Paul Carr defends the New York Times metered access plan with reference to economist Hal Varian's "versioning" of digital goods: "Different consumers may have radically different values for a particular information good, so techniques for differential pricing become very important ... [One] particular aspect of differential pricing [is] known as quality discrimination or versioning ... The point of versioning is to get the consumers to sort themselves into different groups according to their willingness to pay." Read More...