Construct	Source	Code	Items
Mood alleviation	Kang and Johnson (2011)	Mood1	Shopping is an escape from loneliness.
		Mood2	Shopping for something new fills an empty feeling.
		Mood3	Shopping is a way to take my mind off things that are bothering me.
		Mood4	Shopping is a way to remove myself from stressful environments.
		Mood5	Shopping is a way to control my situation when other things seem out of control.
Shopping enjoyment	Latorre Roman et al. (2014)	Enjoy1	I enjoy shopping.
		Enjoy2	Shopping helps me relax.
		Enjoy3	Shopping gives me energy.
Socialization seeking	Brown et al. (1993); Dey and Srivastava (2017)	Social1	When shopping, I take time to interact with other people.
		Social2	I want to get responses from other people for my shopping.
		Social3	The reaction of friends or family influences my shopping activities.
		Social4	I like to see my friends or family shopping.
Self-control seeking	Maas et al. (2017)	Control1	After a hard day's work, I often feel that I deserve to do shopping.
		Control2	When I feel bad I think that shopping will help me to feel better for a moment.
		Control3	I know that shopping will help me overcome negative emotions.
		Control4	When I feel sad, I expect that shopping will comfort me.
		Control5	When I feel miserable, I think that I would do myself a favor by shopping because it will make me feel better for a while.
Intention in high-priced goods purchase	Revised based on Zhang and Kim (2013)	High intention 1	In the future, I am willing to purchase products at a higher price than I usually buy.
		High intention 2	I intend to buy a product at a higher price than I usually buy in six months.
		High intention 3	I will continue to buy expensive products.
		High intention 4	I am interested in purchasing products that are more expensive than usual.
Intention in bulk goods purchase	Revised based on Zhang and Kim (2013)	Bulk intention 1	I will continue to buy more products than usual in the future.
		Bulk intention 2	I plan to buy more products at a price similar to what I usually buy.
		Bulk intention 3	I will continue to buy many products at once even if I do not need it now.
		Bulk intention 4	I will buy more of the type of items I usually buy.
Actual high-priced goods purchase	Revised based on Zhang and Kim (2013)	High purchase 1	In the last six months after the onset of COVID-19, I have purchased a product at a price higher than I would normally pay.
		High purchase 2	In the last month, I have purchased a product at a price higher than I would normally pay.
		High purchase 3	After the outbreak of COVID-19, I bought an expensive product.
		High purchase 4	Since COVID-19 began, I have become interested in purchasing products that are more expensive than usual.
Actual bulk goods purchase	Revised based on Zhang and Kim (2013)	Bulk purchase 1	In the last 6 months after the onset of COVID-19, I have bought more products than usual.
		Bulk purchase 2	I have bought more products at a price level similar to what I normally buy in the last month.
		Bulk purchase 3	Since COVID-19 began, I have bought more of the type of items I usually buy.
		Bulk purchase 4	Since COVID-19 began, I have bought several products at once even though I do not need them now.