@article {drakopoulos1992psychological,
	title = {Psychological thresholds, demand and price rigidity},
	journal = {The Manchester School},
	volume = {60},
	number = {2},
	year = {1992},
	pages = {152{\textendash}168},
	publisher = {Blackwell Publishing Ltd Oxford, UK},
	author = {Drakopoulos, Stavros A}
}
