Skip to main content
Mathematics
Hirek's user avatar
Hirek's user avatar
Hirek's user avatar
Hirek
  • Member for 10 years, 3 months
  • Last seen more than 2 years ago
Profile Activity
Stats
467
reputation
12k
reached
1
answer
22
questions
Communities
View all
About

I am a graduate student in Econometrics, mainly focusing on weak instrumental variables and inference under weak identification.

Badges
View all badges
This user doesn’t have any gold badges yet.
3
silver badges
12
bronze badges
Top tags
View all tags
0
Score
10
Posts
43
Posts %
0
Score
7
Posts
30
Posts %
0
Score
4
Posts
17
Posts %
0
Score
3
Posts
13
Posts %
0
Score
2
Posts
9
Posts %
0
Score
2
Posts
9
Posts %
Top posts
View all questions and answers
question
4
How to express a hypergeometric confluent function in the pFq form?
Sep 1, 2014
question
4
General formula for $\det(A+I)$ where I is identity. Worked it out for $2 \times 2$ and $3 \times 3$.
Sep 18, 2014
question
4
Why does this expression for the minimum eigenvalue work?
Sep 30, 2014
question
4
When does the singular value decomposition fail?
Jan 25, 2015
question
4
A fluke or deep reason for this nice result: rigorously identify derivative from algebraic perturbation
Apr 7, 2022
question
3
Eigenvalues of a Product of two matrices A and B inside trace operator expressed in terms of any eigenvalue of A or B?
Jan 29, 2015
question
2
Is there a better notation for difference equations?
Jun 9, 2014
question
2
If $X \geq X_t$ why is $\frac{X}{(1+|X|)} \geq \frac{X_t}{(1+|X_t|)}$? So a monotone, 1-1 transformation doesn't affect the inequality?
Sep 4, 2015
question
2
Circular logic in set definition - Tautology?
Sep 21, 2016
question
2
Good introduction to NCP and free probability
Jul 8, 2022
Top network posts
View all network posts
22
What is the difference between conditioning on regressors vs. treating them as fixed?
10
Class declaring itself (*this) private to avoid race conditions / quest for threadprivate in gcc abandoned
9
Distribution of sum of squares of normals that have mean zero but not variance one?
8
Good C++ optimization library for BFGS
7
When bibtex does not find bibdata inside aux file, with code