Use this classifier as a concise description of the supplied demographic indicators, with the tool's thresholds kept visible in reports.

Phase

Phase of the first demographic transition.

CBR band

Conventional crude birth rate band for the phase.

CDR band

Conventional crude death rate band for the phase.

Growth pattern

Population growth behaviour of the phase.

Hallmark

One-line hallmark of the phase.

Transition stages are descriptive models, not universal laws or causal forecasts. Countries can follow different paths, reverse temporarily, or combine characteristics assigned to several stages.

Complement the stage label with the underlying time series for fertility, mortality, age structure, and household behavior. Trends show mixed or reversing patterns that a single category cannot express.

• Demographic Dividend Phase Classifier

  Classify the demographic dividend phase from age shares using the stated rule: child dependency above old-age dependency with a total dependency ratio over 70 is pre-dividend, otherwise early-dividend; once old-age dependency meets or exceeds child dependency a ratio of 70 or less is late-dividend and above 70 is post-dividend.

• Omran Epidemiologic Transition Classifier

  Assign the epidemiologic transition stage from life expectancy at birth under the stated band rule (under 40 pestilence and famine, under 50 receding pandemics, otherwise degenerative and man-made diseases, with 75 or over split into Olshansky-Ault delayed degenerative diseases only in the four-stage framework).

• Second Transition Features Checker

  Count which of the four classic second-demographic-transition markers are present (below-replacement fertility, postponed parenthood, rising union instability or cohabitation, household diversification) and label the profile full at four markers, partial at two or three, absent otherwise.