My article on estimating crime trajectories in Albany from 2000 through 2014 has been published in the latest issue of JQC.

That link is permanent, but Springer gifts me a temporary free pdf link for everyone for up to four weeks. So grab that if you are interested.

Also note though that I have the pre-print posted on SSRN. Since that is Albany PD’s data, I cannot provide code to replicate the analysis. But, I have produced a series of blog posts showing to to replicate the trajectory and the point pattern analysis on your own data if you are interested, see

• Estimating group based trajectory models using SPSS and R
• Some plots to go with group based trajectory models in R
• Group based trajectory models in Stata – some graphs and fit statistics
• The spatial clustering of hits-vs-misses in shootings using Ripley’s K

Here is the cross Ripley’s L plot testing for clustering between the different trajectory groupings.

Also always feel free to send me an email if you have questions about the findings and paper.