This Research Note investigates party advertising in newspapers and on social media (Facebook) during the 2019 general elections in Flanders, the largest region of Belgium. The 2019 elections saw a marked increase in the use of social media advertising by parties, whereas newspaper advertising saw a decline. Prior research that compares multiple types of advertising, particularly advertising on social and legacy media remains limited. As such, based on a quantitative content analysis we investigate not just the prevalence of party advertising on both types of media, but also compare the level of negativity, presidentialisation, and issue emphasis. Our analysis reveals substantial differences: we find that not only the type of advertisements varies across the platforms, but also that social media ads tend to be more negative. Finally, parties’ issue emphasis varies substantially as well, with different issues being emphasized in newspaper and Facebook advertisements.

Sub-constituency campaigning occurs when parties focus their campaign resources on specific geographical areas within an electoral district. This behaviour was traditionally thought to occur only in single-member plurality elections, but recent research demonstrates that proportional systems with multi-member districts can also elicit sub-constituency campaigning. However, most studies of sub-constituency campaigning rely on self-reported measures of campaigning, not direct measures of campaign intensity in different regions and communities. We present novel data on geographical variations in the intensity of Flemish parties’ campaign advertising during the 2014 general elections in Belgium, which provides a direct measure of sub-constituency campaigning. Our findings show clear evidence of sub-constituency campaigning: parties campaign more intensely in municipalities where they have stronger electoral support and in municipalities with greater population density.