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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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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How to standardize fertility ratio?

I would like to know how to calculate the standardized ratio of an indirect fertility ratio, the Child-Women Ratio (CWR) from samples of a population census. What I have read about, is that the ...
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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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26 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
13 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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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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17 views

Modelling births as an outcome of population diversity as opposed to population size

I wish to model and estimate the relationship between population diversity and births (or birth rates) across populations, with panel data, and I face several challenges. 1) Births, population size ...
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1answer
566 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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9 views

Quick test for significant difference in portions (and mean/average) between several group and likelihood?

I have a number of demographic and economic variables – both categorical and continuous – for a few different groups, one is a subset of the other. Estimates derive from IPUMS microdata from which I ...
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1answer
38 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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24 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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26 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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161 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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17 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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95 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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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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43 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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33 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 ...
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1answer
571 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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118 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
478 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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177 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
1k 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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47 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
44 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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439 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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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
651 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
466 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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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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126 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
58 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
51 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
423 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
51 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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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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174 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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236 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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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
114 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
40 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
174 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 ...
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2answers
574 views

Restoration of gender balance after wars - what principle underlies this?

I am wondering what is the statistical principle that underlies the following observation. After every war in history, the male population of a given region would severely decline, tipping the male/...
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3answers
386 views

Law of the Seven Degrees of Separation [closed]

I would like to know whether any empirical studies have been conducted on the so-called "Law of the Seven Degrees of Separation", a statement that any two people in the world are separated by at most ...
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Taking into account population size differences in chi-squared test

I have a group of patients who live in London. They come from the 33 London local authorities and I want to know whether there is any significant variation in where they live. In other words, I want ...
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1answer
133 views

Analysis where dependent variables are proportions

I have a set of demographic data (age, race, social class, etc.) for selected geographic areas. These independent variables are each proportional in each type, i.e. Area A: White 70%, Black 20%, Asian ...
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872 views

Population Projection, Forecast, Prediction

I am frequently reading some terminology But not understanding their difference . Those are : $\bullet$Difference between ...