The interpretations assume that the "window" has positive value and that replacing it is not a good investment. In the broader scope, offsetting factors can reduce or even negate the cost of destruction. For example, new technologies developed during a war and forced modernization during postwar reconstruction can cause old technologies to become valueless. Also, if two shopkeepers keep their "window" beyond the point where it would maximize their profit, the shopkeeper whose window is broken is forced to make a good investment – increasing his comparative profit, or rather, reducing his comparative loss. Regardless, while wanton destruction of real value may not be a net loss, it is of course still a misfortune, not a blessing. Others argue that the broken window may not result in reduction of spending by the victim, but rather, a reduction in excessive savings. "The logic of limited resources only applies when the economy is using most of those limited resources. If there are slack resources, we need merely mobilize some of the slack resources."[who said this?] The reductio ad absurdum of breaking 100 windows, then, applies only when underutilised resources have been used, and the tailor is forced to divert resources from more productive means.
It has been argued that the parable, while intuitive, may not correspond to actual evidence. For instance, some economists argue that natural disasters can often result in improved growth in both the short and long term.