an illuminating report observes, "In 1930, the cost per minute for a 200 mile call was about 10 times the cost of sending a first class letter." Also in 1930, a 3-minute call between the US and the UK (which would have been routed by radio, as the first telephone cable across the ocean didn't come into service until 1956) would have cost about $450 if expressed in 2019 dollars. Technological advances (and, later, increased competition) pushed the numbers down the logarithmic scale through the years. And, yes, the downward trend continued beyond 1990, eventually approaching zero with Internet telephony, but competitive and complex discount plans make it harder to extract accurate and representative data for later dates. The overall conclusion's clear, though; it's become a lot cheaper to communicate electronically.
A note on sources and data: while I won't attempt to enumerate a full set of bibliographic citations for a blog post, I was impressed to find the Internet Archive's downloadable collection of telephone directories dating back to the early 1900s; thanks, Brooklyn Public Library, for scanning them. Also, thanks to Andrew Odlyzko for his excellent papers and articles on communications history. And, to the US FCC for their 1997 reports discussing communications costs and their evolution over time. And, to the Internet itself, for bringing such sources to my laptop quickly and without need for paper correspondence or physical travel to remote libraries. The numbers as graphed reflect peak-hour ("standard") rates as I found them, with some adjustments like using nearby years based on availability and scaling where lengths of rated calls were different. I applied inflation adjustments using the BLS CPI calculator.
I knew Andrew Odlyzko when he was out here at the U of MN running some sort of digital initiative in the computer science department. He invited me to give a talk on authentication after the second book came out.ReplyDelete
Incidentally, there's nothing morally corrupt about including sources in a blog post. It raises the tone of the whole Internet.ReplyDelete
I wasn't intending to imply that references were taboo, just thinking that a complete set of footnoted citations could seem a bit over the top in the context.Delete
By the way, I capitalized Internet in the previous comment, but my current publisher insists it should now be lowercase. I'm skeptical but didn't feel like arguing. They got to do the global search/replace themselves - I just had to check to be sure something didn't come out "internet Protocol" or so.ReplyDelete