Lexis diagram
Encyclopedia
In demography
(the branch of statistics
that deals with the study of populations) a Lexis diagram (named after economist and social scientist Wilhelm Lexis
) is a two dimensional diagram that is used to represent events (such as births or deaths) that occur to individuals belonging to different cohort
s. Calendar time is usually represented on the horizontal axis, while age is represented on the vertical axis. In some textbooks the y-axis is plotted backwards, with age 0 at the top of the page and increasing downwards. However, other arrangements of the axes are also seen. As an example the death of an individual in 2009 at age 80 is represented by the point (2009,80); the cohort of all persons born in 1929 is represented by a diagonal line starting at (1929,0) and continuing through (1930,1) and so on.
Demography
Demography is the statistical study of human population. It can be a very general science that can be applied to any kind of dynamic human population, that is, one that changes over time or space...
(the branch of statistics
Statistics
Statistics is the study of the collection, organization, analysis, and interpretation of data. It deals with all aspects of this, including the planning of data collection in terms of the design of surveys and experiments....
that deals with the study of populations) a Lexis diagram (named after economist and social scientist Wilhelm Lexis
Wilhelm Lexis
Wilhelm Lexis was an eminent German statistician, economist, and social scientist and a founder of the interdisciplinary study of insurance....
) is a two dimensional diagram that is used to represent events (such as births or deaths) that occur to individuals belonging to different cohort
Cohort (statistics)
In statistics and demography, a cohort is a group of subjects who have shared a particular time together during a particular time span . Cohorts may be tracked over extended periods in a cohort study. The cohort can be modified by censoring, i.e...
s. Calendar time is usually represented on the horizontal axis, while age is represented on the vertical axis. In some textbooks the y-axis is plotted backwards, with age 0 at the top of the page and increasing downwards. However, other arrangements of the axes are also seen. As an example the death of an individual in 2009 at age 80 is represented by the point (2009,80); the cohort of all persons born in 1929 is represented by a diagonal line starting at (1929,0) and continuing through (1930,1) and so on.