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.
275
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15
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How do I construct an analysis on the following question in applied financial econometrics?
I want to know how to make a thorough analysis by comparing the following regression outputs. The regressions are estimated using the Arbitrage Pricing Theory (APT) with the second one testing for ...
2
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31
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AIC Calculation
Our object is calculating AIC, and we are unsure whether we can use our measure below when calculating AIC. The following are the data from the experiments and our method to calculate the information ...
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2
answers
163
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Ratio of two Jensen inequality
I have these pair of numbers
$ (a, b) = (\frac{4}{9}, \frac{1}{9}) $ and $(c, d) = (\frac{1}{2}, \frac{1}{6}) $. (Number mean nothing, just for illustration and simplification)
Note that - (a, b) are ...
- 499
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1
answer
41
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US population growth: "natural increase" vs "fertility rate"
Based on the 2017 US Census population projections through 2060, specifically table 1 (Projected population size and births, deaths, and migration), the "natural increase," which is US ...
- 131
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1
answer
64
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Show withdraw funds from trading account in Google Sheets
I am tracking my portfolio in Google Sheets. I have columns like daily NLV, % and value change etc. This stats are used to calculate some extra data and draw performance charts.
Now, I want to ...
0
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1
answer
33
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Am I calculating the Gini coefficient correctly?
I calculated the Gini coefficient through a statistical program (MATLAB), and it came out much larger than I expected. I think I got the Gini coefficient formula right, but I don't know where I went ...
- 13
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21
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How to handle missing median and mean values for a panel dataset when a full subdivison is observed?
I am creating a panel dataset for earnings based on English local authorities (local administrative districts). In 2009 and 2019, some local authorities were combined to create a single local ...
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25
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Vector Visualisation of regression model vs scatter plot style
I wrote another post discussing the intuition of visualising OLS regression.
I wanted to go a bit deeper here visualising the difference between a vector/matrix approach, and the non-linear algebra ...
- 897
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47
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Intuition of Linear Algebra visualisation for regression
Question: I want to clarify my understanding of the basics of OLS regression in matrix form.
Let's assume we have 2 different independent variables $x_1$ and $x_2$.
Our 'model' will be the plane that ...
- 897
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12
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Including Controls for Relevance Test in First Stage Regression of IV?
I am conducting an instrumental variable approach (IV) in my paper, and I am puzzled how to correctly test for the relevance / strength of the instrument assumption.
I recently read in a paper by ...
- 11
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39
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Errors in variable, statistics/econometrics, measurement error
I didn't understand the deduction involving Plim. Why do the Plim of the terms on the left translate as variance in the first two cases?
here is the continuation of the print. were i have the question
4
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1
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199
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Deriving an equation in Banerjee "A Simple Model of Herd Behavior" (1992)
I am reading "A Simple Model of Herd Behavior" by Banerjee (1992). A short summary of the model is the following.
There is a probability $\alpha$ that each person receives a signal telling ...
- 45
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55
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Econometrics especially with regard to OLS estimators!
I am solving a problem below and also having a hard time. Could you give me a help me with it?
Which of the following can cause OLS estimators to be biased? Which of the following do not cause the ...
1
vote
1
answer
37
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Is there a way to assess land value independently of zoning policy?
I am aware that the methods used to assess land value of properties, used by government agencies for taxation, are affected by zoning restrictions. Restrictions on how a lot of land may be used by it'...
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1
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49
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Which sample size would be best to investigate effects of War in Ukraine on volatility of stock prices using GARCH models?
I am planning to investigate the effect of the war in Ukraine on the stock market prices by including in a GARCH model a dummy identifying the burst of the war.
I am wondering if I should strictly use ...
- 21
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18
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Ex post predictability of "mps" in Bauer, Swanson (2022)
I am reading the paper "A Reassessment of Monetary Policy Surprises and High-Frequency Identification" by Bauer and Swanson (2022). In Section 2, there is a Bayesian updating model that goes ...
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1
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43
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What is the difference between fixed effect regression and (panel) fixed effect regression?
What's the difference between fixed effect regression and (panel) fixed effect regression?
- 178
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16
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Why is my growth rate changing after changing base year for inflation?
I had the following problem: a client of mine calculated income growth rates using 2017 as base year for inflation, except for the 2015-2020 growth indicator, where they used 2020 as base year. Wanted ...
- 101
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9
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Percentage Increase Where Base is Weighted
I recently asked my Mathematics Professor this question and he told me that it's more of an economical/psychological question than a mathematics question. Here is the question:
Lets say there are ...
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51
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Statistics in Economics
In the following diagram, a table in which we are supposed to calculate the mode. My question is in the answer the mode was found by grouping method. Why do we use this in such cases, can’t we just ...
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17
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How to input AGE and INCOME group data from survey questionnaire into STATA
On a survey that respondents completed, I have income and age grouped into bands such as for AGE:
-18-24
-25-34
-35-44
-45-54
-55-64
-65-74
-Above 75
-Prefer not to say
I realize these are ...
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7
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Where can I find statistics about coworking enterprises contribution to GDP?
I ask this as information for a layman.
I don't know how are they aggregated in the data of the GDP of each country.
Also, I'm not sure if government has them really available as coworking or private ...
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15
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Total Retention Rate Calculated from Categories
I am calculating retention for 3 categories and then total, and I am trying to double check my total, but my check formula isn't working.
I am comparing the last 14 days (let's call it Period 1) to ...
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1
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CALCULATING REVENUES OF EACH PRODUCT IN RSTUDIO [closed]
Hello everyone,
I need to work with the data presented above. This question involves a little bit of knowledge of Rstudio, but I assume some of us work with this programming language throughout our ...
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1
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176
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What is the difference between econometrics and statistics?
Is econometrics just statistics applied to economics or is there also some deeper difference?
- 508
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1
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203
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How to prove that Adjusted R^2 is less than R^2
The adjusted R^2 formula is :
$$ \overline{R}^{2}=1-\left( \left( 1-R^{2}\right) \cdot
> \dfrac{n-1}{n-k}\right) $$
In case of k > 1 , I continue like that;
$$ \overline{R}^{2}=1-\left(
\...
- 121
1
vote
1
answer
26
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How to get Customs data for importing companies?
I am looking for customs data for importing companies for each country.
I found some of them, for instance Canadian Importers Database
But I wonder if any of you know the additional free sources. ...
- 11
0
votes
1
answer
48
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How to find the share price with respect to the type of share?
As someone coming from a mathematical background who has started reading into some basic finance, there are a few concepts that I am struggling to understand and would be grateful if I could check to ...
- 105
0
votes
1
answer
220
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Demonstrate order and rank conditions for identification with instrumental variables
For an equation in a simultaneous system to be identified two conditions must hold: i) the order condition, and ii) the rank condition.
b_IV=(Z'X)^(-1) Z'Y
How to demonstrate in matrix form that both ...
- 1
2
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1
answer
140
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Expected Value / Econometrics
I would like to learn how the expression below is 1. Without understanding it I am having trouble to go on with Chebbyshev's Inequality. It's maybe too basic, but I appreciate any help.
- 77
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157
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Consistency of an estimator
Is it consistent? How can we derive whether an estimator of the parameter is consistent or not?
- 77
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1
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89
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Variance of a random variable / Econometrics
Could someone help me to derive/understand how we can derive $E[X^2]-E[X]^2$ from
$E[(X-E(X))^2]$ in the variance formula of a random variable $X$?
I am writing the formula below:
$Var(X)=E[(X-E(X))^2]...
- 77
1
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0
answers
66
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Fixed effect model: different estimation approaches with R - how to demean variables - unbalanced panel
I want to use R to estimate a fixed effects model using different estimation approaches (e.g. replicating xtreg from Stata). Note that I am using an unbalanced panel.
The easiest way to do this is ...
- 11
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1
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547
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Why the subjective "Owners’ equivalent rent of residences" is included in the CPI?
I was reading about the calculation of the Shelter index of the CPI which accounts to more than 30% of the entire basket. It consists mainly of two parts: (1) Rent of primary residence, and (2) Owners’...
- 283
2
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1
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59
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Is debt to GDP ratio a misleading statistic to show the level of indebtedness of a government?
The Debt to GDP ratio is a very popular statics to show the level of indebtedness of a government, so much that is even used in the Euro convergence criteria.
However its use seems misleading to me, ...
- 164
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1
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28
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OLS with multiple indicator variables
My dataset contains two numerical variables (n1, n2) and six indicator variables. The first three indicator variables specify ...
- 125
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33
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Intuition Behind Difference-in-Differences with Continuous Treatment?
It's very clear to me how a difference-in-difference model works when there is a binary treatment. If the model is $y_{i,t}=\beta_{0}+\beta_{1}P_{t}+\beta_{2}T_{i}+\beta_{3}(P_{t}*T_{t})+u_{i,t}$ ...
- 51
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26
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Using the 80:20 rule, what top 20% of economic concepts, theories, methods, tests, tools etc do you use to generate 80% of your results?
I'm curious to see what different economists use in their roles. Helpful if you could specify your area of work/interest too.
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15
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How to detect verion of HS 6 digits code?
I have trade data with HS 6 digits codes. However, I don't know which version of HS is used.
I wonder if there is any practice in statistics to detect which version (HS1, HS2...HS5) is used?
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15
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How to convert national poverty into an international comparable measure?
I want to compare the poverty of a subpopulation of my country (indigenous people) to other countries' poverty. To do that, I have the per capita income of each individual of my dataset expressed in ...
1
vote
1
answer
84
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Interpretation of regression output for different models
I am quite new to econometrics, hence, not very familiar with interpreting regression outputs. To me, the resources I've found online are quite confusing and cannot give me some practical guidance in ...
- 93
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votes
1
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32
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Adding a subscripts for P (price) in equation
I made the following equation for a hedonic model. When I sent it to my teacher to check if it was fine, she told me that I should add subscripts for P so that we know by what it varies. I don't get ...
- 25
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39
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Sample size invariance of inequality measures
I am not an expert on inequality, so decided to drop this question. Suppose I analyze inequality of an outcome among different groups with Gini coefficient, I know that the scale of the outcome wouldn'...
- 171
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114
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WLS or Feasible GLS?
For a question like this, would I use WLS or Feasible GLS? I am leaning towards WLS but my lecture slides tell me GLS is used when there is more than one variable that drives the residual variance.
- 21
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1
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217
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Functional form for regression in a hedonic pricing model
I am doing a regression where I use the hedonic pricing model. Hedonic pricing treats a marketed good, usually a house, as a sum of individual goods (characteristics or attributes) that cannot be sold ...
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-3
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1
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188
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consistency and unbiasedness of ols estimator
Please explain why the OLS estimator is consistent and unbiased withregard to the equation below
\begin{equation} \label{eq:1}
C_{t} = \beta_{1} + \lambda C_{t-1} + \epsilon_{t}
\end{equation}
0
votes
1
answer
53
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error specification of OLS regression models
Consider the following regression equation * \begin{equation} \label{eq:1}
C_{t} = \beta_{1} + \lambda C_{t-1} + \epsilon_{t}
\end{equation}
and let \begin{equation} \label{eq:3}
\epsilon_{t} = \rho\...
1
vote
1
answer
47
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lagged regression equation properties
consider this equation 1: \begin{equation} \label{eq:1}
C_{t} = \beta_{1} + \lambda C_{t-1} + \epsilon_{t}
\end{equation}
If the error term is independently and identically distributed (iid) with ...
3
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1
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154
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Difference between M-estimators and Minimum Distance estimators
I was reading Chapter 22 of Hansen's Econometrics on M-estimators and he lists OLS, Non-linear LS and Maximum Likelihood as examples of M estimators. After a few paragraphs, he also writes "[...] ...
1
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0
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38
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Wald Statistic with heteroskedasticity on asymptotic inference vs exact inference
I was working on the following proof but I got stuck.
I'm trying to show that the next equality holds:
$$(X'X)^{-1}X'\mathbb{E}_n[\varepsilon\varepsilon']X(X'X)^{-1} = \mathbb{E}_n[XX']^{-1}\mathbb{E}...
