# Tagged Questions

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

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### How to help people understand “…per 100,000”?

It's well known that members of the public have difficulty comprehending numbers over a certain size. A common tricky issue for people communicating demographic trends is helping people make sense of ...
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### Estimating demographics from internet activity

I'm looking for research papers on estimating demographic information (age, wealth, location, gender etc.) out of internet activities (preferably social network activity or browser history). Where ...
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### Residual from Functional Demographic model for fertility

I'm trying to fit a functional demographic model (fdm) to fertility rates using the demography package in R. When I've plotted ...
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### Does it make sense to impute year of birth?

This is data cleaning and preparation stage question for me. I apologize if the question is basic, but I am a beginner. I have a dataset of a bit less than 4500 records. This is a survey and ...
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### Is there a population size limit for using the R package Demography when doing stochastic population forecasting

Is it possible to do stochastic population forecasting with the R package Demography when the population size is between 10k and 20k? I have data from year 1985 to 2012 for population, deaths and ...
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### 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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### 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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### Measuring change of participation level in a population after a policy change

I would like to measure the change of a policy in a community, that is, check whether there was a change after the new policy was applied. The old policy required that people had to give away a right ...
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### What statistical measures are recommended for mixing of population samples?

I want to know what statistics should be used to measure the mixing of languages in cities in a country/state. I have samples from individuals and know the language they speak and the city they live ...
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### Measuring representativeness of a (non-random) selection

I am looking for a numerical value that expresses how representative a (non-random in this case) sample from a population is regarding the distribution of a certain attribute. Take for example, the ...
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### 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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### 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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### 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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### 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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### 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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### 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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### 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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### 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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### 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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### 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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### Probability of moving house (non-independence problem)

We are analyzing a dataset where we are looking at the probability of individuals moving house, and the factors that predict moving. The problem is that a lot of people are married, and (usually) if ...
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### Calculating life expectancy in Stata

I've been looking for resources on calculation of life expectancy uising Stata. Combing Google results so far I've only been able to locate this module: LXPCT_2: Stata module to calculate ...
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### Population Projection, Forecast, Prediction

I am frequently reading some terminology But not understanding their difference . Those are : $\bullet$Difference between ...
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### 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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### 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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### What is the reason for getting so many ”Warnings: NAs produced” while using the function ”pop.sim” in the ”demography” package

When so many warnings, what does it in fact means? Is there a problem with the validity of the stochastic forecasting models? I am doing a stochastic forecasting of a small population with approx. 50....
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### Family relationships and random assignments [migrated]

Suppose I deliver a special note to 2% of a population at random. What is the probability that such note has been delivered : parent and child cousin and cousin Assume a birth rate with a mean of ...
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### Probability of surviving up to an age from birth using life table

We sometimes need to know the probability of surviving up to a certain age interval from life tables. We usually find it by $P_{0->[x,x+n]}={}_nL_x/(5*l_0)$. This is not the survival ratio, but the ...
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### 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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### Difference between auto.arima() and forecast() function

I am trying to fit mortality data to best ARIMA model. What is the difference between function forecast.lca and auto.arima when choosing a model to fit. forecast.lca also includes random walk, but is ...
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### Getting started with age demographic projection

I am trying to project the future age distribution of a population within an organization using (raw) data about the current distribution, as well as past data about entries and exits per age cohort. ...
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### 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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### How to get stable and life table stationary populations and derive different quantities needed to calculate population momentum?

I was reading an article on population momentum. They have calculated the proportionate age distributions, the mean and variance age of childbearing, the growth rates, birth rates and expectation of ...
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### How to combine distributions of inter-connected variables?

Can anyone point me to how I could combine distributions when there's a relationship between the variables? I apologize in advance if this is too basic or if I'm not posing the question perfectly. I ...
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### 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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### 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 ...