notes Population Projections

notes Population Projections - Eco 572: Research methods in...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Eco 572: Research methods in Demography Population Projections This unit illustrates the use of the cohort component method in population projections. All calculations are done in Mata. An alternative version of this handout using only Stata is available here. Reading The Data We will use the data from Sweden used in Box 6.1 (page 125 in the textbook), available as file Sweden93.dat to save you some typing. We read the population counts, the life table, and the fertility rates, and copy them to Mata. The last age group is 85+ and 'big-L' for that age is actually time lived after age 85. We also express person-years per birth, dividing by l 0 . . infile age p L f using /// > http://data.princeton.edu/eco572/datasets/sweden93.dat (18 observations read) . list +-------------------------------+ | age p L f | |-------------------------------| 1. | 0 293395 497487 0 | 2. | 5 248369 497138 0 | 3. | 10 240012 496901 0 | 4. | 15 261346 496531 .012 | 5. | 20 285209 495902 .0908 | |-------------------------------| 6. | 25 314388 495168 .1499 | 7. | 30 281290 494213 .1125 | 8. | 35 286923 492760 .0441 | 9. | 40 304108 490447 .0074 | 10. | 45 324946 486613 .0003 | |-------------------------------| 11. | 50 247613 480665 0 | 12. | 55 211351 471786 0 | 13. | 60 215140 457852 0 | 14. | 65 221764 436153 0 | 15. | 70 223506 402775 0 | |-------------------------------| 16. | 75 183654 350358 0 | 17. | 80 141990 271512 0 | 18. | 85 112424 291707 0 | +-------------------------------+ . mata: ------------------------------------------------- mata (type end to exit) ------------------------------------------- : p93 = st_data(.,"p") : L = st_data(.,"L")/100000 : f = st_data(.,"f") : sum(p93) 4397428 : end --------------------------------------------------------------------------------------------------------------------- The Leslie Matrix We will write a function to compute a Leslie matrix given person-years 5 L x (with the convention that the last value is
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/12/2008 for the course ECON 572 taught by Professor Rodriguez during the Spring '06 term at Princeton.

Page1 / 4

notes Population Projections - Eco 572: Research methods in...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online