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Shrinking Goods and Sticky Prices: Theory and Evidence

  • Avichai Snir


    (Bar-Ilan University; Humboldt-Universität zu Berlin)

  • Daniel Levy


    (Bar-Ilan University; Emory University; RCEA)

If producers have more information than consumers about goods’ attributes, then they may use non-price (rather than price) adjustment mechanisms and, consequently, the market may reach a new equilibrium even if prices remain sticky. We study a situation where producers adjust the quantity (per package) rather than the price in response to changes in market conditions. Although consumers should be indifferent between equivalent changes in goods' prices and quantities, empirical evidence suggests that consumers often respond differently to price changes and equivalent quantity changes. We offer a possible explanation for this puzzle by constructing and empirically testing a model in which consumers incur cognitive costs when processing goods’ price and quantity information. The model is based on evidence from cognitive psychology and explains consumers’ decision whether or not to process goods’ price and quantity information. Our findings explain why producers sometimes adjust goods’ prices and sometimes goods’ quantities. In addition, they predict variability in price adjustment costs over time and across economic conditions.

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Paper provided by The Rimini Centre for Economic Analysis in its series Working Paper Series with number 17_11.

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Date of creation: Mar 2011
Date of revision:
Handle: RePEc:rim:rimwps:17_11
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