"Ceteris paribus" is a Latin phrase that translates loosely as, "all other things being equal". Used widely in economics, the assumption of ceteris paribus is an economist's version of a frictionless table: ignoring the details lets you see the general principle. This hand-stamped tie bar is certain to be the coolest tie accessory at the AEA meetings.
Available in aluminum or bronze, it is sturdy enough to last a lifetime. (Note that hand-stamped lettering varies a little, so yours will be charmingly unique.)