surv10: Estimate survival curve from censuses spaced 10 years apart.
In timriffe/DemoTools: Standardize, Evaluate, and Adjust Demographic Data

surv10

R Documentation

Estimate survival curve from censuses spaced 10 years apart.

Description

This function reproduces calculations through column H of CENSUR~1.XLS by Griff Feeney. Censuses are assumed to be spaced 10 years apart and population counts for both censuses in 5-year age groups. The staggered ratio of these approximates lifetable function npx =1-nqx, i.e. probability of surviving between age x and age x+n. The cumulative product of this approximates the survival function lx.

Usage

surv10(pop1, pop2)

Arguments

`pop1`	numeric. Vector of population counts in 5-year age groups of census 1.
`pop2`	numeric. Vector of population counts in 5-year age groups of census 2.

Details

Checking for census spacing of 10 years must happen prior to this function. Also, we assume the open age group has already been trimmed off.

Value

Survival function lx as a numeric vector with radix 1.

Examples

# 1960 vs 1970 pops
pop1 <- c(3831870,4502304,5397061,4630775,4193184,4114704,3770907,3274822,
		2744786,2559755,2160716,1839025,1494043,1133409,870238,577972,313781)
pop2 <- c(4292503,3988292,3852101,4492096,5347327,4571868,4190340,4085338,
		3674127,3198934,2648360,2382691,1970485,1584699,1172155,736258,408191)
surv10(pop1,pop2)

timriffe/DemoTools documentation built on Oct. 14, 2024, 12:53 p.m.