Incidence

Incidence may refer to:

Economics

Benefit incidence, the availability of a benefit
Expenditure incidence, the effect of government expenditure upon the distribution of private incomes
Fiscal incidence, the economic impact of government taxation and expenditures on the economic income of individuals
Tax incidence, analysis of the effect of a particular tax on the distribution of economic welfare

Incidence algebra, associative algebra used in combinatorics, a branch of mathematics
Incidence geometry, the study of relations of incidence between various geometrical objects
Incidence (geometry), the binary relations describing how subsets meet
Incidence list, a concept in graph theory
Incidence matrix, a matrix that shows the relationship between two classes of objects
Incidence structure, a feature of combinatorial mathematics
Cumulative incidence, a measure of frequency

Angle of incidence, a measure of deviation of something from "straight on"
Incidence (epidemiology), a measure of the risk of developing some new condition within a specified period of time
Plane of incidence, relating to optical reflection