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Pricing Regimes in Disaggregated Data

  • Luminita Stevens

    (Columbia University)

This paper develops a test for changes in the distribution of good-level prices over time and applies it to grocery store data. The method is based on the Kolmogorov-Smirnov statistic, which measures the distance between two empirical distributions. This test is robust to different data generating processes and does not require specific a priori knowledge about patterns in the data. I find that the typical pricing regime lasts seven months yet consists of a small number of distinct prices: for the large majority of regimes, five or fewer unique prices account for more than 90% of the regime. The test provides a natural way to investigate the prevalence of sticky pricing plans, since the identified change points serve as estimates of transitions to new plans. I find strong evidence in favor of rigid pricing plans: in addition to rigidity of the modal price of each regime, 76% of product series exhibit some degree of within-regime rigidity among non-modal prices; conversely, only 18% of series consist entirely of one-to-flex regimes in which prices flexibly deviate from the rigid mode; the remaining 5% consist of single sticky price regimes.

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File URL: https://economicdynamics.org/meetpapers/2011/paper_1389.pdf
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Paper provided by Society for Economic Dynamics in its series 2011 Meeting Papers with number 1389.

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Date of creation: 2011
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Handle: RePEc:red:sed011:1389
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Society for Economic Dynamics Marina Azzimonti Department of Economics Stonybrook University 10 Nicolls Road Stonybrook NY 11790 USA

Web page: http://www.EconomicDynamics.org/
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