Questions tagged [demography]

Demography is the statistical study of populations and their characteristics, such as births, deaths, migrations, consequences of changes, etc.

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1answer
49 views

How to group countries with similar age distributions?

How can I group the world's 200-odd countries into (say) ten groups, with each group's countries having 'similar' age distributions? I want to compare COVID-19 fatality rates across countries. But the ...
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1answer
45 views

How can both life expectancy and death rate increase over 70 years time for a country?

I see death rate and life expectancy for Greece. For the first there is a constant growth from 1994 which is envisaged to grow up to 2068. For the latter there is a constant grown from 1950 which is ...
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164 views

Covid-19 and life expectancy

A public figure in my home country said the following: "The life expectancy in our country is 82 years. The average age of those who die of covid-19 is also about 82 years. Hence, on average, ...
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2answers
3k views

Why does the US death rate not “match” life expectancy

From the CDC (https://www.cdc.gov/nchs/fastats/deaths.htm): Death rate: 863.8 deaths per 100,000 population Life expectancy: 78.6 years Now in a static situation I ...
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0answers
52 views

A reference request for a population statistic---experienced population density?

We all know that countries (for example) have population densities, but suppose we want to know what is the actual experienced population density (that is, if, say, in Sweden 95% of the population ...
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0answers
19 views

How to test which factors are responsible for a change in a variable over time?

I have survey data from two waves: one in 2019, one in 2020. There is a large change in one of the survey answers, and I would like to test which respondent characteristics are responsible for that ...
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1answer
24 views

How to Describe Interaction Between Variables

Say I have two demographic variables, job$\in{j_1, j_2}$ and lives$\_$alone$\in${YES, NO}. I also have N books $B_1$, $\ldots$, $B_N$, each labelled with a genre that I know in advance, out of {...
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0answers
34 views

Including multiple-select race/ethnicity in statistical models

I'm performing some survey research that has a strong demographic component. During the survey participants are asked to select any races they identify with, along with a number of other demographic ...
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1answer
107 views

Viral topics. How to describe and characterize bumps in time series of tag-activity on Meta Stack Exchange

Background There is much dissatisfaction on StackExchange. This can now be covered in over 250 questions on meta (see 1 and 2). In response to that I made a recent meta-post and supported it with the ...
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0answers
191 views

Can a k-means cluster use different measures for homogeneity and heterogeneity?

TL;DR: Is there an existing k-means clustering algorithm that can have different weights for the (minimized) in-group distance measure and the (maximized) between-group measure? Or, better yet, can ...
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0answers
45 views

How can I construct a confidence interval for the age dependency ratio?

Say I have a simple random sample of people from a given country, and I estimate the elderly dependency ratio in the population by taking the ratio of the number of people aged 65+ over the number ...
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1answer
23 views

Representation of $l_x, d_x, L_x, T_x$

There are some problems in my textbook where a life table is given, with some of the entries missing. Based on the given entries, I have to fill up the complete life table. Suppose it is given $l_0 = ...
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0answers
39 views

I'm comparing multiple demographics across multiple samples, Chi-square test or 2 sample t-test

I would like to compare the demographics of people my company serves with the demographics contained in a subset of the American Community Survey 2017 data. The first set (n=35751) of data is a person-...
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1answer
572 views

Can someone explain homicide-related death rates?

If I see a statistic of homicide-related deaths per 100,000 is that per 100,000 deaths therefore giving an expected probability of death when dividing one by the other? or is it deaths by homicide per ...
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1answer
41 views

Estimation of a population number

Suppose that we know the population number $n$ of a country in $2014$ for people aged between $0$ and $19$ years what would be a good simple way to estimate the population number between $1$ and $18$ ...
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39 views

Concept of Stationary Population

In stationary population, there can be different probabilities for death in a given year for different age groups but these probabilities don't change over time. So the probability a 28 year old will ...
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0answers
34 views

“Number of Persons” instead of “Number of Person-years” in Stationary Population [closed]

I have learnt that the life table function $_{n}L_x$ is the number of person-years lived by the cohort between ages $x$ and $x+n$. But for stationary population, $_{n}L_x$ is defined as the number ...
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1answer
376 views

Non-monotone hazard functions

I should start with the caveat that I am relatively new to Survival analysis. I was watching a Hulu documentary about Crocodiles last night, and they mentioned that baby crocodiles have a low chance ...
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1answer
23 views

Distinction between “Mid-year population” and “Number of people alive”

Suppose $D_i=$ Observed number of deaths in the age group $(x_i, x_{i+1})$, $P_i=$ Mid-year population for age group $(x_i, x_{i+1})$, $N_i=$ Number of people alive at $x_i$ among whom $d_i$ ...
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1answer
256 views

Probability Vs Rate

Suppose $_{n}q_x$ is the $\textbf{probability}$ of dying between age $x$ and $x+n$. And $_{n}M_x$ is the age-specific death $\textbf{rate}$ in the observed population in the interval $(x, x+n)$. The ...
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1answer
53 views

Sparkline type visualisation of demographics in papers (introducing new 'non-standard' visuals)

It seems typical to include only basic statistics on subject demographics within papers (i.e. mean, max and min). It seems to me that having a knowledge of the actual distribution would be provide ...
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1answer
71 views

Propensity Score Matching on demographic baseline

A client asks for a PSM on gender for their big dataset of >10000 cases. About 20 variables are supposed to be included, most of them binomial. They hypothesize, that a certain treatment has worse ...
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1answer
28 views

How to get the number of target audience?

I am currently working on a project, a sample start-up. Suppose I have these data: $N$ = total population. $n_1$ = number of mall shoppers. $n_2$ = number of people aged from 18-65. $n_3$ = number ...
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0answers
52 views

Computing within-group diversity index in R

I am working with a df that has race and sex demographic variables. There is also a grouping variable indicating the work unit each individual observation belongs to. i.e., I want to compute a within-...
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1answer
1k views

Structural Equation Modeling with ordinal dependent variable and categorical independent variable

I'd like to do a structural equation modeling for an ordinal dependent variable. Moreover, I have ordinal and categorical independent variables in the model. The ordinal dependent variable is the ...
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0answers
148 views

Age specific population interpolation: Why Cubic Spline interpolation is not giving sum equal to original sum

Because of Age heaping, I want to smooth age-specific population derived from the census of Pakistan. The Cubic spline is assumed as an appropriate choice. However, the fitted spline is not giving the ...
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2answers
799 views

What does “mean age at childbearing” mean? [closed]

I'm having trouble putting this into plain English. According to the UN World Population Prospects glossary it means: The mean age at childbearing is the mean age of mothers at the birth of their ...
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0answers
190 views

Log-linear analysis of transition matrices using R

I have some demographic transition matrices that I want to compare using a log linear analysis, but am having some trouble with model construction in R. I have read through several tutorials on log-...
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1answer
2k views

How to draw a map of a cluster analysis results

I have performed k-mean clustering on a demographic data set. Now I wish to show the results on a (geographical) map, i.e. I want to show the clusters that I got after the analysis in a map. Can ...
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0answers
55 views

How do I use American Community Survey income estimates and standard errors in an error-in-variables model?

Income distributions tend to be highly skewed. Yet the American Community Survey (ACS) provides only two summary statistics for its median income estimates in small areas: the mean estimate and a ...
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1answer
45 views

Should I perform paired t-test or not?

I have the following human population data with me (based on a census) - Number of women in each educational level (like Illiterate, literate but less than primary, high school, graduate). For the ...
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0answers
478 views

Statistics for ordinal data

I have some ordinal data based on a population survey. My $X-axis$ consist of age groups $(<15 , 15-19, 20-24 . . . , 45-49$ years$)$ . On the $Y-axis$, I have proportion of certain population. And ...
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50 views

My fertility simulation is not matching reality

Using data from US vital statistics I created a simulation that was based on the number of children a woman has over her lifetime as follows (out of 10000): ...
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1answer
53 views

How to model demographics

I tried assuming the number of children a woman has is a Poisson distribution. So, for the US where the mean number of children per woman is currently 1.87, it yields a probability mass function like ...
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1answer
852 views

Formula for Cohort Fertility Rate

I understand the definition of Cohort Fertility Rate as the average number of live births that a woman born in a particular year has had by the end of her reproductive life. But is there a formula to ...
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1answer
511 views

Comparing Crude Death rate of two population

As we all know that the formula for crude death rate is $$CDR = \frac{D}{P} \times 1000$$ where $D$ is the totla number of deaths(during a calender year) among residents of a community and $P$ is the ...
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1answer
1k views

What are the best method for presenting demographic data?

I have a large dataset of people, and connected demographic data, like age, gender and place of residence. I want to present a typical person from this dataset, as a presentation technique. Should I ...
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0answers
17 views

UK population and NHS spending projections

Say I want to make some projection about the size of the UK population 25 years from now and consider the impact of this population growth on national health spending. Is the following approach ...
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0answers
127 views

What testing method can be used with demographic data to compensate for possible non-response bias?

(Hello CrossValidated, first poster here, so please have mercy with any transgressions of mine!) For my thesis, I am currently researching the correlation between stance to organizational change and ...
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1answer
59 views

How to find 5-year survival probability of newborns from a life table?

I was trying to learn cohort component method for population projection from this link of the webpage of Measure Evaluation. To project the population forward using cohort component method, when the ...
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0answers
58 views

Estimating incidence and prevalence from demographic data

I'm interested in estimating incidence and prevalence of specific diseases in the USA based on the NAMCS data set. However, the data set only records patient/prevalence visits - there is no way of ...
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2answers
485 views

How can I assess many explanatory variables with a sample small enough for in-depth qualitative (case-study) analysis?

The problem: My study is on the impact of human factor on regional development. My “subjects” are regions of the European Union. 276 exist in total under NUTS 2 classification. The idea is to use a ...
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1answer
56 views

Sample size for entire population to determine sub population?

Let's say a bus company has 500 markets with an average of 10000 passengers each day but some markets as large as 100000 and some as small as 300. How would I determine the simple random sample size ...
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0answers
82 views

Need help to understand the equation of stable population

I was reading this paper on non-stable and stable population momentum. There the authors have shown the formula for stable population $Q$ as: $$Q=\dfrac{\int_0^\beta n(x)v(x)dx}{bA_r},$$ $v(x)$ is ...
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1answer
198 views

Can age,education level and socioeconomic status be controlled but not as covariates to strengthen an experimental study?

Most ppl include age, education level and socioeconomic status in their demographics just to show their sample of study. But in my case all those 3 factors are predictors of my DV which is prosocial ...
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0answers
264 views

Extracting meaningful demographic data from ordinal / Likert responses in SPSS

I'm currently working on the findings of my Masters dissertation where I've defined hypotheses, created a questionnaire, and then testing whether a relationship exists between different ordinal ...
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1answer
84 views

Independence of sexes of children born to a couple

Suppose $100p\%$ of babies born are male. Sometimes one reads that $p\approx 0.505$ or something like that. If a couple has $n$ children, it is often assumed that the sex of each child is ...
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1answer
141 views

How can assumptions on TFR and life expectancy at birth be used in population projection?

I was reading a report on population projection using cohort component method. There the authors have only stated their assumptions regarding the TFR (total fertility rate) and life expectancy at ...
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0answers
44 views

Bhattacharyya Distance for Age/Gender Groups?

I'm calculating distances for groups based on Age/Gender Compositions (to rank their similarity in demographic composition.) I'm working with the following: Men 18-34, Men 35-49, Men 50-64, Men 65+, ...
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2answers
182 views

US Population Hypothesis Test

I’m hoping someone can give me some tips on the test I have in mind for my data. I have data which is samples of Americans from various zip codes throughout the US. In my data I assume if someone has ...