The document discusses the bandwagon effect in the context of iPhone sales in India. It defines the bandwagon effect as when people do or believe something because others are also doing it. An example given is someone buying an iPhone just because everyone else has one, even if they don't have a real need for it. The document notes that iPhone sales in India saw a 93% year-over-year growth in the third quarter of 2015, higher than the 87% growth seen in other markets like China. It suggests the bandwagon effect, with people wanting to join the "in crowd" of iPhone users, positively impacts iPhone sales in India.