Michigan’s Felony Firearm Statute (Gun Law) imposed a two-year mandatory add-on sentence for defendants convicted of possession of a firearm in the commission of a felony. The Law was widely advertised with proponents claiming that it would introduce greater...
McDowall, Loftin, and Wiersma (1996) avoid our criticisms of the univariate interrupted time series design (ITSD) by misstating our criticisms, by addressing what they claim we ”implied” rather than what we plainly stated, and by ignoring crucial points in...
Interrupted time series designs are commonly used to assess the impact of gun control legislation, as well as other legal and policy changes. Three common problems in the use of these designs-(1) selection of an appropriate control series, (2) specification of the...
The strength of research designs is relative. Compared with true experiments, quasi-experimental designs are weak. Compared with cross-sectional designs, they are strong. One can further strengthen inferences from quasi-experiments by examining a broader pattern of...
