Konsumen
Jika dilihat dari perilaku konsumen dalam mengonsumsi suatu barang dibedakan menjadi dua macam, yaitu perilaku konsumen rasional dan perilaku konsumen irasional.
Suatu konsumsi dapat dikatakan rasional jika memerhatikan hal-hal berikut:
Martin Lindstrom
Di buku "Buyology: Truth and Lies About Why We Buy", Lindstrom menganalisis hal-analyzes what makes people buy in a world which is cluttered with messages like advertisements, slogans, jingle, and celebrity endorsements. Through a study of the human psyche, he discusses the subconscious mind and how it plays a major role in deciding what the buyer will buy. The author claims to have studied the behavior of 2,000 humans for three years.