index_age | R Documentation |
Summary measures of migration age profiles as proposed by Rogers (1975), Bell et. al. (2002), Bell and Muhidin (2009) and Bernard, Bell and Charles-Edwards (2014)
index_age(
d = NULL,
age,
mi,
age_min = 5,
age_max = 65,
breadth = 5,
age_col = "age",
mi_col = "mi",
long = TRUE
)
d |
Data frame of age specific migration intensities. If used, ensure the correct column names are passed to |
age |
Numeric vector of ages. Used if |
mi |
Numeric vector of migration intensities corresponding to each value of |
age_min |
Numeric value for minimum age for peak calculations. Taken as 5 by default. |
age_max |
Numeric value for maximum age for peak calculations. Taken as 65 by default. |
breadth |
Numeric value for number of age groups around peak to be used in breadth_peak measure. Default of |
age_col |
Character string of the age column name (when |
mi_col |
Character string of the migration intensities column name (when |
long |
Logical to return a long data frame with index values all in one column |
A tibble with 8 summary measures where
gmr |
Gross migraproduction rate of Rogers (1975) |
peak_mi |
Peak migration intensities, from Bell et. al. (2002) |
peak_age |
Corresponding age of |
peak_breadth |
Breadth of peak, from Bell and Muhidin (2009) |
peak_share |
Percentage share of peak breadth of all migration, from Bell and Muhidin (2009) |
murc |
Maximum upward rate of change of Bernard, Bell and Charles-Edwards (2014) |
mdrc |
Maximum downward rate of change of Bernard, Bell and Charles-Edwards (2014) |
asymmetry |
Asymmetry between the |
Rogers, A. (1975). Introduction to Multiregional Mathematical Demography. Wiley.
Bell, M., Blake, M., Boyle, P., Duke-Williams, O., Rees, P. H., Stillwell, J., & Hugo, G. J. (2002). Cross-national comparison of internal migration: issues and measures. Journal of the Royal Statistical Society: Series A (Statistics in Society), 165(3), 435–464. https://doi.org/10.1111/1467-985X.00247
Bell, M., & Muhidin, S. (2009). Cross-National Comparisons of Internal Migration (Research Paper 2009/30; Human Development Reports).
Bernard, A., Bell, M., & Charles-Edwards, E. (2014). Improved measures for the cross-national comparison of age profiles of internal migration. Population Studies, 68(2), 179–195. https://doi.org/10.1080/00324728.2014.890243
library(dplyr)
ipumsi_age %>%
filter(sample == "BRA2000") %>%
mutate(mi = migrants/population) %>%
index_age()
ipumsi_age %>%
group_by(sample) %>%
mutate(mi = migrants/population) %>%
index_age(long = FALSE)
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