Quality newspapers have higher quality maps than popular newspapers.
These seem to be common sense statements, but even those need to be checked and proved. The first hypothesis was easy to check. Figure 2 shows the increase of the number of maps, and also shows that the major increase happened between 1988 and 1992. The number of colour maps increased likewise, stand alone maps increased and topical maps increased, both absolutely and relatively. Maps on the front page indeed were mostly one column in width and had colour as well.