Professor Becker , 2000                                                                                               Professor Coase

Steve,  2002                                                                                                               Professor Maskin, 2007

Mike and Kathryn , 2006                                                                                                    Michael, 2007

Ken and Mia May 2008                                                                                            Nancy and Prof. Lin Jin-Tan , 2007                                                                        

Emily , 2006                                                                                     Seminar at Guanghua Management School, Beijing University, 2008                                                                      

                                       Steve 2008                                                                            Prof Parish and Wan-chi, 2008

Hoyt, 2008                                                                                                                    Jane, 2008