Dr Koen Jochmans: all content

Showing 1 – 10 of 10 results

Working paper graphic

Inference on a distribution from noisy draws

Working Paper

We consider a situation where the distribution of a random variable is being estimated by the empirical distribution of noisy measurements of that variable.

7 December 2021

Journal graphic

Fixed‐Effect Regressions on Network Data

Journal article

This paper considers inference on fixed effects in a linear regression model estimated from network data. An important special case of our setup is the two‐way regression model. This is a workhorse technique in the analysis of matched data sets, such as employer–employee or student–teacher panel data.

30 September 2019

Working paper graphic

Inference on a distribution from noisy draws

Working Paper

We consider a situation where the distribution of a random variable is being estimated by the empirical distribution of noisy measurements of that variable.

13 September 2019

Working paper graphic

Fixed-effect regressions on network data

Working Paper

This paper studies inference on fixed effects in a linear regression model estimated from network data. An important special case of our setup is the two-way regression model, which is a workhorse method in the analysis of matched data sets. Networks are typically quite sparse and it is difficult to see how the data carry information about certain parameters. We derive bounds on the variance of the fixed-effect estimator that uncover the importance of the structure of the network. These bounds depend on the smallest non-zero eigenvalue of the (normalized) Laplacian of the network and on the degree structure of the network. The Laplacian is a matrix that describes the network and its smallest non-zero eigenvalue is a measure of connectivity, with smaller values indicating less-connected networks. These bounds yield conditions for consistent estimation and convergence rates, and allow to evaluate the accuracy of first-order approximations to the variance of the fixed-effect estimator. The bounds are also used to assess the bias and variance of estimators of moments of the fixed effects.

30 May 2017

Working paper graphic

Fixed-effect regressions on network data

Working Paper

This paper studies inference on fixed effects in a linear regression model estimated from network data. We derive bounds on the variance of the fixed-effect estimator that uncover the importance of the smallest non-zero eigenvalue of the (normalized) Laplacian of the network and of the degree structure of the network. The eigenvalue is a measure of connectivity, with smaller values indicating less-connected networks. These bounds yield conditions for consistent estimation and convergence rates, and allow to evaluate the accuracy of first-order approximations to the variance of the fixed-effect estimator.

8 August 2016