# Tagged Questions

Cross section data is drawn at a single point in time as a sample of many different units from a certain population.

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### Is this a case control or a retrospective cohort study? What are the biases? [on hold]

BACKGROUND: Black Americans have higher mortality from breast cancer than white Americans. This study explores the influence of socioeconomic factors and black race on treatment and mortality for ...
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### How do I calculate sample size and What is the is the meaning of power in a cross-sectional study?

Here is an example: Previous research reported that the prevalence of HIV testing among gays is 19.2% . Sample size required to detect this percentage with 95% confidence and .05 precision is 273 (...
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### Understanding a paper combining cross section with time series in finance

I am reading a paper to do with reversal signals in finance. (Apologies I am not allowed to share the actual paper.) In the paper it says it does monthly cross sectional regressions and collects the ...
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### Cross-Section Analysis

I have cross-section individual data and would like to regress individuals' 2011 wages (in logarithm) on the region-varying minimum wage (MW). The MW variable will be subject to endogeneity (e.g. ...
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### fixed effect approach for multilevel data

I am doing a multilevel analysis with the first wave of ESS survey (2002). First, I ran a multilevel analysis (for both my two research focus). After that, I have to run a fixed effects model to check ...
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### Cross-sectional independence tests returning p-value NA

I'm a Master student researching for his thesis. In a panel data analysis, I have a sample of 141 observations related to airports. First lines are: ...
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### Questions about 2sls regression with skewed cross-sectional data

I have cross-sectional data (independent variables in period t, dependent variables in period t+1).They are highly skewed.And I want to do 2SLS regression. Thus far I've read many materials about 2SLS,...
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### What is an acceptable R squared range for cross sectional data linear regressions?

May I know an acceptable R squared range for a cross sectional data analysis using linear regression? I think the requirement for this is lower than time series or panel data but would like to know ...
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### a high correlation coefficient between the dependent variable and a control variable

I have an control variable which has a high correlation coefficient of 0.6985 with the dependent variable.It's cross-sectional data, what things should I concern about the high correlation coefficient ...
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### When is cross-sectional data better than panel data?

When is cross-sectional data better than panel data? That might be a weird and strange question: I personally think panel is the best choice but I still want to know if there is some expectations or ...
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### What is demeaning data & what is its purpose?

What is demeaning a data? When it should be done? Or what is its use? Is it necessary to do for a cross section survey data before use for regression analysis?
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### How to find frequency of string data on repeated cross section using STATA? [closed]

So I am looking at a dataset for auctions. I have all the bidders who won something, and how much they bid. This auction takes place every year. I wanna see if the same people come back every year to ...
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### Causal Inference from cross-sectional survey data with recall questions and associated problems

I have a dataset from a cross-sectional study (n=121) where people where asked about production characteristics in 2015 and how they recall their production in 2010. One set of example questions could ...
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### Interpretation of max and odds ratio

Please I will like to know how different or similar the interpretation of odds ratio results mad fixed effect results are. I will like to compare the result they provide
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### My regression shows zero

After running my logit model I had one of the variables showing zero.. When I run the mix I get a zero and a dash when I run the odds ratio. It looks odd to me cos I haven't come across any such ...
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### Time-Series Cross-Section or Multi Level

I trying to make a quite complicated model (for me at least) which i cannot figure out myself :/ I have a dependent variable (level of production) (and perhaps more than one - different types of ...
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### Using several cross-sectional regressions (for different years) vs. a single fixed-effects panel model

I have what I think is a relatively simple question about the merits of performing a single panel regression with fixed effects as opposed to individual yearly cross-sectional regressions with the ...
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### Analyzing repeated cross-sectional surveys

I'm planning analyses for a substance abuse prevention media campaign and the funder is interested in looking at change over time in perceptions and attitudes towards drug use. We will take a sample ...
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### Regression models with several samples of the same people

I am trying to implement some regression models with my data of 56 features x 1500 samples to fit a response variable of 1x1500 and I am hesitating about the statistical validity of what I am trying ...
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### Analysis for panel data

I have data by year, variables, and Metropolitan Statistical Area (MSA) for the state of Pennsylvania for the following variables for years 2000-2014: y = birthrate of firm/population of MSA x1 =...
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### Simple cross-tabulated data and probability

I saw this question which I found confusing: Suppose 400 people are surveyed. For each person, they flip a coin and if it lands heads they are asked, A: Are you a student? otherwise they are ...
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### difference in difference cross section or panel

Hello so i am doing some econometric on inflation targeting. What do you recommend I use if I am doing difference in difference with CPI quarterly: the method of collecting data on should it be cross ...
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### cross-sectional data : regression model

I'm using a cross-sectional dataset ( just one point in time) and want to use a regression. In literature, mostly an OLS regression or a regression with fixed or random effects were used. However, I ...
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### Logistic fixed-effects model with group-dummies

I have cross-sectional data with ~800 individuals nested within 6 countries, across 3 time points. Each individual is sampled only once, so time is cross-sectional here too. The number of individuals ...
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### DiD Matching with Time-Varying Treatment and Repeated Cross Sectional Data

I am conducting research on the effect of modularizationg (dividing courses in modules) on early school leaving (dummy variable where 1 = left school prematurely). I would like to match my treatment ...
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### second genration panel unit root tests

I'm conducting panel data analysis in Eviews-9 Fistly, I have obtained the result that the data in my study is cross-sectionally dependent. (there exists cross-section dependence) Therefore, I ...
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### How to implement a two-level beta regression?

I am working with Time-series Cross-section data and my response variable is a proportion ranging from 0 to 1 (including 0 values but no 1s observed). Beta regressions, and especially the ...
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### statistical tests for case-control studies on malnutrition

I got some data containing sociodemographic information (e.g. Age, level of education, BMI, type of employment) about mothers of malnourished and well-nourished children. I am trying to design it as a ...
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### What level should I cluster at in my regression?

So I am running a pooled OLS. My dependent variable is house prices, and my main explanatory variables are job creation and distance to job creation, plus a raft of control variables. The housing ...
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### Structuring data for ticket sale analysis

I have some experience doing statistical analysis but most of it has been practiced using data formatted specifically for that type of regression/analysis. I now have my own data set but I'm at a loss ...
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### Statistical differences between longitudinal and cross-sectional data

I would like to start a follow-up discussion to an existing question on cross-validated: Difference between longitudinal design and time series. Most of the answers there tend to make distinctions ...
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### Is serial and cross-sectional correlation a problem for random forest?

I apply random forest on panel data (many countries over many years). I was wondering whether serial correlation (i.e. the value of a time series depends on its value in previous periods) and cross-...
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### Separate-Sample versus Pooled-Sample Estimation of Interactive Effects

I have a question regards pros and cons for Separate-Sample versus Pooled-Sample Estimation of Interactive Effects, when alayzing group differences. For instance, I am interested in the effect of a ...
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### In linear regression, what is the difference between controlling for a random variable and standardizing the DV by that random variable?

I am working on a project where my dependent variable is the number of violent events in a given city. It is obvious that cities that are highly populated are going to have a higher number of these ...
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### Modeling repeated measures of cross-sectional county level data

I'm currently preparing an analysis project and am wondering people's thoughts on how to best model these data. I have 8 waves of data from a statewide random sample of 6, 8, 10, & 12 graders that ...
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### How should I interpret the results of these two models?

I have a panel data set with two time points: t and t+10. I first ran cross-sectional models for data at t and t+10 separately Y = a + bX b is statistically significant in both models, indicating X ...
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### Variables for Local Economic Environment

I'm working on a regression to explain store sales (cross section data over a number of stores in one time frame only). Some of my variables are 'min distance to competitor x'. However, the results ...
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### Time-series cross-sectional classification problem

I have a time-series cross-sectional dataset consisting of 100 individuals that each had 4 features measured yearly for 21 consecutive years. One of the features is binary and the other three are ...
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### Assessing dependencies

I am looking for a method to assess the dependencies between random variables (cross sectional data). I know that I can use copulas models, but I'd like to see if there are any other alternatives.
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### Test whether cross-sectional dependence in panel data follows known (network/spatial) structure

I want to test whether cross-sectional dependence in one specific variable (y) in panel data format follows a known structure (W) (e.g. network, spatial dependence), after controlling for individual ...
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### Causal inference from Cross sectional study

As far I know that, causal inference can make for longitudinal study. Is their anyway way to make causal inference from cross sectional study design? If yes, how can I do this? Please share if any ...
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### Interpreting OLS Cross-Sectional Macro Data

I have the following model: $y=a_0+a_1(x_1/z_1)+a_2(x_2)+e$, where $y$ = the average log of variable y, $x_1$ = the average ratio of $x_1/z_1$, $x_2$ = is the averae log of the variable $x_2$. ...
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### Analyzing Independently Pooled Cross Sectional data (TIme series)

I am new with time-series data analysis. It seems that there is some confusion in terminology (Panel, and time-series cross-sectional). But my question is general in nature. How do I analyze a ...
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### can individuals resampled in reoccurring cross section surveys be considered as panel dataset?

I have data from a reoccurring cross sectional firm survey, For every year a new sample was selected ( with replacement between years). The data is identified, so I can see the subset of firms appear ...
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### Is there any difference between pooled cross section and pseudo panel data?

I have a 17 years (1997 - 2014) of data from independents surveys. It's a large dataset (with around 1.2 million observations), which I'm using to measure the effect of distance on unemployment length....
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### What to call exponentiated coefficients from a Poisson/negative binomial regression of cross-sectional data

In epidemiology, exponentiated coefficients are often reported as odds ratios, relative risks/ incidence rate ratios or hazard ratios. In the analysis of cross-sectional data using Poisson/negative ...
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### Avoiding spurious regression with cross-sectional data

I have been reading everything I can get my hands on about spurious regression but can't seem to definitively find out what is best in regressing cross-sectional data including non-stationary ...
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### type of study and sample size

I'm a medical student and for my thesis I'll study some features of the retina in patients in neurodegenerative disorders (Parkinson, Alzheimer) compared with controls. We are not going to make a ...