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

learn more… | top users | synonyms

0
votes
0answers
17 views

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 ...
2
votes
1answer
63 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 ...
1
vote
1answer
20 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 ...
0
votes
0answers
18 views

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 ...
0
votes
1answer
19 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 ...
1
vote
0answers
9 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 ...
1
vote
0answers
47 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 ...
0
votes
0answers
34 views

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 ...
0
votes
0answers
11 views

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. ...
0
votes
1answer
29 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 ...
1
vote
0answers
25 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 ...
1
vote
2answers
116 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 ...
0
votes
1answer
19 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 ...
1
vote
0answers
26 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 ...
0
votes
0answers
53 views

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 ...
0
votes
0answers
19 views

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 ...
0
votes
1answer
25 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 ...
0
votes
0answers
82 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 ...
1
vote
0answers
58 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 ...
1
vote
1answer
36 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 ...
1
vote
0answers
25 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+, ...
0
votes
2answers
71 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 ...
-1
votes
2answers
132 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/...
2
votes
3answers
62 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 ...
0
votes
0answers
59 views

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 ...
1
vote
1answer
114 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 ...
0
votes
1answer
182 views

Population Projection, Forecast, Prediction

I am frequently reading some terminology But not understanding their difference . Those are : $\bullet$Difference between ...
3
votes
2answers
218 views

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 ...
1
vote
0answers
26 views

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 ...
0
votes
1answer
1k views

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....
3
votes
1answer
213 views

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 ...
2
votes
0answers
108 views

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 ...
4
votes
0answers
225 views

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 ...
1
vote
1answer
195 views

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 ...
4
votes
2answers
86 views

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 ...
1
vote
2answers
109 views

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 ...
5
votes
1answer
223 views

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 ...
1
vote
0answers
978 views

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 ...