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competition prevents producers from realizing and passing on savings from scaling down in response to a tax hike. The fourth model generalizes the ‘quality ladder’ model in Khandelwal (2010) to allow for substitution or complementarity effects between consumer valuation of affordability and quality. We find that variation in pass-through depends on price-quality complementarity. For products with longer ‘quality ladders’ where differences in quality are the starkest, we show that pass-through is larger when there is a high enough degree of price-quality complementarity