Seems that a person’s mood can affect their purchasing behavior.
The paper is called "The Many Shades of Rose-Colored Glasses: How Positive Emotions Influence Desire for Consumer Products". Here’s an excerpt from ScienceDaily about it….
The authors studied how product preferences changed depending on whether a person was feeling pride, contentment, or a neutral emotional state. Some participants read a short story in which they imagined doing well on an exam, which is known to elicit pride. “We found that pride enhanced desire for public display products,” the authors write. “Feeling pride led people to want nice watches, shoes, and clothing for going out. However, pride did not enhance desire for home products.”
In contrast, the emotion of contentment led people to want products for their homes. “When people felt contentment, they were more attracted to products such as beds, dishwashers, and clothing for lounging around the house,” the authors write. They were less enthusiastic about public display products.
“Our findings suggest that shoppers are likely to want to buy different products depending on the specific emotions that they are feeling,” the authors write. “If a retailer is selling products that allow the consumer to ‘show off’ to other people, this retailer may want to induce feelings of pride through store atmospherics or advertising. In contrast, a retailer selling primarily home furnishings might want to try to induce feelings of contentment.”