“…Killeen and Jacobs present one perspective in this issue (and provide a tutorial in linear algebra to help understand their argument). Contrary to claims in poorly written texts, reinforcers can be predicted a priori when theory is paired with quantitative sophistication, as demonstrated by work in behavior regulation (Hagge & Van Houten, 2016;Jacobs, Morford, King, & Hayes, 2017;Konarski, Crowell, & Duggan, 1985;Konarski, Crowell, Johnson, & Whitman, 1982;Konarski, Johnson, Crowell, & Whitman, 1980, 1981Timberlake & Allison, 1974;Timberlake & Farmer-Dougan, 1991) and behavioral economics (Borrero, Francisco, Haberlin, Ross, & Sran, 2007;Donaldson, DeLeon, Fisher, & Kahng, 2014;Foxall, 2015Foxall, , 2016Hursh, 1980;Oliveira-Castro, Cavalcanti, & Foxall, 2016;Peery & Fisher, 2001;Reed, Kaplan, Becirevic, Roma, & Hursh, 2016;Roane, Falcomata, & Fisher, 2007;Tustin, 1994).…”