Confession. -- I almost never claim travel expenses. Lecturing trips are time away from what is most precious to me: being with my family, and working on my papers or books. And when I am finally able to return to these wonderful activities, the last thing I want to do is to fill out tedious forms asking me to specify how long I took for which part of the journey, or why there was no alternative to taking a taxi. -- And yet, I shudder at the thought of how much money I have "given away" to foreign universities over the years. It would pay for a very long holiday somewhere truly exotic (with family, papers and books).