It is often said, "Don't kill the messenger," but that is precisely what everyone seems to want to do in my case. I'm not sure why because the news I bring is neither good nor bad. It is simply the truth; and it is a very sad day when telling the truth can foster such ill will. There are some who go so far as to declare my very existence wicked simply for providing information people use to engage in a specific type of voluntary exchange that, although of immense benefit to society, has somehow acquired an unsavory reputation.
As you may have surmised, I am the rate of interest, the price difference between present goods and future goods. Now, many economists mistakenly identify me merely as the price of borrowing money over time, but that is only one of the many messages I carry. I also represent the price spread in the various stages of production, where capitalists purchase present goods in the form of factors of production in the hopes of selling what is produced by those factors for a higher price than what they spent. I am also this difference in price.