Register for an account


Enter your name and email address below.

Your email address is used to log in and will not be shared or sold. Read our privacy policy.


Website access code

Enter your access code into the form field below.

If you are a Zinio, Nook, Kindle, Apple, or Google Play subscriber, you can enter your website access code to gain subscriber access. Your website access code is located in the upper right corner of the Table of Contents page of your digital edition.

The Sciences


Cosmic VarianceBy Sean CarrollFebruary 13, 2008 7:29 AM


Sign up for our email newsletter for the latest science news

Brad DeLong disentangles the messages that a (male) professor sends by wearing a tie. (Inspired by this sad little diatribe, properly mocked here.)

I have found that wearing a suit and tie is very effective if done occasionally with non-math-oriented students. It tells them that I care because it shows that I have taken sufficient time to prepare and teach the class even though I am a busy person whose schedule requires meetings with:

With math-oriented students, however, a tie tells them that I spend too little time thinking about isomorphisms

Cf. Focus. Professors were once students.

  • some powerful political figure,

  • some powerful economic figure,

  • some powerful university administrative figure, or

  • some TV interviewer

    3 Free Articles Left

    Want it all? Get unlimited access when you subscribe.


    Already a subscriber? Register or Log In

    Want unlimited access?

    Subscribe today and save 70%


    Already a subscriber? Register or Log In