When compact discs first entered the market, they were priced significantly higher than vinyl records  Manufacturers attributed the difference in price to the difference in production costs, saying that compact disc production was expensive because the technology was new and unfamiliar  As the technology became more efficient, the price of the discs did indeed come down
But vinyl records, whose production technology has long been established, then went up in price to approach that of compact discs
As consumers bought compact discs instead of vinyl records, the number of vinyl records produced decreased, making their production less cost-efficient.