We had the privilege to write a book review with Jon Jackson and Ben Bradford on Tank Waddington’s final book, co-authored with Kate Williams, Martin Wright, and Tim Newburn. There is no point for me to reiterate all the praise that we have given to this methodologically innovative and theoretically rich book (you can find our review here or on my open science account here). Let me say just this: if you are a policing scholar or practitioners interested in procedural justice or citizen perception of the police in general, you should get this book.
I was honoured to be invited by Kohei Watanabe and Atsushi Tago to give a talk this Wednesday at Waseda University in Tokyo. Upon their request, I was discussing my paper, which is currently under the second round of peer review at the Journal of Quantitative Criminology, from a methodological perspective. Readers of this blog should be familiar with these techniques (for details see the following thread of posts), for which I have already made available the code and the data to encourage future replications. You can find my presentation below, after the page break.Continue reading “Presentation at Waseda University”
Our ESRC project – From coercion to consent: social identity, legitimacy, and a process model of police procedural justice (CONSIL) – had its first workshop this Thursday, on 28th February. It was an excellent opportunity to discuss our research with team members from other universities and to get feedback from officers of various police forces. Jonathan Jackson and I also gave a presentation on the experimental branch of the project and virtual reality (VR) experimentation in particular.Continue reading “CONSIL workshop and ‘Experiments in VR’ presentation”
I am still very new to blogging – a couple of people have recently suggested that I should publish my conference presentations on my website, which is so obvious but has never occurred to me earlier. I had the privilege to give two presentations last weekend at EUROCRIM in Sarajevo.
In this third, and final post on causal mediation analysis with multiple mediators (see the first two here and here), I discuss the case of sequentially ordered mediators. Continue reading “Causal mediation analysis with multiple mediators 3. – Sequentially ordered mediators”
This is the second installment in a series of posts on causal mediation analysis with multiple mediators (see the first one here), which discusses how to handle the case of post-treatment confounding. Continue reading “Causal mediation analysis with multiple mediators 2. – Post-treatment confounding”
To kick off the year with an “easy” and “light” topic, I decided to start a series of discussions on causal mediation analysis with multiple mediators. Because the remaining papers in my PhD rely on such techniques, I thought it might make sense to write a brief summary of the different approaches one can take. I am aware that in a rapidly advancing field such as causal inference this post risks becoming obsolete very quickly, at the same time, I hope that this overview can still remain relevant for some upcoming papers (and posts). Continue reading “Causal mediation analysis with multiple mediators 1. – Causal independence and joint mediation”
This post should be considered as an addendum to this previous one that discussed causal mediation analysis with a single mediator. That post ended with the argument that causal evidence could be found that procedural justice indeed mediated the effect of the treatment (previous experiences with the police) towards the outcome (normative alignment with the police). This post will discuss two sensitivity analysis techniques which assess this finding’s robustness to unmeasured confounding. Continue reading “ScotCET and sensitivity analysis for causal mediation analysis with a single mediator”
This post finishes the discussion of two other ones (this and this) by providing an example how to carry out causal mediation analysis with a single mediator in R. The “mediation” package is utilised, for a full description of the package’s capabilities, you can refer to Tingley et al. (2014). For STATA users out there, there is a “paramed” package in STATA which should also produce the same results (within rounding error). A note of caution though: the “paramed” package can only be used with linear mediators and outcomes, and with binary logit models with rare outcomes (see: VanderWeele 2016). The dataset for the analysis can be downloaded from the bottom of the page. Continue reading “ScotCET and causal mediation analysis with a single mediator 3. – A demonstration in R”
This post continues the discussion of the Scottish Community Engagement Trial (ScotCET). In four posts (you can find them here, here, here, and here) I discussed the apparent failure of implementation over the summer. I concluded that despite the unexpected direction of the findings (i.e., those who received the procedurally just treatment had more negative opinion of the police), the treatment effect appeared to be consistent, was not heterogeneous, and thus it could be actually attributed to the research design. Continue reading “ScotCET and causal mediation analysis with a single mediator 1. – Procedural justice and normative alignment with the police”