Posts

Please find a collection of news and ramblings below

Inaugural lecture professorship data quality

On 2 april 2026 I delivered my inaugural speech as professor data quality at the dept. of Methods and Statistics . The inaugural …

Slides General Online Research conference keynote

Promotion to full professor data quality

A bit of personal news: I have recently changed jobs. I am actually still doing the same thing as before: The people at Utrecht …

Switching from face-to-face to self-interviewing. The problem of mode effects

One of the major problems in estimating the mode measurement effect in (mixed-mode) surveys is that isolation of the causal effect of …

Vacancy for assistant professor

Are you passionate about data quality? Are you an expert on survey methods, data collection and analysis? We have an opening for …

Vacancy for Phd student

Are you interested in surveys, official statistics, apps, and sensors and do you have the ambition to contribute to scientific progress …

Push-to-web and the role of incentives

With Vera Toepoel , and people at NIDI and the German Institiute for Demographic Research we have in 2018 conducted a large experiment …

new website

Dear all, Nine years ago I started blogging. I have been quiet the last few years when it comes to blogging. Perhaps I will pick this …

Which survey error source is larger: measurement or nonresponse?

As a survey methodologist I get paid to develop survey methods that generaly minimize survey errors, and advise people on how to field …

Mobile-only web survey respondents

My breaks between posts are getting longer and longer. Sorry my dear readers. Today, I am writing about research done over a year ago …