Figure 7.

The average daily difference in steps 7 days before and 7 days after edge creation as a function of current node degree (x-axis), edge initiator (sender vs receiver), and edge type (friend vs follow). Dashed lines show corresponding baselines (see Section 5). We observe significant physical activity increases after edges get created, but decreasing effect sizes with each additional edge. The effect is larger for edge senders compared to receivers and larger for friend edges compared to follow edges.