“…3 For instance, see Duffie and Singleton (1997), Elton, Gruber, Agrawal, and Mann (2001), Colin-Dufresne, Goldstein, and Martin (2001), Houweling, Mentink, and Vorst (2003), Huang and Huang (2003), Perraudin and Taylor (2003), Chen, Lesmond, and Wei (2006), Edwards, Harris, and Piwowar (2006), Eom, Helwege, and Huang (2004), Liu, Longstaff, and Mandell (2004), Longstaff, Mithal, and Neis (2005), and De Jong and Driessen (2005). 4 For example, Edwards, Harris, and Piwowar (2006) show that of the 70; 000þ corporate bonds outstanding in 2004, less than 17,000 experienced more than 9 trades that year.…”