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Elias
  • Member for 5 years, 8 months
  • Last seen more than a week ago
530 votes
23 answers
286k views

Why square the difference instead of taking the absolute value in standard deviation?

  • 5,545
188 votes
9 answers
717k views

How to summarize data by group in R? [closed]

92 votes
10 answers
386k views

Is there a minimum sample size required for the t-test to be valid?

77 votes
10 answers
11k views

What are the major philosophical, methodological, and terminological differences between econometrics and other statistical fields?

73 votes
10 answers
1.1m views

What is the difference between discrete data and continuous data?

  • 881
71 votes
7 answers
91k views

What is a "saturated" model?

65 votes
14 answers
11k views

What is the most surprising characterization of the Gaussian (normal) distribution?

  • 6,345
59 votes
3 answers
6k views

Statistics and causal inference?

  • 12k
52 votes
4 answers
98k views

What is difference-in-differences?

47 votes
5 answers
103k views

What references should be cited to support using 30 as a large enough sample size?

  • 1,261
47 votes
2 answers
4k views

How well can multiple regression really "control for" covariates?

  • 3,501
45 votes
8 answers
196k views

What is the reason why we use natural logarithm (ln) rather than log to base 10 in specifying function in econometrics?

44 votes
5 answers
9k views

Is machine learning less useful for understanding causality, thus less interesting for social science?

  • 1,129
43 votes
1 answer
25k views

Proof that the coefficients in an OLS model follow a t-distribution with (n-k) degrees of freedom

  • 611
41 votes
6 answers
27k views

Testing for autocorrelation: Ljung-Box versus Breusch-Godfrey

41 votes
4 answers
15k views

What is an instrumental variable?

40 votes
4 answers
5k views

Justification of one-tailed hypothesis testing

  • 3,071
39 votes
3 answers
27k views

Why is RSS distributed chi square times n-p?

  • 20.3k
39 votes
5 answers
11k views

The meaning of "positive dependency" as a condition to use the usual method for FDR control

38 votes
4 answers
15k views

Functions of Independent Random Variables

  • 18.7k
33 votes
4 answers
12k views

Is the sum of two white noise processes necessarily a white noise?

28 votes
3 answers
41k views

How to handle ordinal categorical variable as independent variable

  • 281
27 votes
2 answers
54k views

Specifying a difference in differences model with multiple time periods

  • 385
26 votes
2 answers
11k views

Proof that F-statistic follows F-distribution

25 votes
3 answers
6k views

Representing interaction effects in directed acyclic graphs

  • 26.7k
25 votes
2 answers
5k views

Why is the null hypothesis always a point value rather than a range in hypothesis testing?

25 votes
1 answer
22k views

Incidental parameter problem

24 votes
1 answer
27k views

A proof for the stationarity of an AR(2)

  • 443
21 votes
4 answers
12k views

The proof of equivalent formulas of ridge regression

  • 1,507
21 votes
4 answers
102k views

Whats the relationship between $R^2$ and F-Test?

  • 3,579