No, it’s not a natural monopoly*. What I meant is pretty well handled by Mandelstam:
Property rights in various things including spectrum are hard to deal with. They are costly to define and subject to strategic behaviour in trade. Imagine before radio and TV. Could it be said that each person (or at least each landowner) owned a portion of the rights and that no-one could use those rights without their consent? Or could it be said that no-one owned the rights until the first person claimed them? This is the question to which I was alluding when I said
Note that in the first case a market would struggle to emerge since a putative spectrum owner would have to buy the rights from every last person to use them. This encourages everyone to “hold out” for the biggest slice of the loot in the strategic flip-side to the free-rider problem. In passing, note that this is the economic justification for what we call “resumption” and what I believe you call “eminent domain” - the compulsory acquisition of land for roads and sundry development purposes. In the second case, the rights of ordinary citizens are basically being stolen.
Now back to this business of public goods. As I thought I already said, spectrum isn’t one. And of course you can charge a fee to get into a shopping complex (although those that do are typically once off sales and others uninterested in repeat business). Mall owners don’t charge a fee because they recoup through higher rents due to economies of scope in shopping.
The shopping mall analogy is pretty good. Certainly the government could auction the spectrum to the highest bidder (or, better, portions of the spectrum using more complicated auction procedures to avoid the winner’s curse problem in such auctions). The owner would then licence users or operate stations themselves. But then you do run into public good, monopoly and spatial competition problems.
First, if the signal is broadcast, you have the quality degradation problem I mentioned before. Secondly, if you run cable-type encryption, you are excluding users who have some valuation of the broadcast who can in fact be supplied without cost. This is a typical intellectual property problem: once the thing is created, it is jointly consumable. To charge any price is inefficient, but not to charge a price reduces the quantity supplied. It’s a trade-off and we don’t know the terms.
The monopoly problem is that the spectrum owner will try to maximise returns. This will result in lower output and higher (access to spectrum) prices. Now it may be that this effect and the quality degradation effect balance each other out - since they work in opposite directions - but there’s no particular reason to think they would.
The other problem is variety, otherwise known as “Why is there so much fucking Billy Joel on the radio?” In competing for audiences, radio stations tend to serve the oldies and the vapid teen markets. A lot of niches seem unfilled. My old band, for example, only got commercial airplay after we went top ten - before that it was all community and public radio. A story - due to Hotelling - gives the general flavour of what’s going on here (although this area remains controversial in economics and you should bear in mind that I’m not an Industrial Organisation economist). Suppose there is a mile-long beach with two (or however many you like) icecream stalls on it (and the beach owner prohibits Eskies). They will tend to locate close together, since they can get the biggest market share by so doing. This is clearly not optimal since average walking times are higher than if the stalls were placed at 1/3/ 2/3 along the beach. Allowing people to bring their own cold stuff (cf people who don’t like radio substituting to CDs) is unlikely to be optimal either. (BTW you can apply this story to the positioning of political parties in a fairly obvious way.)
Now at the end of a rather long post, you’re going to get what you should expect from an economist: I don’t really disagree with what you say, but the situation’s a bit more complicated than it first seems (and we haven’t even brought in the question of whether consumers really know what they want). Is a privatisation of spectrum and the conversion of broadcast to encryption a viable option? Sure. Would you expect niche narrowcasting to replace broadcasting in such a system? Probably not unless you banned broadcasting, they’re too well established. Would it be better if you did? Hard to say, too many competing considerations, not enough hard information discernible from current market behaviour. Is one obviously preferable from a property rights/ natural rights/ libertarian perspective? I don’t think so unless you’re prepared to ignore consent where it doesn’t suit pro-market arguments. But: Do markets and governments have incentives to provide too little variety? Yes, but there’s no clear way to do anything about it.
- [sub]I might as well define this as well. Certain products get cheaper to produce if you produce more of them and certain combinations of products get cheaper to produce if you produce more of them together. These are respectively economies of scale and scope. The point where average costs are a minimum is called minimum efficient scale. When product variety is terribly important for consumers this tends to produce an industry featuring a small number of large firms and some (usually non-price) competition, with all firms producing less than minimum efficient scale (the modern beer industry).
When product variety is not important and scale economies are large compared to the size of the market, the industry is a natural monopoly. From society’s point of view it is better to have only one firm in the market since it uses fewer resources to produce the product, but a single firm in the industry tend to restrict quantity and innovation, be subject to organisational slack (“X-inefficiency”) and drive up prices to the detriment of consumers. Electricity, water and gas distribution fall into this category (others - like the wide-bodied aircraft industry are more debatable). These industries are typically subject to regulation (or public ownership) to curb monopoly practices but not attempts to introduce competition (since two pipes cost heaps more than one and competition is likely to be unsustainable). Although there are significant economies of scope in news collection, I doubt that this rather than the spatial competition question addressed above is the main reason for the apparent lack of variety in news coverage.[/sub]