# Questions tagged [econometrics]

Econometrics is the application of statistical methods to economic data for various purposes such as of testing hypotheses, infering causal relationships and forecasting future trends. Only use this tag for questions relating to the theoretical aspect of an econometric technique.

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### 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 ...
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### How to classify sample by time-variant index?

In finance paper, we have a famous index representing for law is WGI (World Governance Index). I am wondering how we classify countries by this index as this paper below. It is easy to classify based ...
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### Why standard errors in country-level variables are higher than that in firm-level variables?

From this dicussion, the commentor said Lastly, firm fixed effects may absorb more variation and likely reduced the size of their standard errors. In practice, I also mainly see that the standard ...
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### Why we need at least 40 group to be properly clustered?

From this discussion, I understand that we need at least 40 groups for clustering. For example, if we want to cluster by industry, we need at least 40 industries, or if we want to cluster by year, we ...
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### MA Representation of an AR Process - Plain English

Just wanted to ask a qualitative question in terms of the AR(1) having an infinite MA representation. Firstly, here, in reverse order: I can understand why it is important to ensure that an MA process ...
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I had wanted to ask this community for some advice on some potential methodologies I am developing. Context: I want to evaluate the effectiveness of a component of this scholarship program, which ...
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### Is clustered standard errors the best way for all regressions that uses clustered data?

Using clustered standard errors assumes that the regression coefficients are the same for all the clusters in the data, right? What if they are not the same. For example, I have used F-test to compare ...
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### What defines a data generating process

Let’s say we have a certain DGP $y=c+ax+bz+ error$. I take this to mean that conditional on the values of $x$ and $z$ in a certain instance (and no additional information )the expected value of $y$ ...
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### Which statstical method/model should I use with my study?

my dear fellows. I mainly do experimental research, so I run experiments in which participants play a game repeatedly (for 20 periods for example). The dataset I get after the experiments would be ...
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### Difference-inDifference model with Discontinued Treatment

I have a situation where I observe two groups A and B for three years. Group A never received any treatment. Whereas group B received treatment in year 2 only. I can estimate the impact of the ...
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### K-step ahead forecast of VAR(2)

I am trying to determine how to write the K-step ahead forecast of a VAR(2), with two variables, as a weighted average of its mean and last observations. I understand that one must use companion form, ...
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### Choosing a econometric model for this situation

I want to estimate the effect of adoption of a policy (POL1) by firms on their Value (Y). The adoption of POL1 is driven by self-selection. A new law forces a subgroup of firms to adopt a policy ...
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### A Special Case of Difference-in-Differences

I remember reading a paper where the Difference-in-Differences was a bit special, but I had forgotten the details. My recollection was Two time periods, specifically one time period before treatment ...
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### Is exogeneity guaranteed for a lottery-generated instrumental variable?

If using $z$ as an instrument for $x$, to study the effect $x$ has on $y$ and given that $z$ was indeed generated through a lottery, is it definite that exogeneity of $z$ will hold? I have looked at ...
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### Quarterly regression, year-fixed effects

I am trying to inspect the heterogeneous effects of a USA-based shock on a panel of countries using quarterly panel data. My variables of interest are the USA-based shock (which has only temporal ...
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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 ...
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### Quarterly GDP growth terminology: YoY vs QoQ

Quarterly GDP growth can be calculated either in terms of YoY change or — in the case of seasonally adjusted data — in terms of QoQ change. (A third option would be to annualize the QoQ rate.) To ...
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### Translog cost function [closed]

Can anyone help to estimate total cost under Translog cost function. I have input output and input cost data. It would be highly appreciated if someone can provide a software demo to estimate the same ...