Table 1 

Relative differences (natural log) in nightlight intensity in North Korea and various regions across periods. Calculations performed using Welch two sample t-tests with unequal variances. Multiply the results by 100 to see percentage changes.

(*p<0.05, **p<0.01, ***p<0.001) Note:The regions of Pyongyang, Kaesong, Rason, and Ryanggang, as well as Nuclear Facilities, Missile Launch Sites, and Chemical Facilities contained relatively few observations. As a result, statistical significance is difficult to establish. These results may reflect real effects, but the limited data prevents us from drawing firm conclusions.
Chart: Brandon CallegariCreated with Datawrapper