63. Matching Madness: Causal Inference in Political Methodology
64. Too Good to Be True (læs også dette, dette og dette)
65. Code and Data for the Social Sciences: A Practitioner’s Guide 
(ht @FrederikHjorth)
66. Using Version Control with RStudio
67. Easy pictograms using R
68. Creating publication quality graphs in R
69. Plotting Likert-Scales (net stacked distributions) with ggplot