesized decision-making process.

These models are used in political science in an attempt to capture the relative importance of various factors influencing an elector to vote (or not vote) in a particular way.
-- Wikipedia
Legal Definition
Refers to any mathematical model which predicts voting behavior by an electorate, including such features as participation rate. A calculus of voting represents an hypothesized decision-making process.