Assorted links

1. Sinkholes, including one bovine example.

2. Julio Rotemberg, with a new theory of Fed policy (pdf, via Arnold Kling).

3. Can this big orange ball save you?

4. Tokyo does live snail facial therapy.

5. What is happening to serendipity and browsing in the on-line world?, by Virginia Postrel: “…consumers are more than twice as likely to buy books on impulse in a bookstore than online, according to Bowker Market Research.”

6. How stores track shoppers.