# Questions tagged [statistics]

Statistics is a branch of mathematics dealing with the collection, analysis, interpretation, presentation, and organization of data. For data requests, use the [data-request] tag instead, or consider our sister site Open Data Stack Exchange.

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18 views

### Beginner's Guide to Econometrics [duplicate]

I was wondering if you could guide me to a book that I can use as a starting point for preparing myself for graduate level econometrics. I will be applying for MA programs this fall and wanted a head ...
0answers
12 views

### what is 'mid-year estimate' in following chart?

If it is mid-year population then, why it is so less in comparison to 'total population'
1answer
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### Confusion about the jack-knife

Suppose that I am trying to use the jack-knife to estimate the variance of some estimator $E$. If I have $n$ data points, I begin by computing $n$ estimates (call them $B_1$, ..., $B_n$), each ...
0answers
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### Event Study - Definition of Estimation Window (Trading Days vs Non-Trading Days)

I am currently conducting a event study for my research project on M&A. I have all data available and want to use https://www.eventstudytools.com/. But there is one clear which is not apparent to ...
0answers
55 views

### Importance of Combinatorics

I would like to know how important combinatorics is. I am an undergraduate student looking to take more math courses and I saw and intro to combinatorics as an option. The reason I am asking is ...
0answers
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### Question on the choice of boundary in the CUSUM test when we make some resampling

Question on the choice of boundary in the CUSUM test when we make some resampling We are considering to make a CUSUM test for some economical time series $𝑋=(𝑥_1,..,x_n)$. Suppose 𝑋 contains many ...
1answer
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### rebasing an index with inconsistent ratios between old and new data points?

I have a question about rebasing indices, hoping someone might be able to help. I'm working with two sets of index data for residential property prices from the Australian Bureau of Statistics. the ...
1answer
50 views

### How to interpret fixed effects?

I want to interpret the output of a fixed effects regression and need help with interpreting the country-fixed effects. The regression is the following: ...
1answer
106 views

### Does random sampling cause zero conditional mean?

In the lecture notes of my development economics class, it says that " In the regression model : Yi = β0 + β1Xi + ui, if Xi is randomly assigned, then Xi is independent of ui, i.e., E(ui|Xi) = 0, ...
2answers
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### How can anyone possibly predict how the price of anything (stocks, Bitcoin, fiat, etc.) will change without “insider knowledge”? [closed]

Other than the fact that all centralized (and thus "quick") exchanges require KYC/AML nonsense, making it impossible for me to have an account there, I've never dared to even try once to &...
1answer
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### Advice on method for analyzing the effects of increase in minimum wage

As a hobbyist and generally curious person with a lot of free time at home, I was curious what would be a good method to analyze the effect of an increase in the minimum wage of a country if you only ...
1answer
37 views

### Help interpreting standard deviation

I am looking at the 1979 cohort of the National Longitudinal Survey of Youth from the BLS. See here : https://www.bls.gov/nls/nlsy79.htm I am just having some trouble interpreting the values for ...
1answer
48 views

### Why N>T is required on system GMM estimations?

My question is why N>T is required when working with dynamic panel estimations based on system GMM, such as xtdpdsys at stata. Is that based on the potential lost of information due to orthogonal ...
1answer
51 views

### Why do we need at least as many instrumental variables as endogenous regressors to identify parameters in 2SLS?

As the title says. Why do we need at least as many instrumental variables as endogenous regressors to identify parameters?
0answers
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### Is unobserved heterogenity in mixed logit models variable specific?

I have a mixed logit model with travel cost, travel time, and mode constants. If I only randomize travel cost and keep fixed coefficients for travel time and mode constants, will the model capture ...
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### Use MLE to calculate exponential distribution parameter

The question is from A Guide to Econometrics by Peter Kennedy (5th edition, page 504.) Suppose you have a random sample of workers, from several localities, who have recently suffered, or are ...
1answer
66 views

### Interpolation of Gini Index?

Is there a conventional curve used to interpolate the Lorenz curves that model the distribution for calculating the Gini coefficient? Is it polynomial? But why? Which degree?
0answers
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### Proof of Criteria for Local Identification in Rothenberg (1971)

My question is regarding Theorem 1 (page 579) of Rothenberg (1971). It is associated with four assumptions given on the same page. But, I only have a question about a single step of the proof, so I ...
1answer
56 views

### How does explanatory variables in variance affect unconditional variance of GARCH(1,1)

I have a question about the unconditional variance of a GARCH process, where exogenous explanatory variables are included in the variance. The usual GARCH models the variance using: \sigma^2_t=\...
0answers
18 views

### World Bank and OECD statistics unmatch tax revenue as % of GDP

I have been looking for statistics on tax revenue to GDP ratio of different countries. I've found it on World Bank website. https://data.worldbank.org/indicator/GC.TAX.TOTL.GD.ZS?view=chart which ...
1answer
29 views

### Which values to assign to a quantified dummy variable

I am working on a data set from kaggle (https://www.kaggle.com/spscientist/students-performance-in-exams) about how student performance relates to some explanatory variables, such as if the school ...
1answer
79 views

### Show that conditional variance of error in linear probability model is heteroskedastic?

I have a problem that asks me the following: " Consider the linear probability model, in which we specify the regression equation to be linear in X, E(Y |X = x) = Pr(Y = 1|X = x) = x'β We can ...
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### Are there any measures of U-6 Unemployment that take into account ageing out of the work force explicitly?

Labor Force Participation has been steadily decreasing over the last 20 years or so. The Fed says that this has been the case mostly due to the demographic shifts, and to an extent the data backs that ...
2answers
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### How to find $\phi$, that denotes the correlation of signals among informed traders?

Since I do not have an answer on Quantitative Finance in my question I cross-post here the problem to tag some other categories The following assumptions are part of the paper of Back, Chao and ...
2answers
91 views

### How to average CDFs of one variable across years

I have wealth-to-income data for 10 years. I computed the cdf of this variable in each year. Now I'm trying to average the cdfs across years. In each each, the number of observations is different. ...
0answers
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### Intuitive/Practical meaning of non-stationarity of GDP Data

As i just read in a time series book that a particular GDP data under consideration is non-stationary verified through various tests. From non-stationarity definition this means that the process has ...
3answers
122 views

### What is the correct way of calculating the “average” price based on the “Open,High,Low,Close” daily trade fields?

Open,High,Low,Close I have these fields, representing the "opening" amount, the highest for the day, the lowest for the day, and what it closed at. I'm trying to determine the "average&...
1answer
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### Estimate unobservable $X_t$ with observable estimation {$Y_t$}, where $Y_t= X_t+\delta e_t$

Suppose there are measurement values {$Y_t, Y_{t-1},..., Y_0$} which come from the relationship $Y_t= X_t+\delta e_t$, where $\delta$ is a known constant, $e_t\sim N(0,\sigma^2_e)$ is a Gaussian ...
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1answer
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### Deflate level and flow variables using PPI and CPI

What do statements like Flow variables (such as dividend growth and returns) are deflated using the CPI index. or Level variables are deflated using the Producer Price Index (PPI). mean? What are ...
1answer
51 views

### How to interpret this regression coefficient?

I am performing a simple single variate regression on the variables crime rate (denoted by crrate) and the probability of getting arrested (denoted by prarrest). To be precise, the variables are ...
2answers
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### How do I predict Macroeconomic indicators?Or are there any free resources where I can get the predicted values?

I am building a time series forecasting model in which I am considering the macroeconomic indicators as predictors.I wanted to ask 2 things How do I get the future values?I have seen trading ...
2answers
778 views

### Do circular invoices count in GDP?

I'm trying to understand GDP and what it means. Say that there are two US software companies, Foo Inc and Bar Inc. Foo Inc produces software and charges Bar \\$1 million for its usage, while Bar Inc ...
2answers
83 views

### How to approach rigorous probability theory from an economics background?

I am attempting to read around the theory of probability theory from the ground up, coming from a background of economics I have little experience in set/measure theory, whilst I am not new to ...
1answer
28 views

### markov-switching model and stationarity [closed]

To test the structural breaks and to perform markov-switching model in time series data, should i have stationary data. Thank you in advance.
2answers
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### Stationarity of cyclical economic data

I'm having trouble understanding how macroeconomic or industry data could be made stationary if there's only a limited length of time series available (e.g. 2012-2019) and I have a time series that ...