英和和英

The numerical values of demographic functions are generally listed in tables ¹, such as life tables (431-1), fertility tables (634-1), or nuptiality tables (522-1). A distinction is usually made between calendar-year tables ² or period tables ² which are based upon observations collected during a limited period of time, and cohort tables ³ or generation tables ³ which deal with the experience of a cohort throughout its lifetime. A multiple decrement table ⁴ illustrates the simultaneous effects of several non-renewable events, such as the effects of first marriage and death on the single population. The most used are double decrement tables ⁴. More...