Approximately what percentage of daily newspapers are owned by large media conglomerates?

Search engines generate revenue through pay-per-click (each time a user clicks a link to a retailer’s website); pay-per-call (each time a user clicks a link that takes the user to an online agent waiting for a call); or pay-per-conversion (each time a website visitor is converted to a customer)

When a market is in equilibrium, the buyers are those with the willingness to pay and the sellers are those with the costs.

Winston churchill's stamp collection was valued at $14 million when he died. at auction, it brought in only $4 million. what was it worth? why?