8.6 Articles and Pages

I’ve mostly been analysing the data here by looking at how many articles (or how many expected articles) are in a topic. But there’s a case to be made for using pages rather than articles as the basic measure. To give you a sense of how much this matters, here are the topics with the longest and shortest average lengths.19

Table 8.18: Topics with Longest Average Page Length
Topic Average Length
Norms 20.2
Liberal Democracy 18.6
Population Ethics 17.9
Cognitive Science 17.8
Egalitarianism 17.7
Table 8.19: Topics with Shortest Average Page Length
Topic Average Length
Truth 10.9
Origins and Purposes 11.2
Verification 11.3
Propositions and Implications 11.3
Deduction 11.8

The difference between the longest and the shortest is almost a 2:1 ratio. So if you measured things by pages, it would make some changes. But in most cases, this difference won’t show up on the graphs I’ve displayed so far. That’s because most of the differences are screened by the changes in average article lengths over time. That is, most of the changes are due to the fact that the topics appear at different times in the data, and that the norm for article lengths change over time.

There are some exceptions to this. The Truth topic has a lot of short-ish articles appearing in recent times, when the article lengths have been getting longer. Though even there something weird happens. Many of these articles are in Analysis, and they are very long by Analysis standards, but short overall. Still, it’s worth looking at just how much article lengths have changed to provide a sense of how much these changes in length fashions are driving the tables in this section.


  1. Note I’m using weighted, or expected, articles here, so for each topic I’m summing over all articles the probability of the article being in that topic times the length of the article, and dividing by the expected number of articles in the topic.↩︎