Lexis Diagram Cell Classifier
Classify a Lexis diagram cell from its two bounded dimensions using the relation cohort = period minus age, naming the class (age-period AP, period-cohort PC or cohort-age LC), the free dimension and the interval the free dimension sweeps.
Description
Classify a Lexis diagram cell from its two bounded dimensions using the relation cohort = period minus age, naming the class (age-period AP, period-cohort PC or cohort-age LC), the free dimension and the interval the free dimension sweeps.
Classify a Lexis diagram cell from its two bounded dimensions using the relation cohort = period minus age, naming the class (age-period AP, period-cohort PC or cohort-age LC), the free dimension and the interval the free dimension sweeps.1
When to use Lexis Diagram Cell Classifier
Use this measure to summarize a defined population, period, and denominator before combining it with other demographic rates or projections.
- Age interval
- Age bounds; leave empty when age is not one of the bounded dimensions.
- Period interval
- Calendar-period bounds; leave empty when period is unbounded.
- Cohort interval
- Birth-cohort bounds; leave empty when cohort is unbounded.
How the method works
- Class
- Two-letter code of the Lexis class.
- Class name
- Human-readable class name.
- Free dimension
- Dimension left free by the two bounded ones.
- Free interval
- Lower and upper value swept by the free dimension.
- Span
- Width of the interval swept by the free dimension in years.
- Diagonal
- True when the free span is zero, i.e. a single-cohort diagonal line.
Limitations and assumptions
Results are comparable only when populations, periods, age bands, event definitions, and denominators are aligned. Aggregates can conceal subgroup differences and measurement error.
Alternative or Complementary measures
Complement the aggregate with age-, sex-, region-, or cohort-specific results. Counts and rates should be reported together when the population at risk changes materially across comparisons.
References
-
Demography — Wikipedia contributors
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