sentences:  In 2001, Rutgers University sociology professor Ted Goertzel considered multiple regression to be not of much use in proving causal arguments in studies by Lott (and by Lott's critics Levitt, Ayres and Donohue).The National Academy of Sciences panel that reported on several gun control issues in 2004 looked at Right-To-Carry laws in Chapter 6 and endorsed neither the Lott & Mustard (1997) level and trend models as definite proof nor the Ayres & Donohue (2003) hybrid model as definite refutation of Lott's thesis