Empirical evidence generally supports the persistence of price dispersion in online retail markets due to factors like product differentiation and search frictions, though some studies emphasize that actual transaction prices can approach the law of one price.
The claim is specific and testable. Multiple provided papers directly document persistent price dispersion in online markets (e.g., travel, consumer electronics), whereas one study suggests lower dispersion when analyzing transaction rather than posted prices. The weight of the provided evidence leans clearly in favor of persistence.