Marginal Revolution

Wuthering Heights

When Dante Gabriel Rossetti read the novel Wuthering Heights, he wrote to a friend: "The action takes place in Hell, but the places, I don't know why, have English names.

That is from Jorge Luis Borges, Selected Non-Fictions.

Wheat Prices are Down

Rice prices remain high, however, although world production is up a little bit (data on rice). Hat tip to Carpe Diem.

Good sense on food prices

It seems to me odd to fault the World Bank for advice some 15 years ago to eliminate import protection--so that domestic prices could come down at the time--while at the same time complaining about high prices now, even with the benefit of hindsight.  If developing countries had all kept their import protection, the global supply of food would have been lower today, not higher. (That is because import protection would have led global production to be reallocated from efficient exporters to inefficient importers.) If you are for self-sufficiency, you must be willing to live with high prices.   

No, that's not me, that's from Dani Rodrik.

Bernanke's bubble laboratory

Manias can persist even though many smart people suspect a bubble, because no one of them has the firepower to successfully attack it. Only when skeptical investors act simultaneously -- a moment impossible to predict -- does the bubble pop.

...Mr. Bernanke hired finance experts who had broad interests and were eager to work with the university's deepening bench of theorists. He lured Dilip Abreu, known for work in game theory, back from Yale, to which he had earlier defected. Making a virtue of an institutional weakness, the absence of a business school, Princeton assimilated the finance scholars into the economics department and freed them to pursue research.

They are building on work done by the late Hyman Minsky, whose once-ignored ideas about investing manias are now in vogue, and the late economic historian Charles Kindleberger, whose 1978 "Manias, Panics and Crashes" is a classic. But compared with Mr. Minsky or another student of bubbles, Yale's Robert Shiller, the Princeton trio focuses less on mass psychology than on mathematical models. These they use to show how bubbles can be created even in markets that include rational, calculating investors.

Here is the full story, interesting throughout.

Retail loyalty card programs

From some time ago, Kevin Drum reports:

I really loathe retail loyalty card programs. 

These programs serve two functions.  First, they are a form of price discrimination.  Buyers who are willing to collect and show the cards pay lower prices while the "I can't be bothered with this ****" types pay higher prices. 

Second, retail loyalty cards enforce partial collusion ex post in an oligopolistic setting.  In other words, cards and frequent flyer programs "lock in" buyers to their favored firms.  Once that lock-in is accomplished, all firms have weaker incentives to cut price to lure away buyers from their favorites.  (The smarty-pants point is to note that firms have to give buyers a better deal upfront in anticipation of this lock-in but still if the company moves first with a non-negotiable offer it still can come out ahead and raise the P/MC ratio.)

The first function is usually welfare-improving, the second function usually is not.  Overall you personally benefit from loyalty card programs if you don't mind holding the cards (you have a thick wallet) and you have a strongly favorite company/product anyway.  In the latter case you are likely locked in anyway, so the strengthening of the lock-in effect doesn't so much restrict your freedom.  This is tricky of course because you might miss out on preemptive price cuts from your favorite firm to keep you, since maybe they don't otherwise know how much you love their stuff.  Still, I will stick with this mechanism as a plausible guess of the net effect.

You suffer from loyalty card programs if...you hate them.  Not only do the programs and the smiling clerks bug you but you are the kind of person who ends up paying more.  Which means you hate the programs even more.  Which means...

But wait: the equilibrium seems to converge and so Kevin Drum's anger at retail loyalty card programs remains, in reality, quite low.